CN110727303B - Power supply apparatus having electronic circuit breaker and control method thereof - Google Patents

Power supply apparatus having electronic circuit breaker and control method thereof Download PDF

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Publication number
CN110727303B
CN110727303B CN201810777087.1A CN201810777087A CN110727303B CN 110727303 B CN110727303 B CN 110727303B CN 201810777087 A CN201810777087 A CN 201810777087A CN 110727303 B CN110727303 B CN 110727303B
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voltage
transistor
output end
electrically connected
power supply
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CN110727303A (en
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殷任霈
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Acbel Polytech Inc
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Acbel Polytech Inc
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/561—Voltage to current converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a power supply apparatus having an electronic circuit breaker and a control method thereof. The power supply equipment with the electronic circuit breaker comprises a power output end, a power converter and the electronic circuit breaker. Through the operation of the electronic circuit breaker, when an electric appliance is electrically connected between the power output end and the grounding end as a load, the electronic circuit breaker is started, so that the voltage output by the power converter can be output to the power output end to charge the electric appliance. When the electrical equipment is removed after charging, the electronic circuit breaker is closed, so that the voltage output by the power converter cannot be output to the power output end. Therefore, even if the power output end is exposed outside the shell, when the electrical equipment is not charged, the power output end can not output voltage, so that a user can not be shocked by mistake, and the use safety is improved.

Description

Power supply apparatus having electronic circuit breaker and control method thereof
Technical Field
The present invention relates to a power supply apparatus and a control method thereof, and more particularly, to a power supply apparatus having an electronic circuit breaker and a control method thereof.
Background
There are many electrical devices in modern homes, and generally, the electrical devices have a wire, so that the electrical devices can be electrically connected to the socket through the wire to receive the commercial power for normal operation. In addition, when the electrical equipment is movable, in order to facilitate the use of a user, the battery can be directly arranged in the movable electrical equipment, so that the electrical equipment can directly receive the electric energy of the battery to normally operate, the limitation of the wire is eliminated, and the user can conveniently move. When the power of the battery is consumed, the user needs to charge the electrical equipment, so that the next use is facilitated.
The charging device is electrically connected to the socket through a wire to receive electric energy, and the charging device is provided with a group of first charging electrodes. When the battery in the electrical equipment is not charged, the user can directly place the electrical equipment on the charging equipment, so that a group of second charging electrodes on the electrical equipment are contacted with the group of first charging electrodes on the charging equipment, and the battery in the electrical equipment can be electrically connected to the charging equipment through the group of first charging electrodes for charging.
In order to facilitate the sweeper to move to the charging device and make electrical contact with the charging device, the first charging electrode of the charging device must be exposed outside the housing to be in contact with the second charging electrode of the electrical device. However, when the first charging electrodes of the charging device are exposed outside the housing, the first charging electrodes are easily touched by the user by mistake, so that the user is easily shocked. Therefore, the existing charging equipment needs to be improved.
Disclosure of Invention
In view of the danger that the charging electrode of the conventional charging equipment is exposed and is easily touched by a user by mistake to cause the user to be shocked, the invention provides the power supply equipment with the electronic circuit breaker and the control method thereof.
The power supply apparatus with an electronic circuit breaker includes:
a power supply output terminal; a power converter having a first voltage output terminal and a second voltage output terminal; wherein the power converter performs feedback control according to the voltage output by the second voltage output terminal;
an electronic circuit breaker comprising:
the electronic switch is connected between the power output end and the second voltage output end of the power converter and is provided with a control end to control the on-off of the electronic switch;
a processing unit having a first input terminal, a second input terminal, a third input terminal and a first output terminal; the first input end and the second input end are respectively connected to a first voltage output end and a second voltage output end of the power converter, the third input end is connected with the power output end, and the first output end is connected with the control end of the electronic switch;
the processing unit executes a standby mode and judges whether the voltage value of the power supply output end is smaller than a starting critical value; when the processing unit judges that the voltage value of the power output end is smaller than the starting critical value, the processing unit generates a starting signal to be output from the first output end to control the electronic switch to be conducted so as to switch on the second voltage output end and the power output end, and the processing unit further judges whether the voltage value of the first voltage output end of the power converter is smaller than a closing critical value or not; when the processing unit judges that the voltage value of the first voltage output end is smaller than the closing critical value, the processing unit generates a closing signal to be output from the first output end, controls the electronic switch to be switched off, and executes the standby mode again.
The control method of the power supply equipment with the electronic circuit breaker is executed by the electronic circuit breaker and comprises the following steps:
receiving a first voltage output by a first voltage output end and a second voltage output by a second voltage output end of a power converter; wherein the power converter performs feedback control according to the voltage output by the second voltage output terminal;
receiving an output voltage of a power supply output end;
executing a standby mode;
judging whether the voltage value of the output voltage of the power supply output end is smaller than a starting critical value or not;
when the voltage value of the output voltage of the power supply output end is smaller than the starting critical value, a starting signal is generated, and the second voltage output end is connected with the power supply output end;
judging whether the voltage value of the first voltage at the first voltage output end is smaller than a closing critical value;
when the voltage value of the first voltage output end is smaller than the closing critical value, a closing signal is generated, the second voltage output end is disconnected with the power supply output end, and the standby mode is executed again.
When an electrical device is electrically connected to the power output end as a load through the operation of the electronic circuit breaker, the voltage value of the power output end is smaller than the starting critical value, the processing unit starts the electronic switch to be conducted, and the second voltage output end of the power converter is connected with the power output end to charge the electrical device. When the electrical equipment is removed after charging is completed, the charging current originally charging the electrical equipment is fed back to the second voltage output end of the power converter, so that the power converter is suspended, the voltage value of the first voltage output end of the power converter is smaller than the closing critical value, and the processing unit generates the closing signal to enable the electronic switch to cut off the connection between the second voltage output end and the power output end. Therefore, even if the power supply output end is exposed outside the shell, when the electrical equipment is not charged, the power supply output end can not supply power, so that a user can not be shocked by mistake, and the use safety is improved.
Drawings
Fig. 1 is a schematic circuit diagram of a power supply apparatus with an electronic circuit breaker according to a first preferred embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a power converter of the power supply apparatus having the electronic circuit breaker of the present invention.
Fig. 3 is a schematic circuit diagram of a power supply apparatus with an electronic circuit breaker according to a second preferred embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a power supply apparatus with an electronic circuit breaker according to a third preferred embodiment of the present invention.
