CN109861217B - Novel chip power supply circuit - Google Patents
Novel chip power supply circuit Download PDFInfo
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- CN109861217B CN109861217B CN201910189360.3A CN201910189360A CN109861217B CN 109861217 B CN109861217 B CN 109861217B CN 201910189360 A CN201910189360 A CN 201910189360A CN 109861217 B CN109861217 B CN 109861217B
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- 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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Abstract
The invention provides a novel chip power supply circuit, which comprises: the current limiting capacitor, the current limiting resistor, the rectifier diode, the energy storage filter capacitor and the MOS tube; one end of the current-limiting capacitor is connected with the drain electrode of the MOS tube, and the other end of the current-limiting capacitor is connected with one end of the current-limiting resistor; the positive pole of the rectifier diode is connected with the other end of the current-limiting resistor, and the negative pole of the rectifier diode is connected with the VCC end of the chip IC; the anode of the rectifier diode is grounded, and the cathode of the rectifier diode is connected with the anode of the rectifier diode; one end of the energy storage filter capacitor is connected with the VCC end of the chip IC, and the other end of the energy storage filter capacitor is grounded; the OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube. The method has the advantages of less loss, no need of secondary windings of the transformer, improved product efficiency, reduced winding process of the transformer, cost saving and high engineering applicability.
Description
Technical Field
The invention relates to a novel chip power supply circuit.
Background
Fig. 1 is a circuit diagram of a conventional auxiliary winding power supply and resistance-based bus power supply circuit.
As shown in fig. 1, the resistors 11 and 12 and the capacitor 15 in the figure form a bus-bar power supply circuit, but such a power supply circuit has the disadvantage that the value of the resistor cannot be too large when the power supply circuit is operated at a full input voltage, but the loss of the resistor is high when a high voltage is input.
The secondary winding 16 of the transformer, the diode 13, the resistors 11, 12 and 14 and the capacitor 15 form a secondary winding power supply circuit, and the resistors 11 and 12 can be used as starting resistors in the circuit, so that the problem of high voltage loss is avoided. The disadvantage of this circuit is that the secondary winding 16 of the transformer is added, the winding process becomes complicated, and the bobbin window volume requirement is larger due to the addition of the secondary winding, which increases the cost accordingly.
Disclosure of Invention
The invention provides a novel chip power supply circuit, which replaces the traditional auxiliary winding power supply and a circuit for taking power on a bus by using a resistor through taking power from a drain electrode of an MOS (metal oxide semiconductor); compared with a resistance bus, the power-taking loss is smaller, a secondary winding of the transformer is not needed, the product efficiency is improved, the winding process of the transformer is reduced, the cost is saved, and the engineering applicability is very high; thereby overcoming the defects of the prior art and solving the technical problems.
The invention provides a novel chip power supply circuit, which comprises: a current-limiting capacitor 101, a current-limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy-storage filter capacitor 105 and an MOS (metal oxide semiconductor) tube 106; one end of the current-limiting capacitor 101 is connected with the drain of the MOS tube, and the other end is connected with one end of the current-limiting resistor 102; the anode of the rectifier diode 103 is connected with the other end of the current-limiting resistor 102, and the cathode is connected with the VCC end of the chip IC; the anode of the rectifier diode 104 is grounded, and the cathode is connected with the anode of the rectifier diode 103; one end of the energy storage filter capacitor 105 is connected with the VCC end of the chip IC, and the other end is grounded; the OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: also included is a resistor 107; one end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: the device also comprises an alternating current power supply AC and a rectifier bridge; the input end of the rectifier bridge is connected with an alternating current power supply AC; one output end of the rectifier bridge is connected with the HV end of the chip IC, and the other output end of the rectifier bridge is grounded.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: the device also comprises an alternating current power supply AC, a rectifier bridge, a resistor 108 and a resistor 109; the input end of the rectifier bridge is connected with an alternating current power supply AC; one output end of the rectifier bridge is connected with one end of the resistor 108, and the other output end is grounded; one end of the resistor 109 is connected to the other end of the resistor 108, and the other end is connected to the VCC end of the chip IC.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: also includes an inductor 205, a diode 206 and a capacitor 207; one end of the inductor 205 is connected with one output end of the rectifier bridge, and the other end is connected with the drain electrode of the MOS tube 106; the anode of the diode 206 is connected with the drain of the MOS transistor 106, and the other end is connected with one end of the capacitor 207; the other terminal of the capacitor 207 is grounded.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: also includes diode 305, LED string 306 and inductance 307; the anode of the diode 305 is connected with the drain of the MOS transistor 106, and the cathode is connected with one output end of the rectifier bridge; the anode of the LED lamp string 306 is connected with one output end of the rectifier bridge, and the cathode is connected with one end of the inductor 307; the other end of the inductor 307 is connected to the drain of the MOS transistor 106.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: the LED lamp also comprises a mutual inductor 405, a diode 406, an LED lamp string 407 and a capacitor 408; one end of an inductor of the transformer 405 is connected with one input end of the rectifier bridge, and the other end of the inductor is connected with the drain electrode of the MOS tube 106; one end of the other inductor is connected with the anode of the diode 406, and the other end is connected with the cathode of the LED lamp string 407; the cathode of the diode 406 is connected with the anode of the LED lamp string 207; one end of the capacitor 408 is connected to the anode of the LED string 207, and the other end is connected to the cathode of the LED string 207.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: the rectifier bridge is composed of a diode 201, a diode 202, a diode 203, and a diode 204.
