CN105826894A - Charging short-circuit protection device of power supply equipment and power supply equipment - Google Patents
Charging short-circuit protection device of power supply equipment and power supply equipment Download PDFInfo
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- CN105826894A CN105826894A CN201510364316.3A CN201510364316A CN105826894A CN 105826894 A CN105826894 A CN 105826894A CN 201510364316 A CN201510364316 A CN 201510364316A CN 105826894 A CN105826894 A CN 105826894A
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Abstract
The present invention provides a charging short-circuit protection device of power supply equipment and the power supply equipment. The charging short-circuit protection device comprises a voltage detection module which is connected to the data port of a power supply equipment USB interface and detects the voltage signal of the data port. The power supply equipment USB interface is connected to the power supply of the power supply equipment. A signal conversion module is connected to the voltage detection module. When the voltage signal is larger than a preset voltage signal, the signal conversion module converts the voltage signal into a control signal. The preset voltage signal is smaller than the voltage signal which triggers the power supply protection device of the power supply equipment. A driving module is connected to the signal conversion module and the power supply protection device and drives the power supply protection device to work according to the control signal. When the power supply protection device is working, the power supply stops power supply. According to the invention, when the short circuit of the USB interface is not sufficient to trigger the over-current protection and under-voltage protection of the power supply equipment, a USB connector is effectively protected.
Description
Technical field
The present invention relates to power technique fields, particularly relate to the charging short-circuit protection of a kind of power-supply device and a kind of power-supply device.
Background technology
Development along with individual's mobile device, use band USB (UniversalSerialBus, USB (universal serial bus)) mobile device is charged by the power-supply device that exports of interface (including USB connector), becomes main charging connection mode.And in order to use USB charging connection mode safely and reliably, it is desirable to USB interface is carried out short-circuit protection, to prevent USB interface short-circuit failure or to cause safety problem.
The short-circuit protection mode provided in correlation technique is mainly: at power-supply device (such as traveling charger) internal employing short-circuit protection; when the outfan of power-supply device has short circuit generation; and the output electric current at USB interface is when exceeding the short circuit current scope of regulation; power-supply device enters overcurrent protection state stream or under-voltage protection state; cut off output, thus protect USB connector and load.
But, the short-circuit protection mode provided in correlation technique there is also following defect:
When USB connector is internal or USB line internal short-circuit; but when the output electric current at power-supply device USB interface is in the range of the short circuit current of regulation; power-supply device can not enter overcurrent protection state or under-voltage protection state; exception will occur or safety problem occurs for final short dot, causes USB connector to lose efficacy.
Summary of the invention
Embodiment of the present invention technical problem to be solved is to provide the charging short-circuit protection of a kind of power-supply device; when being not enough to trigger power-supply device entrance overcurrent protection state or under-voltage protection state with short circuit current at power-supply device USB interface, USB connector etc. is effectively protected.
The embodiment of the present invention additionally provides a kind of power-supply device.
In order to solve the problems referred to above; the invention discloses the charging short-circuit protection of a kind of power-supply device; including: voltage detection module, described voltage detection module is connected with the FPDP of power-supply device USB interface, and described voltage detection module detects the voltage signal of described FPDP；Described power-supply device USB interface is connected with the power supply of power-supply device；Signal conversion module, described signal conversion module is connected with described voltage detection module, and when described voltage signal is more than predeterminated voltage signal, described voltage signal is converted to control signal by described signal conversion module；Described predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device；Driving module, described driving module is respectively connected with described signal conversion module and described apparatus for protecting power supply, and described driving module drives the work of described apparatus for protecting power supply according to described control signal；When described apparatus for protecting power supply works, described power supply is stopped power supply.
Preferably, in one embodiment of the invention, described voltage detection module includes: the first resistance, and one end of described first resistance is connected with the D-FPDP of power-supply device USB interface；First diode, the anode of described first diode is connected with the other end of described first resistance；Second resistance, one end of described second resistance is connected with the D+ FPDP of power-supply device USB interface；Second diode, the anode of described second diode is connected with the other end of described second resistance, and the negative electrode of described first diode and the negative electrode of described second diode are as the outfan of described voltage detection module.