Fig. 5 is a schematic circuit diagram of a fourth preferred embodiment of the power supply apparatus with an electronic circuit breaker according to the present invention.
Fig. 6 is a schematic circuit diagram of a fifth preferred embodiment of the power supply apparatus with an electronic circuit breaker according to the present invention.
Fig. 7 is a block schematic diagram of a standby power controller of a power supply apparatus having an electronic circuit breaker according to the present invention.
Fig. 8 is a circuit schematic diagram of a standby power controller of a power supply apparatus having an electronic circuit breaker according to the present invention.
Fig. 9 is a flowchart illustrating a control method of a power supply apparatus with an electronic circuit breaker according to a first preferred embodiment of the present invention.
Fig. 10 is a flowchart illustrating a control method of a power supply apparatus with an electronic circuit breaker according to a second preferred embodiment of the present invention.
Fig. 11 is a flowchart illustrating a control method of a power supply apparatus with an electronic circuit breaker according to a third preferred embodiment of the present invention.
Fig. 12 is a schematic flow chart illustrating a control method of a power supply apparatus with an electronic circuit breaker according to a fourth preferred embodiment of the present invention.
Reference numerals
11 power converter
12 electronic circuit breaker
121 processing unit
20 power supply
Detailed Description
The technical means adopted by the invention to achieve the preset purpose are further described below by combining the drawings and the preferred embodiment of the invention.
Referring to fig. 1 and 2, a first preferred embodiment of a power supply apparatus with an electronic circuit breaker includes a power output terminal V and a control method thereofoutA power converter 11 and an electronic circuit breaker 12(electronic circuit breaker). In the preferred embodiment, the power converter 11 is a DC-to-DC converter (DC-to-DC converter) 11.
The power converter 11 includes a first voltage output terminal OUT1 and a second voltage output terminal OUT 2. And the power converter 11 performs feedback control according to the voltage output by the second voltage output terminal OUT 2.
The electronic circuit breaker 12 includes a processing unit 121 and an electronic switch 122.
The electronic switch 122 is connected to the power output terminal VoutAnd the second voltage output terminal OUT2, the electronic switch 122 further has a control terminal for controlling on/off thereof. The processing unit 121 includes a first input I/P1, a second input I/P2, a third input I/P3, and a first output O/P1.
The first input terminal I/P1 is connected to the first voltage output terminal OUT1, the second input terminal I/P2 is connected to the second voltage output terminal OUT2, and the third input terminal I/P3 is connected to the power output terminal VoutThe first output terminal O/P1 is connected to the control terminal of the electronic switch 122.
The processing unit 121 executes a standby mode and determines the power output terminal VoutWhether the voltage value is less than a starting critical value; when the processing unit 121 determines the power output terminal VoutWhen the voltage value is smaller than the start threshold value, the processing unit 121 generates a start signal to be outputted from the first output terminal O/P1 to control the electronic switch 122 to be turned on to connect the second voltage output terminal OUT2 and the power output terminal VoutAnd the processing unit 121 further determining whether the voltage value of the first voltage output terminal OUT1 of the power converter 11 is less than a turn-off threshold value; when the processing unit 121 determines that the voltage value of the first voltage output terminal OUT1 is smaller than the off threshold, the processing unit 121 generates an off signal to be output from the first output terminal O/P1, controls the electronic switch 122 to turn off, and re-executes the standby mode.
The present invention operates through the electronic circuit breaker 12 when an electrical device (not shown) is electrically connected as a load to the power output terminal VoutWhen it is connected with a ground terminal GND, the power supply output terminal VoutThe voltage value of the voltage source falls to be less than the start threshold value, the processing unit 121 starts the electronic switch 122 to be conducted, and the second voltage output end OUT2 of the power converter 11 is connected to the power output end VoutTo charge the electrical device. When the electrical device is removed after the electrical device is charged, the charging current originally charging the electrical device is fed back to the second voltage output terminal OUT2 of the power converter 11 to suspend the power converter 11, so that the voltage value of the first voltage output terminal OUT1 of the power converter 11 is decreased to be smaller than the turn-off threshold, and the processing unit 121 generates the turn-off signal to enable the electronic switch 122 to cut off the second voltage output terminal OUT2 and the power output terminal VoutThe connection of (2). Thus, even if the power output end VoutIs exposed outside the casing, and the power output end V is used for charging the electrical equipmentoutThe power supply is not needed, so that the user can not be shocked by mistake, and the use safety is further improved.
As shown in fig. 2, the power converter 11 includes a primary loop unit 111, a primary coupling coil 112, a first secondary coupling coil 113, a second secondary coupling coil 114, and a control unit 115.
The primary-side loop unit 111 is electrically connected to a power source 20 for inputting ac power. The primary-side coupling coil 112 is electrically connected to the primary-side circuit unit 111. The first secondary side coupler 113 is coupled to the primary side coupler 112 and connected to the first voltage output terminal OUT1 for outputting a first voltage through the first voltage output terminal OUT 1. The second secondary-side coupling coil 114 is coupled to the primary-side coupling coil 112 and connected to the second voltage output terminal OUT2 to output a second voltage through the second voltage output terminal OUT 2. The number of turns of the first secondary side coupling coil 113 is greater than that of the second secondary side coupling coil 114. The control unit 115 is electrically connected to the second secondary-side coupling coil 114 and the primary-side loop unit 111, and the control unit 115 generates a control signal to control the primary-side loop unit 111 according to the second voltage output by the second secondary-side coupling coil 1114. In the preferred embodiment, the control signal is a Pulse Width Modulation (Pulse Width Modulation) signal.
In addition, the power supply apparatus with electronic circuit breaker may further include a power factor converter (not shown), and the primary side loop unit 111 of the power converter 11 is electrically connected to the power source 20 through the power factor converter.
Referring to fig. 3, a second preferred embodiment of the power supply apparatus with electronic circuit breaker is the same as the first preferred embodiment, but the electronic circuit breaker 12 further includes a first voltage dividing circuit 123, a second voltage dividing circuit 124, a third voltage dividing circuit 125 and a switch circuit 126.
The first input terminal I/P1 is connected to the first voltage output terminal OUT1 through the first voltage divider 123, the second input terminal I/P2 is connected to the second voltage output terminal OUT2 through the second voltage divider 124, and the third input terminal I/P3 is connected to the power output terminal V through the third voltage divider 125outAnd the second voltage output terminal OUT 2.