Further, the invention provides a novel chip power supply circuit, which is also characterized in that: the GND terminal of the chip IC is grounded.
The invention provides a novel chip power supply circuit, which has higher efficiency compared with the traditional resistance bus electricity taking circuit; compared with the auxiliary winding for power supply, the invention can save the auxiliary winding, reduce the process difficulty of the transformer, improve the utilization rate of the transformer window and reduce the cost.
Drawings
Fig. 1 is a circuit diagram of a conventional auxiliary winding power supply and resistance-based bus power supply circuit.
Fig. 2 is a circuit diagram of a power supply circuit of the novel chip in the first embodiment.
Fig. 3 is a power supply circuit diagram of the novel chip in the second embodiment.
Fig. 4 is a power supply circuit diagram of the novel chip in the third embodiment.
Fig. 5 is a power supply circuit diagram of the novel chip in the fourth embodiment.
The specific implementation mode is as follows:
the invention is described in further detail below with reference to the figures and the detailed description.
Example one
Fig. 2 is a circuit diagram of a power supply circuit of the novel chip according to the first embodiment.
As shown in fig. 2, the novel chip power supply circuit includes: the circuit comprises an alternating current power supply AC, a rectifier bridge, a current-limiting capacitor 101, a current-limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy storage filter capacitor 105, a MOS tube 106, a resistor 107, an inductor 205, a diode 206 and a capacitor 207.
The chip IC driven in the embodiment is provided with a VCC end, a HV end, an OUT end and a GND end, wherein the VCC end is a power supply voltage input end of the chip IC, the HV end is a high-voltage driving end of the chip IC, and the OUT end outputs square wave voltage.
The rectifier bridge is composed of a diode 201, a diode 202, a diode 203 and a diode 204, and two input ends are connected with an alternating current power supply AC; the positive output end of the rectifier bridge is connected with the HV end of the chip IC, and the negative output end of the rectifier bridge is grounded. One end of the inductor 205 is connected to the positive output end of the rectifier bridge, and the other end is connected to the drain of the MOS transistor 106.
One end of the current-limiting capacitor 101 is connected to the drain of the MOS transistor, and the other end is connected to one end of the current-limiting resistor 102. The anode of the rectifier diode 103 is connected to the other end of the current-limiting resistor 102, and the cathode is connected to the VCC terminal of the chip IC. The anode of the rectifier diode 104 is grounded, and the cathode is connected with the anode of the rectifier diode 103. One end of the energy storage filter capacitor 105 is connected to the VCC terminal of the chip IC, and the other end is grounded. The OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106. One end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded. The GND terminal of the chip IC is grounded.
The anode of the diode 206 is connected to the drain of the MOS transistor 106, and the other end is connected to one end of the capacitor 207. The other terminal of the capacitor 207 is grounded.
When the chip IC is started (in this example, the chip IC is started by directly supplying the HV pin with high voltage), the gate of the MOS transistor 106 receives the square wave voltage output by the OUT of the chip IC, that is, the drain pin of the MOS transistor generates the square wave voltage, and the amplitude of the square wave voltage is equal to the voltage of the capacitor 207 plus the forward conduction voltage drop of the diode 206. The duty cycle and frequency of the square wave voltage depend on the overall system.