Preferably, in one embodiment of the invention, described signal conversion module includes: voltage checking chip, and the input of described voltage checking chip is connected with the outfan of described voltage detection module, and the outfan of described voltage checking chip is as the outfan of described signal conversion module.
Preferably, in one embodiment of the invention, described voltage detection module also includes: the first stabilivolt, and the negative electrode of described first stabilivolt is connected with the other end of described first resistance, and the anode of described first stabilivolt is connected with the anode of described first diode；Second stabilivolt, the negative electrode of described second stabilivolt is connected with the other end of described second resistance, and the anode of described second stabilivolt is connected with the anode of described second diode.
Preferably, in one embodiment of the invention, described signal conversion module includes: power supply comparator, the reference power source end of described power supply comparator is connected with the outfan of described voltage detection module, the plus earth of described power supply comparator, the negative electrode of described power supply comparator is as the outfan of described signal conversion module.
Preferably, in one embodiment of the invention, the charging short-circuit protection of power-supply device also includes: filter circuit, and described filter circuit is respectively connected with the reference power source end of the outfan of described voltage detection module and described power supply comparator.
Preferably; in one embodiment of the invention; the charging short-circuit protection of power-supply device also includes: transient short-circuit protection module; described transient short-circuit protection module is connected with described FPDP; when transient short-circuit occurs in described FPDP, described FPDP is protected by described transient short-circuit protection module.
Preferably, in one embodiment of the invention, described transient short-circuit protection module includes: the 3rd stabilivolt, the described negative electrode of the 3rd stabilivolt is connected with the D-FPDP of power-supply device USB interface, the plus earth of described 3rd stabilivolt；4th stabilivolt, the described negative electrode of the 4th stabilivolt is connected with the D+ FPDP of power-supply device USB interface, the plus earth of described 4th stabilivolt.
Preferably; in one embodiment of the invention; described driving module includes: photoelectrical coupler; the anode of described photoelectrical coupler is connected with described power supply; the negative electrode of described photoelectrical coupler is connected with the outfan of described signal conversion module, and the colelctor electrode of described photoelectrical coupler is connected with described apparatus for protecting power supply.
Compared with correlation technique, the charging short-circuit protection of the power-supply device of the embodiment of the present invention includes advantages below:
By the voltage signal of FPDP in voltage detection module detection power-supply device USB interface, and then when voltage signal is more than predeterminated voltage signal (predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device), voltage signal is converted to control signal by signal conversion module, rear drive module drives apparatus for protecting power supply to work so that power supply is stopped power supply according to control signal, thus it is the most short-circuit at power-supply device USB interface, and short circuit current is not enough to trigger apparatus for protecting power supply (the such as overcurrent protective device of power-supply device, undervoltage protection device etc.) time, driving apparatus for protecting power supply works, power-supply device USB interface etc. is effectively protected；
When transient short-circuit occurring at power-supply device USB interface, by transient short-circuit protection module, FPDP is protected, thus prevent transient overvoltage from causing FPDP to lose efficacy.
In order to solve the problems referred to above, the invention also discloses a kind of power-supply device, including: power supply and apparatus for protecting power supply；When described apparatus for protecting power supply works, described power supply is stopped power supply；USB interface, described USB interface is connected with described power supply；The charging short-circuit protection of described power-supply device, the charging short-circuit protection of described power-supply device is respectively connected with described USB interface and described apparatus for protecting power supply.
Compared with correlation technique, the power-supply device of the embodiment of the present invention includes advantages below:
By the voltage signal of FPDP in the charging short-circuit protection detection power-supply device USB interface of power-supply device, and then when voltage signal is more than predeterminated voltage signal (predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device), voltage signal is converted to control signal, apparatus for protecting power supply is driven to work so that power supply is stopped power supply finally according to control signal, thus at USB interface for a long time short circuit (such as USB connector internal short-circuit, USB line internal short-circuit), and short circuit current is not enough to trigger apparatus for protecting power supply (the such as overcurrent protective device of power-supply device, undervoltage protection device etc.) time, USB interface etc. is effectively protected, there is higher safety；
When transient short-circuit occurring by the charging short-circuit protection of power-supply device at power-supply device USB interface, FPDP is protected against transient overvoltage and causes FPDP etc. to lose efficacy, good reliability.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the charging short-circuit protection embodiment of a kind of power-supply device of the present invention；
Fig. 2 is the structured flowchart of the charging short-circuit protection specific embodiment of a kind of power-supply device of the present invention；
Fig. 3 be a kind of power-supply device of the present invention charging short-circuit protection specific embodiment when power-supply device be structural representation during fast charge equipment；
Fig. 4 be the another kind of power-supply device of the present invention charging short-circuit protection specific embodiment when power-supply device be structural representation during fast charge equipment；
Fig. 5 is the structured flowchart of a kind of power-supply device embodiment of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, the present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
One of core idea of the embodiment of the present invention is; short circuit (such as USB connector internal short-circuit, USB line internal short-circuit) for a long time at power-supply device USB interface; and short circuit current be not enough to trigger overcurrent protective device, undervoltage protection device etc. time; trigger the work such as overcurrent protective device, undervoltage protection device, so that USB connector to be protected.