The first output terminal O/P1 of the processing unit 121 is connected to the control terminal of the electronic switch 122 through the switch circuit 126. The switch circuit 126 includes a first transistor Q1A second transistor Q2And a third transistor Q3。
The first transistor Q1Having a drain electrode, a gate electrode electrically connected to the first output terminal O/P1 of the processing unit 121, and a source electrode electrically connected to the groundGround terminal GND. The second transistor Q2Having an emitter electrically connected to the first voltage output terminal OUT1, a base electrically connected to the first transistor Q, and a collector1Of the substrate. The third transistor Q3Having an emitter, a base and a collector, the third transistor Q3Is electrically connected to the first voltage output terminal OUT1, the third transistor Q3Is electrically connected to the second transistor Q2The collector of (2).
The electronic switch 122 includes a first resistor R1And a fourth transistor Q4。
The fourth transistor Q4Having a drain, a gate and a source, the fourth transistor Q4Is electrically connected to the second voltage output terminal OUT2, the fourth transistor Q4Is electrically connected to the third transistor Q3The fourth transistor Q4Is electrically connected to the power output terminal Vout. The fourth transistor Q4The gate of (a) is the control terminal of the electronic switch 122. The fourth transistor Q4Is passed through the first resistor R1Is electrically connected to the fourth transistor Q4Of the substrate.
The operation of the power supply apparatus with the electronic circuit breaker of the present invention is described in detail as follows.
When the electrical equipment is not electrically connected to the power output end VoutDuring charging, the processing unit 121 executes the standby state, and a second voltage output from the second voltage output terminal OUT2 generates a divided voltage through the third voltage dividing circuit 125 to provide the power output terminal Vout。
When the electrical equipment is electrically connected to the power output end VoutWhen the electrical equipment is charged with the ground GND, since the electrical equipment is connected in parallel with the third voltage dividing circuit 125, the second voltage outputted from the second voltage output terminal OUT2 is generated by the third voltage dividing circuit 125 and provided to the power output terminal VoutThe partial pressure of (a) decreases. That is, the power output terminal V is nowoutThe voltage value of the voltage is decreased to be less than the starting critical value so that the voltage value is enabled to be less than the starting critical valueThe processing unit 121 generates the enable signal from the first output terminal O/P1 to the first transistor Q1A gate electrode of (1).
Due to the first transistor Q1The gate of the first transistor Q receives the start signal1Entering a conducting state to make the second transistor Q2The base of the second transistor Q is grounded2Is turned on and further makes the third transistor Q3Is connected to the first voltage output terminal OUT1, so that the third transistor Q3Is turned on and further makes the fourth transistor Q4To the first voltage output terminal OUT1, so that the fourth transistor Q4And conducting.
In detail, when the third transistor Q is used3When conducting, the first voltage output terminal OUT1 passes through the first resistor R1And the third voltage dividing circuit 125 is electrically connected to the ground GND to form a loop, and generates a current. Thus the fourth transistor Q4Between the gate and the source via the first resistor R1Generating a voltage difference to make the fourth transistor Q4Is turned on with the source, so that the second voltage output by the second voltage output terminal OUT2 can pass through the fourth transistor Q4Output to the power output terminal VoutAnd further electrically connected to the power output terminal VoutThe electric device 30 of (1) is charged.
In addition, since the power converter 11 is feedback-controlled according to the voltage outputted from the second voltage output terminal OUT2, that is, the second voltage output terminal OUT2 is the main feedback loop of the power converter 11, the control unit 115 of the power converter 11 determines whether to output the control signal according to the voltage of the main feedback loop, that is, the second voltage outputted from the second voltage output terminal OUT 2. When the second voltage exceeds a threshold, it indicates that the output voltage of the power converter 11 is over-high, so the control unit 115 will suspend outputting the control signal, thereby the output voltage of the power converter 11 recovers to a normal value, i.e. below the threshold, and when the second voltage does not exceed the threshold, the control unit 115 will continue outputting the control signal, so that the power converter 11 outputs the first voltage and the second voltage.
Therefore, when the electrical device is removed, the first resistor R passes through the first voltage output terminal OUT11And the third voltage dividing circuit 125 is electrically connected to the ground GND to form a loop, and the current generated by the loop is fed back to the second voltage output terminal OUT2 because the electrical device 30 is removed, so that the second voltage output by the second voltage output terminal OUT2 exceeds the threshold. At this time, since the second voltage outputted from the second voltage output terminal OUT2 exceeds the threshold, the control unit 115 suspends outputting the control signal, and when the control unit 115 does not output the control signal, the first secondary-side coupling coil 113 and the second secondary-side coupling coil 114 are not coupled to generate a voltage value. Therefore, the first voltage output by the first voltage output terminal OUT1 begins to drop, but the second voltage output by the second voltage output terminal OUT2 keeps exceeding the threshold value and does not drop because the second voltage output terminal OUT2 receives the reverse current.
Since the first voltage outputted from the first voltage output terminal OUT1 begins to drop, when the processing unit 121 determines that the voltage value of the first voltage output terminal OUT1 is less than the turn-off threshold, the processing unit generates the turn-off signal outputted from the first output terminal to the first transistor Q1A gate of the first transistor Q1Enters a cut-off state to further enable the fourth transistor Q4Enters a blocking state and returns the electronic circuit breaker 12 to a standby state.
In summary, the present invention operates the electronic circuit breaker 12 to electrically connect the electrical equipment as a load to the power output terminal VoutThe electronic circuit breaker 12 can be activated when the voltage is between the ground GND, so that the second voltage of the second voltage output terminal OUT2 of the power converter 11 can be output to the power output terminal VoutThereby charging the electrical equipment. When the electrical equipment is removed after charging, the electronic circuit breaker 12 can be turned off to disconnect the second voltage output terminal OUT2 and the power output terminal V of the power converter 12outThe connection of (2). Thus, aTo, even if the power supply output terminal VoutIs exposed outside the housing, and the power supply output terminal V is used when the electrical equipment 30 is not being chargedoutThe second voltage can not be output, so that the user can not be shocked by mistake, and the use safety is further improved.