When the MOS transistor 106 is turned from on to off, the square wave voltage on the drain of the MOS transistor 106 is changed from low level to high level, and the high level charges the energy storage filter capacitor 105 through the current limiting capacitor 101, the current limiting resistor 102 and the rectifier diode 103.
When the MOS transistor 106 is turned on from off, the square wave voltage at the drain of the MOS transistor 106 is turned from high level to low level, the current-limiting capacitor 101 forms a discharge loop through the MOS transistor 106, the resistor 107, the rectifier diode 103, and the current-limiting resistor 102, and discharges the electricity on the capacitor 101. When the MOS 106 is turned off from on, the above charging process is repeated, so that a stable voltage is obtained on the capacitor 105 along with the variation of the drain level of the MOS 106, and the chip IC is supplied with a stable power.
Example two
Fig. 3 is a circuit diagram of a power supply circuit of the novel chip in the second embodiment.
As shown in fig. 3, in this embodiment, the novel chip power supply circuit includes: the LED lamp comprises an alternating current power supply AC, a rectifier bridge, a current-limiting capacitor 101, a current-limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy-storage filter capacitor 105, a MOS (metal oxide semiconductor) tube 106, a resistor 107, a diode 305, an LED lamp string 306 and an inductor 307.
The chip IC driven in the embodiment is provided with a VCC end, a HV end, an OUT end and a GND end, wherein the VCC end is a power supply voltage input end of the chip IC, the HV end is a high-voltage driving end of the chip IC, and the OUT end outputs square wave voltage.
Two input ends of the rectifier bridge are connected with an Alternating Current (AC) power supply; the positive output end of the rectifier bridge is connected with the HV end of the chip IC, and the negative output end of the rectifier bridge is grounded. The anode of the diode 305 is connected to the drain of the MOS transistor 106, and the cathode is connected to the positive output terminal of the rectifier bridge.
One end of the current-limiting capacitor 101 is connected to the drain of the MOS transistor, and the other end is connected to one end of the current-limiting resistor 102. The anode of the rectifier diode 103 is connected to the other end of the current-limiting resistor 102, and the cathode is connected to the VCC terminal of the chip IC. The anode of the rectifier diode 104 is grounded, and the cathode is connected to the anode of the rectifier diode 103. One end of the energy storage filter capacitor 105 is connected to the VCC terminal of the chip IC, and the other end is grounded. The OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106. One end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded. The GND terminal of the chip IC is grounded.
The anode of the LED string 306 is connected to the positive output end of the rectifier bridge, and the cathode is connected to one end of the inductor 307. The other end of the inductor 307 is connected to the drain of the MOS transistor 106.
EXAMPLE III
Fig. 4 is a circuit diagram of a power supply circuit of the novel chip in the third embodiment.
As shown in fig. 4, in this embodiment, the novel chip power supply circuit includes: the LED light source comprises an alternating current power supply AC, a rectifier bridge, a current limiting capacitor 101, a current limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy storage filter capacitor 105, a MOS tube 106, a resistor 107, a mutual inductor 405, a diode 406, an LED light string 407 and a capacitor 408.
The chip IC driven in the embodiment is provided with a VCC end, a HV end, an OUT end and a GND end, wherein the VCC end is a power supply voltage input end of the chip IC, the HV end is a high-voltage driving end of the chip IC, and the OUT end outputs square wave voltage.
Two input ends of the rectifier bridge are connected with an Alternating Current (AC) power supply; the positive output end of the rectifier bridge is connected with the HV end of the chip IC, and the negative output end of the rectifier bridge is grounded.
One end of the current-limiting capacitor 101 is connected to the drain of the MOS transistor, and the other end is connected to one end of the current-limiting resistor 102. The anode of the rectifier diode 103 is connected to the other end of the current-limiting resistor 102, and the cathode is connected to the VCC terminal of the chip IC. The anode of the rectifier diode 104 is grounded, and the cathode is connected to the anode of the rectifier diode 103. One end of the energy storage filter capacitor 105 is connected to the VCC terminal of the chip IC, and the other end is grounded. The OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106. One end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded. The GND terminal of the chip IC is grounded.