With reference to Fig. 1, it is shown that the charging short-circuit protection 1 of a kind of power-supply device that the embodiment of the present invention provides, specifically can include such as lower module: voltage detection module 11, signal conversion module 12 and driving module 13.Wherein, voltage detection module 11 is connected with the FPDP 21 of power-supply device USB interface 2, and voltage detection module 11 detects the voltage signal of FPDP 21, and power-supply device USB interface 2 is connected with the power supply 3 of power-supply device 10.Signal conversion module 12 is connected with voltage detection module 11, and when voltage signal is more than predeterminated voltage signal, voltage signal is converted to control signal by signal conversion module 12, and predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply 4 triggering power-supply device 10.Driving module 13 to be respectively connected with signal conversion module 12 and apparatus for protecting power supply 4, drive module 13 to drive apparatus for protecting power supply 4 to work according to control signal, when apparatus for protecting power supply 4 works, power supply 3 is stopped power supply.
Wherein, in one particular embodiment of the present invention; with reference to Fig. 2; apparatus for protecting power supply 4 is connected with Switching Power Supply primary 5; power supply 3 is connected with power-supply device 10 breaker in middle power supply secondary 6, and when apparatus for protecting power supply 4 works, Switching Power Supply primary 5 disconnects with power supply (such as 220V civil power); switch power supply secondary 6 power-off, power supply 3 is stopped power supply.
With reference to Fig. 2, power-supply device USB interface 2 can be connected with the USB interface 8 of mobile device 20 (such as mobile phone, palm PC etc.) by USB line 7, thus power-supply device 10 charges for mobile device 20.Wherein, power-supply device 10 can be common charger (such as output voltage is the charger etc. of 5V) or fast charge equipment (such as output voltage is the charger etc. of 9V or 12V).
With reference to Fig. 3, it is shown that charging short-circuit protection 1 specific embodiment of a kind of power-supply device of the present invention when power-supply device 10 be structural representation during fast charge equipment.As it is shown on figure 3, voltage detection module 11 can include the first resistance R1, the first stabilivolt Z1, the first diode D1, the second resistance R2, the second stabilivolt Z2 and the second diode D2.Wherein, one end of the first resistance R1 is connected with the D-FPDP of power-supply device USB interface 2.The negative electrode of the first stabilivolt Z1 and the other end of the first resistance R1 are connected.The anode of the first diode D1 and the anode of the first stabilivolt Z1 are connected.One end of second resistance R2 is connected with the D+ FPDP of power-supply device USB interface 2.The negative electrode of the second stabilivolt Z2 and the other end of the second resistance R2 are connected.The anode of the second diode D2 and the anode of the second stabilivolt Z2 are connected.The negative electrode of the first diode D1 and the negative electrode of the second diode D2 are as the outfan of voltage detection module 11, and the first diode D1 and the second diode D2 is for isolating influencing each other of D-data ports signal and D+ data ports signal.