Referring to fig. 4 again, a third preferred embodiment of the power supply apparatus with electronic breaker is the same as the second preferred embodiment, and the electronic breaker 12 further includes a fifth transistor Q5A sixth transistor Q6A second resistor R2And a first capacitor C1。
The fifth transistor Q5Having a drain, a gate and a source, and the fifth transistor Q5Is electrically connected to the first output terminal O/P1 of the processing unit 121, the fifth transistor Q5The source of the first transistor is electrically connected to the ground GND. The sixth transistor Q6Having a drain, a gate and a source, the sixth transistor Q6Is electrically connected to the third transistor Q3The base of the sixth transistor Q6Is electrically connected to the fifth transistor Q5The sixth transistor Q6The source of the first transistor is electrically connected to the ground GND. The second voltage output terminal OUT2 passes through the second resistor R2Is electrically connected to the fifth transistor Q5Of the substrate. The first capacitor C1Is electrically connected to the third transistor Q3Between the base of the first transistor and the ground GND.
Due to the fifth transistor Q5And the gate and source of the first transistor Q1The gate and source of (a) are connected in the same way, so that when the first transistor Q is connected1When entering the conducting state, the fifth transistor Q5And likewise will go into the on state altogether. While the fifth transistor Q is used5When entering the conducting state, the sixth transistor Q6Is connected to the ground terminal GND, so that the sixth transistor Q6The cut-off state is entered. In addition, as described above, when the first transistor Q is used1When entering the conducting state, the second transistor Q2Will also enterOn state, so that the first voltage output terminal OUT1 can pass through the second transistor Q2For the first capacitor C1Charging and letting the third transistor Q3Can follow the voltage of the first capacitor C1Is slowly raised, thereby soft starting (soft start) the electronic circuit breaker 12. The first capacitor C1Can determine the capacitance of the third transistor Q3The voltage of the base electrode is increased, so that the user can design the first capacitor C1The capacitance value of (c) sets the soft start time of the electronic circuit breaker 12.
Further, referring to fig. 5, a fourth preferred embodiment of the power supply apparatus with electronic circuit breaker is the same as the third preferred embodiment, but the electronic circuit breaker 12 further includes a feedback current generating circuit 127, and the feedback current generating circuit 127 includes a seventh transistor Q7An eighth transistor Q8A third resistor R3A fourth resistor R4And a fifth resistor R5。
The seventh transistor Q7Having a drain, a gate and a source, the seventh transistor Q7Is electrically connected to a second output terminal O/P2 of the processing unit 121, the seventh transistor Q7The source of the first transistor is electrically connected to the ground GND. The eighth transistor Q8Has an emitter, a base and a collector, the emitter being electrically connected to the first voltage output terminal OUT 1.
The eighth transistor Q8Through the third resistor R3Is electrically connected to the eighth transistor Q8The base of (1). The eighth transistor Q8Through the fourth resistor R4Is electrically connected to the seventh transistor Q7Of the substrate. The eighth transistor Q8Through the fifth resistor R5Is electrically connected to the voltage output terminal Vout. In the preferred embodiment, more specifically, the eighth transistor Q8Is through the fifth resistor R5Is electrically connected to the fourth transistor Q4Of the substrate.
And when the processing unit 121 determines the power output terminal VoutWhen the voltage value is smaller than the start threshold value, the processing unit 121 further generates a feedback current start signal to be outputted from the second output terminal O/P2 to control the seventh transistor Q7And the eighth transistor Q8And conducting.
When the processing unit 121 determines that the voltage value of the first voltage output terminal OUT1 is less than the turn-off threshold, the processing unit 121 further generates a feedback current turn-off signal to be output from the second output terminal O/P2 to control the seventh transistor Q7And the eighth transistor Q8And (5) disconnecting.
For example, when the electrical equipment is electrically connected to the power output terminal VoutWhen charging, the processing unit 121 generates the enable signal to enable the fourth transistor Q4When turned on, the processing unit 121 further generates the feedback current enable signal to be outputted from the second output terminal O/P2 to the seventh transistor Q7A gate electrode of (1). The seventh transistor Q7Is turned on by receiving the feedback current enable signal to enable the eighth transistor Q8Is turned on, and the first voltage output terminal OUT1 can pass through the turned on eighth transistor Q8And the fifth resistor R5Is connected to the fourth transistor Q4And a feedback current is generated through the fourth transistor Q4And charging the electrical equipment.
However, when the electrical device is removed, the feedback current cannot be continuously outputted to the power output terminal VoutTherefore, the feedback current is fed back to the second voltage output terminal OUT 2. As described above, the feedback current fed back to the second voltage output terminal OUT2 causes the second voltage output by the second voltage output terminal OUT2 to exceed the threshold value, and the control unit 115 of the power converter 11 stops outputting the control signal, so that the voltage of the first voltage output terminal OUT1 starts to decrease below the off threshold value.
In addition, when the electrical device is removed, the processing unit 121 generates the turn-off signal to enable the fourth transistor Q4Out of the cut-off state, theThe processing unit 121 further generates the feedback current off signal from the second output terminal O/P2 to the seventh transistor Q7A gate electrode of (1). The seventh transistor Q7Is turned off by receiving the feedback current off signal to turn off the eighth transistor Q8And then the feedback current is stopped generating.
By further providing the feedback current generating circuit 127, the current fed back to the second voltage output terminal OUT2 can be increased when the electrical equipment is removed, and the determination time of the control unit 115 of the power converter 11 suspending outputting the control signal can be shortened, thereby improving the working efficiency.
Referring to fig. 6, a fifth preferred embodiment of the power supply apparatus with electronic circuit breaker is substantially the same as the fourth preferred embodiment, wherein the difference is that the eighth transistor Q of the feedback current generating circuit 127 of the electronic circuit breaker 128Is through the fifth resistor R5Is electrically connected to the fourth transistor Q4Of the substrate.
Further, in the first to fifth preferred embodiments of the power supply apparatus with electronic circuit breaker, after the processing unit 121 generates the start signal and outputs the start signal from the first output terminal O/P1, the processing unit 121 further determines the power output terminal VoutIs less than a short circuit threshold.
When the processing unit 121 determines the power output terminal VoutWhen the voltage value is smaller than the short-circuit threshold value, the processing unit 121 generates the close signal to be outputted from the first output terminal O/P1 to control the electronic switch 122 to be turned off, and the processing unit 121 further determines that the power output terminal V is connected to the power supplyoutWhether the voltage value is larger than a standby critical value or not; when the processing unit 121 determines the power output terminal VoutWhen the voltage value is greater than the standby threshold value, the processing unit 121 executes the standby mode again.