One end of an inductor of the transformer 405 is connected to the positive input end of the rectifier bridge, and the other end is connected to the drain of the MOS transistor 106. One end of the other inductor is connected with the anode of the diode 406, and the other end is connected with the cathode of the LED string 407. The cathode of the diode 406 is connected to the anode of the LED string 207. One end of the capacitor 408 is connected to the anode of the LED string 207, and the other end is connected to the cathode of the LED string 207.
Example four
Fig. 5 is a power supply circuit diagram of the novel chip in the fourth embodiment.
As shown in fig. 5, in this embodiment, the novel chip power supply circuit includes: the LED light source comprises an alternating current power supply AC, a rectifier bridge, a resistor 108, a resistor 109, a current limiting capacitor 101, a current limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy storage filter capacitor 105, a MOS tube 106, a resistor 107, a transformer 405, a diode 406, an LED light string 407 and a capacitor 408.
The chip IC in this embodiment has a VCC end, an OUT end and a GND end, the VCC end is a supply voltage input end of the chip IC, and the OUT end outputs square wave voltage.
Two input ends of the rectifier bridge are connected with an alternating current power supply AC. The positive output end of the rectifier bridge is connected with one end of the resistor 108, and the negative output end is grounded. One end of the resistor 109 is connected to the other end of the resistor 108, and the other end is connected to the VCC end of the chip IC.
One end of the current-limiting capacitor 101 is connected to the drain of the MOS transistor, and the other end is connected to one end of the current-limiting resistor 102. The anode of the rectifier diode 103 is connected to the other end of the current-limiting resistor 102, and the cathode is connected to the VCC terminal of the chip IC. The anode of the rectifier diode 104 is grounded, and the cathode is connected to the anode of the rectifier diode 103. One end of the energy storage filter capacitor 105 is connected to the VCC terminal of the chip IC, and the other end is grounded. The OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106. One end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded. The GND terminal of the chip IC is grounded.
One end of an inductor of the transformer 405 is connected to the positive input end of the rectifier bridge, and the other end is connected to the drain of the MOS transistor 106. One end of the other inductor is connected with the anode of the diode 406, and the other end is connected with the cathode of the LED string 407. The cathode of the diode 406 is connected to the anode of the LED string 207. One end of the capacitor 408 is connected to the anode of the LED string 207, and the other end is connected to the cathode of the LED string 207.
The difference between the third embodiment and the fourth embodiment is that the chip IC does not have an HV terminal or the HV terminal is not directly supplied with high voltage, and the chip IC can be stably supplied with power by supplying power to the VCC terminal through the resistor 108 and the resistor 109. The same manner can be adopted in the second embodiment and the third embodiment, and the power is supplied to the VCC terminal through the resistor without the high-voltage power supply of the HV terminal.
The novel chip power supply circuit provided by the invention can supply power to various chips, such as a chip ST6561, and the power supply circuit provided by the invention can be used for stably supplying power to the chips as long as the chips can output square wave voltage.
The preferred embodiments of the present invention are described in the specification, and the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the present invention. Those skilled in the art can obtain technical solutions through logical analysis, reasoning or limited experiments according to the concepts of the present invention, and all such technical solutions are within the scope of the present invention.
Claims (8)
1. A novel chip power supply circuit is characterized in that: the current-limiting circuit comprises a current-limiting capacitor 101, a current-limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy-storage filter capacitor 105 and an MOS (metal oxide semiconductor) tube 106;
one end of the current-limiting capacitor 101 is connected to the drain of the MOS transistor, and the other end is connected to one end of the current-limiting resistor 102;
the anode of the rectifier diode 103 is connected with the other end of the current-limiting resistor 102, and the cathode is connected with the VCC end of the chip IC;
the anode of the rectifier diode 104 is grounded, and the cathode is connected with the anode of the rectifier diode 103;
one end of the energy storage filter capacitor 105 is connected with the VCC end of the chip IC, and the other end is grounded;
the OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106;
the device also comprises an alternating current power supply AC and a rectifier bridge; the input end of the rectifier bridge is connected with an Alternating Current (AC) power supply;
one output end of the rectifier bridge is connected with the HV end of the chip IC, and the other output end of the rectifier bridge is grounded.