Now, as shown in Figure 3, signal conversion module 12 can include power supply comparator U1, the reference power source end of power supply comparator U1 is connected with the outfan of voltage detection module 11, the plus earth of power supply comparator U1, the negative electrode of power supply comparator U1 can be provided by the reference voltage source within power supply comparator U1 as the outfan of signal conversion module 12, predeterminated voltage signal.Drive module 13 can include photoelectrical coupler U2, the anode of photoelectrical coupler U2 is connected with power supply 3, the negative electrode of photoelectrical coupler U2 is connected with the outfan of signal conversion module 12, the colelctor electrode of photoelectrical coupler U2 is connected with apparatus for protecting power supply 4, the grounded emitter of photoelectrical coupler U2, photoelectrical coupler U2 can be with the electrical connection of insulating power supply equipment 10 breaker in middle main primary 5 with switch power supply secondary 6, thus Switching Power Supply primary 5 leaks high pressure to switch power supply secondary 6 when preventing short circuit at power-supply device USB interface 2, thus protect power-supply device USB interface 2 and USB line 7 etc..
Preferably; as shown in Figure 3; the charging short-circuit protection 1 of power-supply device can also include filter circuit 14; filter circuit 14 is respectively connected with the outfan of voltage detection module 11 and the reference power source end of power supply comparator U1; the interference to signal conversion module 12 of high voltage transient when filter circuit 14 is for filtering transient short-circuit at power-supply device USB interface 2; prevent signal conversion module 12 output control signal by mistake, such that it is able to improve stability and the reliability of power-supply device 10.Preferably, as shown in Figure 3, filter circuit 14 can include that the 3rd resistance R3 of parallel connection and one end outfan with voltage detection module 11 respectively of the first electric capacity C1, one end of the 3rd resistance R3 and the first electric capacity C1 are connected, the other end of the 3rd resistance R3 and the other end ground connection of the first electric capacity C1.
Preferably; as it is shown on figure 3, the charging short-circuit protection 1 of power-supply device can also include that transient short-circuit protects module 15, transient short-circuit protection module 15 to be connected with FPDP 21; when transient short-circuit occurs in FPDP 21, FPDP 21 is protected by transient short-circuit protection module 15.Transient short-circuit protection module 15 can include the 3rd stabilivolt Z3 and the 4th stabilivolt Z4.Wherein, the negative electrode of the 3rd stabilivolt Z3 is connected with the D-FPDP of power-supply device USB interface 2, the plus earth of the 3rd stabilivolt Z3.The negative electrode of the 4th stabilivolt Z4 is connected with the D+ FPDP of power-supply device USB interface 2, the plus earth of the 4th stabilivolt Z4.
Specifically, as it is shown on figure 3, power supply 3 can be the mu balanced circuit being made up of audion Q1, the 4th resistance R4, the 5th stabilivolt Z5 and the second electric capacity C2.Wherein, the colelctor electrode of audion Q1 is respectively connected with the VBUS output port of power source of switch power supply secondary 6 and power-supply device USB interface 2, and the emitter stage of audion Q1 is connected by the anode of the 5th resistance R5 and photoelectrical coupler U2.One end of 4th resistance R4 is connected with the colelctor electrode of audion Q1.5th stabilivolt Z5 and the second electric capacity C2 is in parallel, and the negative electrode of the 5th stabilivolt Z5 is respectively connected with the other end of the base stage of audion Q1 and the 4th resistance R4, the plus earth of the 5th stabilivolt Z5.One end of second electric capacity C2 is respectively connected with the other end of the base stage of audion Q1 and the 4th resistance R4, the other end ground connection of the second electric capacity C2.
Due to one of them reason or two and certain above reasons such as USB connector (in the power-supply device USB interface 2) internal short-circuit of mobile device 20, the USB connector internal short-circuit of power-supply device 10, USB line 7 internal short-circuits, causing occurring low resistance to connect at power-supply device USB interface 2, D+ FPDP, D-FPDP, GND port low resistance are connected by the VBUS output port of power source of such as power-supply device USB interface 2.
If transient state low resistance connects; then protect FPDP 21 (D-FPDP, D+ FPDP) by the 3rd stabilivolt Z3 and the 4th stabilivolt Z4, prevent transient overvoltage (being produced by the electric leakage of VBUS output port of power source) from causing FPDP 21 to lose efficacy.