When the processing unit 121 determines the power output terminal VoutWhen the voltage value is not less than the short-circuit threshold value, the processing unit 121 starts to determine the voltage value of the first voltage output terminal OUT1If the value is smaller than the closing threshold, the subsequent actuation principle is as described above, and will not be described herein again.
When the user accidentally touches the exposed power output end VoutResult in the power supply output terminal VoutWhen short-circuited with the ground terminal GND, the power supply output terminal VoutThe voltage value of the first voltage is equal to the ground GND, which is 0 v. However, when the power supply output terminal V is connectedoutWhen the short circuit with the ground GND occurs, the processing unit 121 will determine the power output terminal VoutIs less than the start threshold value, and further generates the start signal to control the electronic switch to be conducted. But at this time, the electrical equipment is not connected with the power output end VoutThe charging is required, and the situation is an erroneous starting state caused by the user touching the battery by mistake.
Therefore, to avoid such false activation condition, when the processing unit 121 determines the power output VoutThe processing unit 121 further determines the power output terminal V after the voltage value is smaller than the start threshold value to generate the start signaloutIs still less than the short circuit threshold. And when the processing unit 121 determines the power output terminal VoutWhen the short-circuit threshold is less than the short-circuit threshold, it represents that the activation is currently in an erroneous state, so the processing unit 121 generates the turn-off signal to turn off the electronic switch 122. When the processing unit 121 determines the power output terminal VoutWhen the current state is smaller than the starting critical value and larger than the short-circuit critical value, the current state is a normal starting state.
In addition, when the processing unit 121 determines the power output terminal VoutWhen the short-circuit threshold is smaller than the short-circuit threshold and the turn-off signal is generated to turn off the electronic switch 122, the processing unit 121 further determines whether the short-circuit state has been released. Therefore, when the processing unit 121 determines the power output terminal VoutWhen the short-circuit threshold is smaller than the short-circuit threshold and the turn-off signal is generated to turn off the electronic switch 122, the processing unit 121 further determines the power output terminal VoutIs greater than the standby threshold. When the power supply output end VoutVoltage value ofIf the threshold value is greater than the standby threshold value, the short-circuit state is released, and the processing unit 121 can execute the standby mode again. In the preferred embodiment, the standby threshold is greater than the short-circuit threshold.
Further, as shown in fig. 6, the first voltage dividing circuit 123 of the electronic circuit breaker 12 of the power supply apparatus with electronic circuit breaker includes a sixth resistor R6And a seventh resistor R7. The first voltage output terminal OUT1 passes through the sixth resistor R6Is electrically connected to the first input terminal I/P1 of the processing unit 121. The first input terminal I/P1 of the processing unit 121 passes through the seventh resistor R7Is electrically connected to the ground GND.
The second voltage dividing circuit 124 of the electronic circuit breaker 12 includes an eighth resistor R8And a ninth resistor R9. The second voltage output terminal OUT2 passes through the eighth resistor R8Is electrically connected to the second input terminal I/P2 of the processing unit 121. The second input terminal I/P2 of the processing unit 121 passes through the ninth resistor R9Is electrically connected to the ground GND.
The third voltage dividing circuit 125 of the electronic circuit breaker 12 includes a tenth resistor R10An eleventh resistor R11And a twelfth resistor R12. The second voltage output terminal OUT2 passes through the tenth resistor R10Is electrically connected to the power output terminal Vout. The power supply output end VoutThrough an eleventh resistor R11Is electrically connected to the third input terminal I/P3 of the processing unit 121. The third input terminal I/P3 of the processing unit 121 passes through the twelfth resistor R12Is electrically connected to the ground GND.
The switch circuit 126 of the electronic circuit breaker 12 further includes a thirteenth resistor R13A fourteenth resistor R14A fifteenth resistor R15A sixteenth resistor R16A seventeenth resistor R17And an eighteenth resistor R18。
The first transistor Q1Through the thirteenth resistor R13Is electrically connected to the first output terminal O/P1 of the processing unit 121. The first transistorQ1Is passed through the fourteenth resistor R14Is electrically connected to the ground GND. The second transistor Q2Through the fifteenth resistor R15Is electrically connected to the first transistor Q1Of the substrate. The second transistor Q2Through the sixteenth resistor R16Is electrically connected to the second transistor Q2An emitter of (1). The second transistor Q2The collector of (2) is connected to the seventeenth resistor R17Is electrically connected to the third transistor Q3The base of (1). The sixth transistor Q6Through the eighteenth resistor R18Is electrically connected to the third transistor Q3The base of (1).
The feedback current generating circuit 127 of the electronic circuit breaker 12 further includes a nineteenth resistor R19A twentieth resistor R20And a second resistor R21. A power supply terminal VDD of the processing unit 121 passes through the nineteenth resistor R19Is electrically connected to the second output terminal O/P2 of the processing unit 121. The second output terminal O/P2 of the processing unit 121 passes through the twentieth resistor R20Is electrically connected to the seventh transistor Q7A gate electrode of (1). The seventh transistor Q7Is passed through the second resistor R21Is electrically connected to the seventh transistor Q7Of the substrate.
Referring to fig. 7 and 8, the power supply apparatus with electronic circuit breaker further includes a standby power controller 13. The standby power controller 13 is connected between the power converter 11 and the electronic circuit breaker 12. The electronic switch 122 of the electronic circuit breaker 12 is connected to the second voltage output terminal OUT2 of the power converter 11 through the standby power controller 13. The first input terminal I/P1 of the processing unit 121 of the electronic circuit breaker 12 is connected to the first voltage output terminal OUT1 of the power converter 11 through the standby power controller 13. The second input terminal I/P2 of the processing unit 121 of the electronic circuit breaker 12 is directly connected to the second voltage output terminal OUT1 of the power converter 11. When the power supply output end VoutWhen the voltage value is greater than the starting threshold value, the standby power controller 13 disconnects the power converter 11 from the electronic circuit breaker12 are connected. Further, when the standby power controller 13 is connected between the power converter 11 and the electronic circuit breaker 12, only the second input terminal I/P2 of the processing unit 121 of the electronic circuit breaker 12 is directly connected to the second voltage output terminal OUT1 of the power converter 11.