2. A novel chip power supply circuit is characterized in that: the current-limiting circuit comprises a current-limiting capacitor 101, a current-limiting resistor 102, a rectifier diode 103, a rectifier diode 104, an energy-storage filter capacitor 105 and an MOS (metal oxide semiconductor) tube 106;
one end of the current-limiting capacitor 101 is connected with the drain of the MOS tube, and the other end is connected with one end of the current-limiting resistor 102;
the anode of the rectifier diode 103 is connected with the other end of the current-limiting resistor 102, and the cathode is connected with the VCC end of the chip IC;
the anode of the rectifier diode 104 is grounded, and the cathode is connected with the anode of the rectifier diode 103;
one end of the energy storage filter capacitor 105 is connected with the VCC end of the chip IC, and the other end is grounded;
the OUT end of the chip IC outputs square waves and is connected with the grid electrode of the MOS tube 106;
the device also comprises an alternating current power supply AC, a rectifier bridge, a resistor 108 and a resistor 109; the input end of the rectifier bridge is connected with an alternating current power supply AC;
one output end of the rectifier bridge is connected with one end of the resistor 108, and the other output end is grounded;
one end of the resistor 109 is connected to the other end of the resistor 108, and the other end is connected to the VCC end of the chip IC.
3. A novel chip power supply circuit as claimed in claim 1 or 2, characterized in that:
also included is a resistor 107; one end of the resistor 107 is connected to the source of the MOS transistor 106, and the other end is grounded.
4. A novel chip power supply circuit as claimed in claim 1 or 2, characterized in that:
also includes an inductor 205, a diode 206 and a capacitor 207;
one end of the inductor 205 is connected to one output end of the rectifier bridge, and the other end is connected to the drain of the MOS transistor 106;
the anode of the diode 206 is connected with the drain of the MOS transistor 106, and the other end is connected with one end of the capacitor 207;
the other terminal of the capacitor 207 is grounded.
5. A novel chip power supply circuit as claimed in claim 1 or 2, wherein:
further comprises a diode 305, an LED string 306 and an inductor 307;
wherein, the positive pole of the diode 305 connects the drain-source resistance of the MOS tube 106, the negative pole connects an carry-out terminal of the rectifier bridge;
the anode of the LED lamp string 306 is connected with one output end of the rectifier bridge, and the cathode is connected with one end of the inductor 307;
the other end of the inductor 307 is connected to the drain of the MOS transistor 106.
6. A novel chip power supply circuit as claimed in claim 1 or 2, characterized in that:
the LED lamp also comprises a mutual inductor 405, a diode 406, an LED lamp string 407 and a capacitor 408;
one end of an inductor of the transformer 405 is connected with one input end of the rectifier bridge, and the other end of the inductor is connected with the drain electrode of the MOS tube 106;
one end of the other inductor is connected with the anode of the diode 406, and the other end of the other inductor is connected with the cathode of the LED lamp string 407;
the cathode of the diode 406 is connected with the anode of the LED lamp string 207;
one end of the capacitor 408 is connected to the anode of the LED string 207, and the other end is connected to the cathode of the LED string 207.
7. A novel chip power supply circuit as claimed in claim 1 or 2, characterized in that:
the rectifier bridge is composed of a diode 201, a diode 202, a diode 203 and a diode 204.
8. A novel chip power supply circuit as claimed in claim 1 or 2, characterized in that:
the GND end of the chip IC is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910189360.3A CN109861217B (en) | 2019-03-13 | 2019-03-13 | Novel chip power supply circuit |
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| CN201910189360.3A CN109861217B (en) | 2019-03-13 | 2019-03-13 | Novel chip power supply circuit |
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| CN109861217B true CN109861217B (en) | 2022-08-19 |
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| CN110518787A (en) * | 2019-10-10 | 2019-11-29 | 上海源微电子科技有限公司 | A kind of flyback clamping protective circuit |
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| CN207442452U (en) * | 2017-10-21 | 2018-06-01 | 河南飞防兵科技有限公司 | A kind of intelligent industrial drive system of robot |
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| CN102695347A (en) * | 2011-03-22 | 2012-09-26 | 海洋王照明科技股份有限公司 | Power supply circuit for electronic ballast control chip |
| CN103763820A (en) * | 2014-01-02 | 2014-04-30 | 常熟银海集成电路有限公司 | Load sampling circuit of isolation-type LED drive circuit |
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| CN109861217A (en) | 2019-06-07 |
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