If long-time low resistance connects, and voltage (being produced by the electric leakage of VBUS output port of power source) is more than predeterminated voltage signal (such as 3.3V voltage at FPDP 21, D-FPDP, the highest signal voltage of D+ FPDP), power supply comparator U1 will be triggered by the first resistance R1, the first stabilivolt Z1, the first diode D1 and the second resistance R2, the second stabilivolt Z2, the voltage detection module 11 of the second diode D2 composition.Input more than the voltage signal of predeterminated voltage signal when the reference power source end of power supply comparator U1 has, power supply comparator U1 turns on and exports a low level, so that the LEDs ON within photoelectrical coupler U2, and in colelctor electrode one low level of generation of internal phototriode；Otherwise, the colelctor electrode of the internal phototriode of photoelectrical coupler U2 is in open-circuit condition.When the colelctor electrode of the internal phototriode of photoelectrical coupler U2 produces low level; low level triggers apparatus for protecting power supply 4 (such as over-pressure safety device, overtemperature protection system etc.); thus disconnect the connection of Switching Power Supply primary 5 and power supply; make switch power supply secondary 6 power-off; power supply 3 is stopped power supply, and finally avoids the USB connector etc. of power-supply device 10 to lose efficacy.
In the present embodiment; the charging short-circuit protection 1 of power-supply device mainly uses the discrete device (such as power supply comparator U1, the 3rd resistance R3 and the first electric capacity C1 etc.) being readily available, and solves the safety problem that the USB connector internal short-circuit of power-supply device 10, USB line 7 internal short-circuit etc. cause.When particularly the long-time short circuit current at power-supply device USB interface 2 can not trigger the apparatus for protecting power supply 4 of power-supply device 10, drive apparatus for protecting power supply 4 to work, thus the USB connector etc. of power-supply device 10 is effectively protected.
With reference to Fig. 4, it is shown that charging short-circuit protection 1 specific embodiment of another kind power-supply device of the present invention when power-supply device 10 be structural representation during fast charge equipment.As shown in Figure 4, voltage detection module 11 can include above-mentioned the first resistance R1, the first diode D1, the second resistance R2 and the second diode D2.Wherein, one end of the first resistance R1 is connected with the D-FPDP of power-supply device USB interface 2.The anode of the first diode D1 and the other end of the first resistance R1 are connected.One end of second resistance R2 is connected with the D+ FPDP of power-supply device USB interface 2.The anode of the second diode D2 and the other end of the second resistance R2 are connected, and the negative electrode of the first diode D1 and the negative electrode of the second diode D2 are as the outfan of voltage detection module 11.Signal conversion module 12 can include voltage checking chip U3, the input of voltage checking chip U3 is connected with the outfan of voltage detection module 11, the outfan of voltage checking chip U3 is as the outfan of signal conversion module 12, the ground end ground connection of voltage checking chip U3, predeterminated voltage signal can be provided by the reference voltage source within voltage checking chip U3.Voltage checking chip U3 possesses input voltage signal (such as 3.3V, but be not only 3.3V) detection function and anti-input voltage signal dither functions.Drive module 13 can include above-mentioned photoelectrical coupler U2.
Preferably, as shown in Figure 4, the charging short-circuit protection 1 of power-supply device can also include above-mentioned transient short-circuit protection module 15.
Specifically, power supply 3 can use the above-mentioned mu balanced circuit being made up of audion Q1, the 4th resistance R4, the 5th stabilivolt Z5 and the second electric capacity C2, and wherein, the power end of voltage checking chip U3 is connected with the emitter stage of audion Q1.
Due to one of them reason or two and certain above reasons such as the USB connector internal short-circuit of mobile device 20, the USB connector internal short-circuit of power-supply device 10, USB line 7 internal short-circuits, causing occurring low resistance to connect at power-supply device USB interface 2, D+ FPDP, D-FPDP, GND port low resistance are connected by the VBUS output port of power source of such as power-supply device USB interface 2.
If transient state low resistance connects, then protect FPDP 21 (D-FPDP, D+ FPDP) by the 3rd stabilivolt Z3 and the 4th stabilivolt Z4, prevent transient overvoltage from causing FPDP 21 to lose efficacy.