The standby power controller 13 includes a ninth transistor Q9A tenth transistor Q10An eleventh transistor Q11A switch unit U1A Zener diode ZD, a first diode D1A second diode D2A third diode D3A fourth diode D4A second capacitor C2A second resistor R22A second and third resistor R23A second and a fourth resistor R24A second fifth resistor R25A second six resistor R26A second seventh resistor R27And a second eighth resistor R28。
The ninth transistor Q9Has an emitter, a base and a collector. The ninth transistor Q9Is electrically connected to the first voltage output terminal OUT1, the ninth transistor Q9Is electrically connected to the first input I/P1 of the processing unit 121 of the electronic circuit breaker 12. The tenth transistor Q10Has an emitter, a base and a collector. The ten transistors Q10Is electrically connected to the second voltage output terminal OUT2, the tenth transistor Q10Is electrically connected to the electronic switch 122 of the electronic circuit breaker 12.
The eleventh transistor Q11Having a drain, a gate and a source, the eleventh transistor Q11The source of the first transistor is electrically connected to the ground GND.
The power supply output end VoutThrough the second resistor R22Is electrically connected to the switch unit U1A control terminal of (1). The switch unit U1The control terminal is electrically connected to the ground terminal GND through the zener diode ZD.
The second voltage output terminal OUT2 passes through the second third resistor R23And the switch unit U1Is electrically connected to the ground GND, and the second voltage output terminal OUT2 passes through the second third resistor R23And the fourth diode D4Is electrically connected to the eleventh transistor Q11A gate electrode of (1).
The first output terminal O/P1 passes through the third diode D3Is electrically connected to the eleventh transistor Q11A gate electrode of (1). The second eight resistor R28Is electrically connected to the eleventh transistor Q11And the eleventh transistor Q11Between the source electrodes of (1).
The ninth transistor Q9Through the second four resistors R24Is electrically connected to the ninth transistor Q9The base of (1). The ninth transistor Q9Through the second five resistors R25And the first diode D1Is electrically connected to the eleventh transistor Q11Of the substrate.
The tenth transistor Q10Through the second six resistors R26Is electrically connected to the tenth transistor Q10The base of (1). The tenth transistor Q10Through the second seventh resistor R27And the second diode D2Is electrically connected to the eleventh transistor Q11Of the substrate.
The second voltage output terminal OUT2 passes through the second capacitor C2Is electrically connected to the ground GND.
When the electrical equipment is not electrically connected to the power output end VoutWhen charging, the power output end VoutThe voltage value of (a) is maintained at a state greater than the activation threshold value. So that the power supply output terminal VoutThe output voltage can pass through the second resistor R22To the switch unit U1The control terminal of the switch unit U1Maintain the eleventh transistor Q in a conducting state11The gate of the eleventh transistor Q is grounded11Is maintained in the off state. Further, when the eleventh transistor Q11When the ninth transistor Q is maintained in the OFF state9And the tenth transistor Q10The base of the second transistor cannot be grounded, thereby making the ninth transistorQ9And the tenth transistor Q10Also maintained in the off state.
At this time, since the ninth transistor Q9And the tenth transistor Q10Are both in the off state, the first voltage output terminal OUT1 and the second voltage output terminal OUT2 cannot pass through the ninth transistor Q9And the tenth transistor Q10Is connected to the electronic circuit breaker 12, so that the electronic circuit breaker 12 cannot receive the power output by the power converter 11, thereby reducing the standby power consumption of the electronic circuit breaker 12.
However, when the electrical device is initially electrically connected to the power output terminal VoutWhen the power supply output end V is connected to the power supplyoutWill decrease the voltage value of the switch unit U1The voltage value of the control terminal is reduced to ensure that the switch unit U1And becomes an off state. When the switch unit U1When the second voltage output terminal OUT2 is turned off, the second voltage output terminal OUT2 passes through the second resistor R23The fourth diode D4And the second eight resistor R28Form a loop to generate current to make the eleventh transistor Q11And conducting. When the eleventh transistor Q11When turned on, the ninth transistor Q9And the tenth transistor Q10Will also be conductive.
At this time, since the ninth transistor Q9And the tenth transistor Q10In the on state, the first voltage output terminal OUT1 and the second voltage output terminal OUT2 can be connected to the electronic circuit breaker 12, so that the electronic circuit breaker 12 receives the power outputted by the power converter 11 and operates normally.
In addition, when the electrical equipment is electrically connected to the power output end VoutWhen charging, the power output end VoutWill be the same as the voltage value of the second voltage output terminal OUT2, i.e. the switching unit U1It will be turned on. But when the electrical device is electrically connected to the power output terminal VoutWhen charging, the first output terminal O/P of the processing unit 121 of the electronic circuit breaker 12 outputs the start signal, and the first output terminal O/P of the processing unit 121 is turned onThrough the third diode D3Is electrically connected to the eleventh transistor Q11A gate electrode of (1). Thus, the eleventh transistor Q11The power output from the power converter 11 can be continuously passed through the turned-on ninth transistor Q by the start signal output from the first output terminal O/P of the processing unit 121 being maintained in the turned-on state9And the tenth transistor Q10And output to the electronic circuit breaker 12 to maintain normal operation.
Further, referring to fig. 9, the control method of the power supply apparatus with the electronic circuit breaker is executed by the electronic circuit breaker 13, and the first preferred embodiment of the control method includes the following steps:
receives the first voltage outputted from the first voltage output terminal OUT1 and the second voltage outputted from the second voltage output terminal OUT2 of the power converter 11, and receives the power output terminal VoutThe output voltage of (S901); wherein the power converter 11 is feedback-controlled according to the second voltage output from the second voltage output terminal OUT 2;
executing the standby mode (S902);
judging the power output end VoutWhether the voltage value of the output voltage is less than the start-up threshold value (S903);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the start threshold value, the start signal is generated to make the second voltage output terminal OUT2 switch on the power output terminal Vout(S904)；
Determining whether the voltage value of the first voltage at the first voltage output terminal OUT1 is less than a turn-off threshold (S905);
when the voltage value of the first voltage at the first voltage output terminal OUT1 is less than the turn-off threshold, a turn-off signal is generated to make the second voltage output terminal OUT2 and the power output terminal VoutIs turned off (S906), and the standby mode is re-executed (S902).