If long-time low resistance connects, and voltage is more than predeterminated voltage signal (such as 3.3V voltage at FPDP 21, D-FPDP, the highest signal voltage of D+ FPDP), by by the first resistance R1, the first diode D1 and the second resistance R2, voltage detection module 11 trigger voltage detection chip U3 of the second diode D2 composition.Input voltage signal (such as 3.3V when voltage checking chip U3, but be not only 3.3V) more than predeterminated voltage signal time, the outfan of voltage checking chip U3 drags down, so that the LEDs ON within photoelectrical coupler U2, and in colelctor electrode one low level of generation of internal phototriode；Otherwise, the colelctor electrode of the internal phototriode of photoelectrical coupler U2 is in open-circuit condition.When the colelctor electrode of the internal phototriode of photoelectrical coupler U2 produces low level; low level triggers apparatus for protecting power supply 4 (such as over-pressure safety device, overtemperature protection system etc.); thus disconnect the connection of Switching Power Supply primary 5 and power supply; make switch power supply secondary 6 power-off; power supply 3 is stopped power supply, and finally avoids the USB connector etc. of power-supply device 10 to lose efficacy.
In the present embodiment; the charging short-circuit protection 1 of power-supply device uses voltage checking chip U3 the most long-time short-circuit to the USB connector monitoring power-supply device 10, and then solves the safety problem that the USB connector internal short-circuit of power-supply device 10, USB line 7 internal short-circuit etc. cause.When particularly the long-time short circuit current at power-supply device USB interface 2 can not trigger the apparatus for protecting power supply 4 of power-supply device 10, drive apparatus for protecting power supply 4 to work, thus the USB connector etc. of power-supply device 10 is effectively protected.
In addition; it should be noted that; in one embodiment of the invention; when power-supply device 10 is common charger; voltage detection module 11 in the charging short-circuit protection 1 of power-supply device only can be connected (D-FPDP is closest with VBUS output port of power source) with the D-FPDP of power-supply device USB interface 2; transient short-circuit protection module 15 can only include the 3rd stabilivolt Z3 as shown in Figure 3 and Figure 4; the negative electrode of the 3rd stabilivolt Z3 is connected with the D-FPDP of power-supply device USB interface 2, the plus earth of the 3rd stabilivolt Z3.
Now, if transient state low resistance connects at power-supply device USB interface 2, then protect FPDP 21 (D-FPDP) by the 3rd stabilivolt Z3, prevent transient overvoltage from causing FPDP 21 to lose efficacy.
Specifically, in one embodiment of the invention, when signal conversion module 12 includes power supply comparator U1, voltage detection module 11 can include the first resistance R1 as shown in Figure 3, the first stabilivolt Z1 and the first diode D1, one end of first resistance R1 is connected with the D-FPDP of power-supply device USB interface 2, the negative electrode of the first stabilivolt Z1 and the other end of the first resistance R1 are connected, the anode of the first diode D1 and the anode of the first stabilivolt Z1 are connected, and the negative electrode of the first diode D1 is as the outfan of voltage detection module 11.
Now, if long-time low resistance connects at power-supply device USB interface 2, and voltage is more than predeterminated voltage signal (such as 3.3V voltage at FPDP 21, the highest signal voltage of D-FPDP), power supply comparator U1 will be triggered by the first resistance R1, the first stabilivolt Z1, the voltage detection module 11 of the first diode D1 composition.
Specifically, in another embodiment of the present invention, when signal conversion module 12 includes voltage checking chip U3, voltage detection module 11 can include the first resistance R1 as shown in Figure 4, the first diode D1, the second resistance R2 and the second diode D2, and one end of the first resistance R1 is connected with the D-FPDP of power-supply device USB interface 2.The anode of the first diode D1 and the other end of the first resistance R1 are connected, and the negative electrode of the first diode D1 is as the outfan of voltage detection module 11.
Now, if long-time low resistance connects at power-supply device USB interface 2, and voltage is more than predeterminated voltage signal (such as 3.3V voltage at FPDP 21, the highest signal voltage of D-FPDP), by by the first resistance R1, voltage detection module 11 trigger voltage detection chip U3 of the first diode D1 composition.
The charging short-circuit protection of the power-supply device of the embodiment of the present invention can be also used for there is the short-circuit protection organizing port in same adapter more; voltage detection module 11 can detect the voltage signal of other ports in addition to output port of power source and ground port; and it is not limited only to the D-FPDP within USB interface 2, D+ FPDP.