Referring to fig. 10, a second preferred embodiment of the control method includes the following steps:
receives the output of the first voltage output terminal OUT1 of the power converter 11And a second voltage output by a second voltage output terminal OUT2, and receives the power output terminal VoutThe output voltage of (S1001); wherein the power converter 11 is feedback-controlled according to the second voltage output from the second voltage output terminal OUT 2;
executing the standby mode (S1002);
judging the power output end VoutWhether the voltage value of the output voltage is less than the start-up threshold value (S1003);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the start threshold value, the start signal is generated to make the second voltage output terminal OUT2 switch on the power output terminal Vout(S1004)；
When the power supply output end VoutWhen the voltage value of the output voltage is smaller than the starting critical value, the feedback current starting signal is further generated to generate a feedback current to be output to the power output end Vout(S1005)；
Determining whether the voltage value of the first voltage at the first voltage output terminal OUT1 is less than the turn-off threshold (S1006);
when the voltage value of the first voltage at the first voltage output terminal OUT1 is smaller than the turn-off threshold, the feedback current turn-off signal is generated to stop generating the feedback current (S1007), and the turn-off signal is generated to connect the second voltage output terminal OUT2 and the power output terminal VoutDisconnecting (S1008);
the standby mode is re-executed (S1002).
Referring to fig. 11, a third preferred embodiment of the control method includes the following steps:
receives the first voltage outputted from the first voltage output terminal OUT1 and the second voltage outputted from the second voltage output terminal OUT2 of the power converter 11, and receives the power output terminal VoutThe output voltage of (S1101); wherein the power converter 11 is feedback-controlled according to the second voltage output from the second voltage output terminal OUT 2;
executing the standby mode (S1102);
judging the power output end VoutWhether the voltage value of the output voltage is less than the start-up threshold value (S1103);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the start threshold value, the start signal is generated to make the second voltage output terminal OUT2 switch on the power output terminal Vout(S1104)；
Judging the power output end VoutWhether the voltage value of the output voltage of (1) is less than the short-circuit critical value (S1105);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the short-circuit threshold value, the turn-off signal is generated to make the second voltage output terminal OUT2 and the power output terminal VoutDisconnecting (S1106), and further determining the power output terminal VoutWhether the voltage value of the output voltage is greater than the standby critical value (S1107); when the power supply output end VoutWhen the voltage value of the output voltage is greater than the standby threshold value, re-executing the standby mode (S1102);
when the power supply output end VoutWhen the voltage value of the output voltage is not less than the short-circuit threshold, determining whether the voltage value of the first voltage output terminal OUT1 is less than the turn-off threshold (S1108);
when the voltage value of the first voltage at the first voltage output terminal OUT1 is less than the turn-off threshold, the turn-off signal is generated to make the second voltage output terminal OUT2 and the power output terminal VoutIs turned off (S1106), and the standby mode is re-executed (S1102).
Referring to fig. 12, a fourth preferred embodiment of the control method includes the following steps:
receives the first voltage outputted from the first voltage output terminal OUT1 and the second voltage outputted from the second voltage output terminal OUT2 of the power converter 11, and receives the power output terminal VoutThe output voltage of (S1201); wherein the power converter 11 is feedback-controlled according to the second voltage output from the second voltage output terminal OUT 2;
executing a standby mode (S1202);
judging the power output end VoutOutput voltage ofWhether the voltage value of (a) is less than the start threshold value (S1203);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the start threshold value, the start signal is generated to make the second voltage output terminal OUT2 switch on the power output terminal Vout(S1204)；
Delaying a first time (S1205);
judging the power output end VoutWhether the voltage value of the output voltage is less than the short-circuit threshold value (S1206);
when the power supply output end VoutWhen the voltage value of the output voltage is smaller than the short-circuit threshold value, the turn-off signal is generated to make the second voltage output terminal OUT2 and the power output terminal VoutDisconnecting (S1207), and further determining the power output terminal VoutWhether the voltage value of the output voltage is greater than a standby critical value (S1208); when the power supply output end VoutWhen the voltage value of the output voltage is larger than the standby threshold value, the standby mode is executed again (S1202);
when the power supply output end VoutWhen the voltage value of the output voltage is not less than the short-circuit threshold value, delaying a second time (S1209), and generating the feedback current start signal to generate a feedback current to be output to the power output terminal Vout(S1210) and determining whether the voltage value of the first voltage at the first voltage output terminal OUT1 is less than the turn-off threshold (S1211);
when the voltage value of the first voltage at the first voltage output terminal OUT1 is less than the turn-off threshold, the feedback current turn-off signal is generated to stop generating the feedback current (S1212), and the turn-off signal is generated to connect the second voltage output terminal OUT2 and the power output terminal VoutDisconnecting (S1207), and further judging the power supply output end VoutWhether the voltage value of the output voltage is greater than the standby critical value (S1208); when the power supply output end VoutWhen the voltage value of the output voltage is greater than the standby threshold value, the standby mode is executed again (S1202).
In the preferred embodiment, the first time is 100 microseconds (μ s) and the second time is 2 milliseconds (ms).
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A power supply apparatus having an electronic circuit breaker, comprising:
a power supply output terminal;
a power converter having a first voltage output terminal and a second voltage output terminal; wherein the power converter performs feedback control according to the voltage output by the second voltage output terminal;
an electronic circuit breaker comprising:
the electronic switch is connected between the power supply output end and the second voltage output end and is provided with a control end so as to control the on-off of the electronic switch; a processing unit having a first input terminal, a second input terminal, a third input terminal and a first output terminal; the first input end and the second input end are respectively connected to the first voltage output end and the second voltage output end, and the third input end is connected with the power supply output end;
a switch circuit, the first output terminal of the processing unit is connected to the control terminal of the electronic switch through the switch circuit, the switch circuit includes:
a first transistor having a drain, a gate and a source, the gate being electrically connected to the first output terminal of the processing unit, the source being electrically connected to a ground terminal;
a second transistor having an emitter, a base and a collector, the emitter being electrically connected to the first voltage output terminal, the base being electrically connected to the drain of the first transistor;
a third transistor having an emitter, a base and a collector, wherein the collector of the third transistor is electrically connected to the first voltage output terminal, the base of the third transistor is electrically connected to the collector of the second transistor, and the emitter of the third transistor is electrically connected to the control terminal of the electronic switch;
the processing unit executes a standby mode and judges whether the voltage value of the power supply output end is smaller than a starting critical value; when the processing unit judges that the voltage value of the power output end is smaller than the starting critical value, the processing unit generates a starting signal to be output from the first output end to control the electronic switch to be conducted so as to switch on the second voltage output end and the power output end, and the processing unit further judges whether the voltage value of the first voltage output end of the power converter is smaller than a closing critical value or not; when the processing unit judges that the voltage value of the first voltage output end is smaller than the closing critical value, the processing unit generates a closing signal to be output from the first output end, controls the electronic switch to be switched off, and executes the standby mode again.