Compared with correlation technique, the charging short-circuit protection of the power-supply device of the embodiment of the present invention includes advantages below:
By the voltage signal of FPDP in voltage detection module detection power-supply device USB interface, and then when voltage signal is more than predeterminated voltage signal (predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device), voltage signal is converted to control signal by signal conversion module, rear drive module drives apparatus for protecting power supply to work so that power supply is stopped power supply according to control signal, thus at USB interface for a long time short circuit (such as USB connector internal short-circuit, USB line internal short-circuit), and short circuit current is not enough to trigger apparatus for protecting power supply (the such as overcurrent protective device of power-supply device, undervoltage protection device etc.) time, driving apparatus for protecting power supply works, thus USB interface etc. is effectively protected, avoid the occurrence of safety problem；
When transient short-circuit occurring at power-supply device USB interface, by transient short-circuit protection module, FPDP is protected, thus prevent transient overvoltage from causing FPDP etc. to lose efficacy.
With reference to Fig. 5, it is shown that one power-supply device 10 of the present invention, specifically may include that the charging short-circuit protection 1 of above-mentioned power-supply device, USB interface 2, power supply 3 and apparatus for protecting power supply 4.Wherein, when apparatus for protecting power supply 4 works, power supply 3 is stopped power supply.USB interface 2 is connected with power supply 3.The charging short-circuit protection 1 of power-supply device is respectively connected with USB interface 2 and apparatus for protecting power supply 4.
Compared with correlation technique, the power-supply device of the embodiment of the present invention includes advantages below:
By the voltage signal of FPDP in the charging short-circuit protection detection power-supply device USB interface of power-supply device, and then when voltage signal is more than predeterminated voltage signal (predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device), voltage signal is converted to control signal, apparatus for protecting power supply is driven to work so that power supply is stopped power supply finally according to control signal, thus at USB interface for a long time short circuit (such as USB connector internal short-circuit, USB line internal short-circuit), and short circuit current is not enough to trigger apparatus for protecting power supply (the such as overcurrent protective device of power-supply device, undervoltage protection device etc.) time, USB interface etc. is effectively protected, there is higher safety；
When transient short-circuit occurring by the charging short-circuit protection of power-supply device at power-supply device USB interface, FPDP is protected against transient overvoltage and causes FPDP etc. to lose efficacy, good reliability.
For power-supply device embodiment, owing to it includes the charging short-circuit protection of power-supply device, so describe is fairly simple, the part of the charging short-circuit protection embodiment that relevant part sees above-mentioned power-supply device illustrates.
Each embodiment in this specification all uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
Although having been described for the preferred embodiment of the embodiment of the present invention, but those skilled in the art once know basic creative concept, then these embodiments can be made other change and amendment.So, claims are intended to be construed to include preferred embodiment and fall into all changes and the amendment of range of embodiment of the invention.
Finally, it can further be stated that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation or sequentially that there is any this reality between these entities or operation.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that include that the process of a series of key element, method, article or terminal unit not only include those key elements, but also include other key elements being not expressly set out, or also include the key element intrinsic for this process, method, article or terminal unit.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in including the process of described key element, method, article or terminal unit.
Charging short-circuit protection and a kind of power-supply device to a kind of power-supply device provided by the present invention above; it is described in detail; principle and the embodiment of the present invention are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, the most all will change, in sum, this specification content should not be construed as limitation of the present invention.
Claims (10)
1. the charging short-circuit protection of a power-supply device, it is characterised in that including:
Voltage detection module, described voltage detection module is connected with the FPDP of power-supply device USB interface, and described voltage detection module detects the voltage signal of described FPDP；Described power-supply device USB interface is connected with the power supply of power-supply device；
Signal conversion module, described signal conversion module is connected with described voltage detection module, and when described voltage signal is more than predeterminated voltage signal, described voltage signal is converted to control signal by described signal conversion module；Described predeterminated voltage signal is less than the voltage signal of the apparatus for protecting power supply triggering power-supply device；
Driving module, described driving module is respectively connected with described signal conversion module and described apparatus for protecting power supply, and described driving module drives the work of described apparatus for protecting power supply according to described control signal；When described apparatus for protecting power supply works, described power supply is stopped power supply.
Charging short-circuit protection the most according to claim 1, it is characterised in that described voltage detection module includes:
First resistance, one end of described first resistance is connected with the D-FPDP of power-supply device USB interface；
First diode, the anode of described first diode is connected with the other end of described first resistance；
Second resistance, one end of described second resistance is connected with the D+ FPDP of power-supply device USB interface；
Second diode, the anode of described second diode is connected with the other end of described second resistance, and the negative electrode of described first diode and the negative electrode of described second diode are as the outfan of described voltage detection module.
Charging short-circuit protection the most according to claim 1, it is characterised in that described signal conversion module includes:
Voltage checking chip, the input of described voltage checking chip is connected with the outfan of described voltage detection module, and the outfan of described voltage checking chip is as the outfan of described signal conversion module.
Charging short-circuit protection the most according to claim 2, it is characterised in that described voltage detection module also includes:
First stabilivolt, the negative electrode of described first stabilivolt is connected with the other end of described first resistance, and the anode of described first stabilivolt is connected with the anode of described first diode；
Second stabilivolt, the negative electrode of described second stabilivolt is connected with the other end of described second resistance, and the anode of described second stabilivolt is connected with the anode of described second diode.
Charging short-circuit protection the most according to claim 1, it is characterised in that described signal conversion module includes:
Power supply comparator, the reference power source end of described power supply comparator is connected with the outfan of described voltage detection module, the plus earth of described power supply comparator, and the negative electrode of described power supply comparator is as the outfan of described signal conversion module.
Charging short-circuit protection the most according to claim 5, it is characterised in that also include:
Filter circuit, described filter circuit is respectively connected with the reference power source end of the outfan of described voltage detection module and described power supply comparator.
Charging short-circuit protection the most according to claim 1, it is characterised in that also include:
Transient short-circuit protection module, described transient short-circuit protection module is connected with described FPDP, and when transient short-circuit occurs in described FPDP, described FPDP is protected by described transient short-circuit protection module.
Charging short-circuit protection the most according to claim 7, it is characterised in that described transient short-circuit protection module includes:
3rd stabilivolt, the described negative electrode of the 3rd stabilivolt is connected with the D-FPDP of power-supply device USB interface, the plus earth of described 3rd stabilivolt；
4th stabilivolt, the described negative electrode of the 4th stabilivolt is connected with the D+ FPDP of power-supply device USB interface, the plus earth of described 4th stabilivolt.
Charging short-circuit protection the most according to claim 1, it is characterised in that described driving module includes:
Photoelectrical coupler, the anode of described photoelectrical coupler is connected with described power supply, and the negative electrode of described photoelectrical coupler is connected with the outfan of described signal conversion module, and the colelctor electrode of described photoelectrical coupler is connected with described apparatus for protecting power supply.
10. a power-supply device, it is characterised in that including:
Power supply and apparatus for protecting power supply；When described apparatus for protecting power supply works, described power supply is stopped power supply；
USB interface, described USB interface is connected with described power supply；
Charging short-circuit protection according to the power-supply device according to any one of claim 1-9, the charging short-circuit protection of described power-supply device is respectively connected with described USB interface and described apparatus for protecting power supply.
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| CN201510364316.3A CN105826894B (en) | 2015-06-25 | 2015-06-25 | The charging short-circuit protection and power-supply device of power-supply device |
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| CN107688133A (en) * | 2017-10-26 | 2018-02-13 | 绵阳高新区探索科技有限责任公司 | Control box has access to electricity short-circuit detecting circuit on charging gun cable |
| CN108710428A (en) * | 2018-05-15 | 2018-10-26 | 甄十信息科技（上海）有限公司 | Method and device for interface power supply |
| CN109116179A (en) * | 2018-09-17 | 2019-01-01 | 歌尔股份有限公司 | Handle function tests circuit and handle function test device |
| CN109586356A (en) * | 2018-11-01 | 2019-04-05 | Oppo广东移动通信有限公司 | Charge control method, device and computer storage medium |
| CN110875614A (en) * | 2018-09-04 | 2020-03-10 | 中兴通讯股份有限公司 | Protection method of charging interface and charging device |
| CN111641741A (en) * | 2020-05-18 | 2020-09-08 | 维沃移动通信有限公司 | Charging device |
| CN112332474A (en) * | 2020-10-19 | 2021-02-05 | 西安电子科技大学芜湖研究院 | Short circuit control method, system, medium and application of silicon carbide charging power supply |
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