2. The power supply apparatus with electronic circuit breaker of claim 1, wherein the power converter further comprises:
the primary side loop unit is connected with a power supply for receiving electric energy;
a primary side coupling coil electrically connected to the primary side loop unit;
a first secondary side coupling coil coupled to the primary side coupling coil and connected to the first voltage output terminal to output a first voltage through the first voltage output terminal;
a second secondary side coupling coil coupled to the primary side coupling coil and connected to the second voltage output terminal to output a second voltage through the second voltage output terminal; the number of turns of the first secondary side coupling coil is greater than that of the second secondary side coupling coil;
and the control unit is electrically connected to the second secondary side coupling coil and the primary side loop unit and generates a control signal to control the primary side loop unit according to a second voltage output by the second secondary side coupling coil.
3. The power supply apparatus having an electronic circuit breaker according to claim 2, wherein the electronic switch comprises:
a fourth transistor having a drain, a gate and a source, the drain of the fourth transistor being electrically connected to the second voltage output terminal, the gate of the fourth transistor being electrically connected to the emitter of the third transistor, the source of the fourth transistor being electrically connected to the power output terminal; wherein the gate of the fourth transistor is the control terminal of the electronic switch;
and the first resistor is electrically connected between the grid electrode of the fourth transistor and the source electrode of the fourth transistor.
4. The power supply apparatus of claim 3, wherein the electronic circuit breaker further comprises a feedback current generating circuit, and the feedback current generating circuit comprises:
a seventh transistor having a drain, a gate and a source, the gate of the seventh transistor being electrically connected to a second output terminal of the processing unit, the source of the seventh transistor being electrically connected to the ground terminal;
an eighth transistor having an emitter, a base, and a collector, wherein the emitter of the eighth transistor is electrically connected to the first voltage output terminal, the base of the eighth transistor is electrically connected to the drain of the seventh transistor, and the collector of the eighth transistor is electrically connected to the power output terminal through a fifth resistor;
when the processing unit judges that the voltage value of the power output end is smaller than the starting critical value, the processing unit further generates a feedback current starting signal to be output from the second output end to control the seventh transistor and the eighth transistor to be conducted;
when the processing unit judges that the voltage value of the first voltage output end is smaller than the closing critical value, the processing unit further generates a feedback current closing signal to be output from the second output end, and the seventh transistor and the eighth transistor are controlled to be switched off.
5. The power supply apparatus with an electronic circuit breaker as claimed in any one of claims 1 to 4, further comprising a standby power controller, characterized in that:
the electronic switch is connected to the second voltage output end of the power converter through the standby power controller, and the standby power controller is further connected to the power output end;
the first input end of the processing unit of the electronic circuit breaker is connected to the first voltage output end of the power converter through the standby power controller;
the second input of the processing unit of the electronic circuit breaker is directly connected to the second voltage output of the power converter;
when the voltage value of the power supply output end is larger than the starting critical value, the standby power supply controller disconnects the power supply converter from the electronic circuit breaker.
6. The power supply apparatus having an electronic circuit breaker according to claim 5, wherein the standby power controller comprises:
a ninth transistor having an emitter, a base, and a collector, the emitter of the ninth transistor being electrically connected to the first voltage output terminal, the collector of the ninth transistor being electrically connected to the first input terminal of the processing unit of the electronic circuit breaker;
a tenth transistor having an emitter, a base, and a collector, the emitter of the tenth transistor being electrically connected to the second voltage output terminal, the collector of the tenth transistor being electrically connected to the electronic switch;
an eleventh transistor having a drain, a gate, and a source, the drain of the eleventh transistor being electrically connected to the base of the ninth transistor and the base of the tenth transistor, the source of the eleventh transistor being electrically connected to ground;
the switch unit is connected between the second voltage output end and the grounding end and is provided with a control end for controlling the on-off of the switch unit; wherein the power output terminal is electrically connected to the control terminal of the switch unit; wherein a gate of the eleventh transistor is electrically connected to a connection node of the switching unit and the second voltage output terminal, and is electrically connected to the first input terminal of the processing unit of the electronic circuit breaker.
7. A control method of power supply equipment with an electronic circuit breaker is characterized in that the control method is executed by the electronic circuit breaker and comprises the following steps:
receiving a first voltage output by a first voltage output end and a second voltage output by a second voltage output end of a power converter; the power converter performs feedback control according to the second voltage output by the second voltage output end;
receiving an output voltage of a power supply output end;
executing a standby mode;
judging whether the voltage value of the output voltage of the power supply output end is smaller than a starting critical value or not;
when the voltage value of the output voltage of the power supply output end is smaller than the starting critical value, a starting signal is generated, the second voltage output end is connected with the power supply output end, and a feedback current starting signal is further generated to generate a feedback current to be output to the power supply output end;
judging whether the voltage value of the first voltage at the first voltage output end is smaller than a closing critical value;
when the voltage value of the first voltage output end is smaller than the closing critical value, a closing signal is generated, the second voltage output end is disconnected with the power output end, the standby mode is executed again, and a feedback current closing signal is further generated to stop generating the feedback current.
8. The control method of a power supply apparatus having an electronic circuit breaker according to claim 7, characterized in that:
after the starting signal is generated, further judging whether the voltage value of the output voltage of the power supply output end is smaller than a short-circuit critical value;
when the voltage value of the output voltage of the power supply output end is smaller than the short-circuit critical value, the closing signal is generated, the second voltage output end is disconnected with the power supply output end, and whether the voltage value of the output voltage of the power supply output end is larger than a standby critical value or not is further judged; when the voltage value of the power supply output end is larger than the standby critical value, the standby mode is executed again;
when the voltage value of the output voltage of the power supply output end is not smaller than the short-circuit critical value, whether the voltage value of the first voltage output end is smaller than the closing critical value is judged.
CN201810777087.1A 2018-07-16 2018-07-16 Power supply apparatus having electronic circuit breaker and control method thereof Active CN110727303B (en)

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US8416584B2 (en) * 2009-10-30 2013-04-09 Intersil Americas Inc. Power supply with low power consumption hiccup standby operation
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