CN205319688U - Power supply device's protection circuit - Google Patents
Power supply device's protection circuit Download PDFInfo
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- CN205319688U CN205319688U CN201620017528.4U CN201620017528U CN205319688U CN 205319688 U CN205319688 U CN 205319688U CN 201620017528 U CN201620017528 U CN 201620017528U CN 205319688 U CN205319688 U CN 205319688U
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Abstract
The utility model discloses a power supply device's protection circuit contains the good input signal processing circuit of a power protection unit and a power, the good input signal processing circuit electric connection of this power to this power protection unit, and wherein the good input signal processing circuit of this power receipt power supply device's a protection voltage has the accurate good incoming signal of power in low -voltage position in order to produce one, when the good incoming signal of this power protection unit this power of receipt was hanging down, this power protection unit started a protection mechanism. The utility model discloses can avoid electron device to start shooting under the condition of short circuit, the problem of the unable starting protection function of power supply.
Description
Technical field
The utility model relates to a kind of protection circuit, particularly the protection circuit of a kind of electricity source supply device.
Background technology
The output protection of the power supply unit of relevant technology; such as overvoltage, overcurrent and low-voltage ... Deng; most usage monitoring chip detects and exports voltage to reach the function of protection, and when the good input signal of power supply remains on height, power supply unit can start output protecting function.
But; in order to make the good input signal of power supply remain on height; the voltage that the main output power supply of power supply unit and auxiliary power supply provide the good input signal of power supply enough is to remain on height: so; start shooting when main output power supply and auxiliary power supply short circuit; the good input signal of power supply, owing to not having enough voltage to remain on height, can cause this power supply unit cannot starting protection function.
Practical novel content
For improving the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide the protection circuit of a kind of electricity source supply device so that it is electronics device can be avoided to start shooting in case of a short circuit, and power supply unit cannot the problem of starting protection function.
For reaching above-mentioned purpose of the present utility model, the protection circuit of electricity source supply device of the present utility model comprises a power supply protection unit; The one good input signal processing circuit of power supply, the good input signal processing circuit of this power supply is electrically connected to this power supply protection unit, and wherein a protection voltage of this power supply good input signal processing circuit reception electricity source supply device is to produce the good input signal of power supply that has low-voltage position standard; When this power supply is protected unit to receive the good input signal of this power supply is low, this power supply protection unit starting one protection mechanism.
Moreover, the protection circuit of electricity source supply device as above, more comprises a good circuit for checking input signals of power supply, and the good circuit for checking input signals of this power supply is electrically connected to the good input signal processing circuit of this power supply.
Moreover, the protection circuit of electricity source supply device as above, wherein the good input signal processing circuit of this power supply comprises a switch unit, and this switch unit is electrically connected to this power supply protection unit; One first resistance, this first resistance is electrically connected to this switch unit; One first optically-coupled detecting device, this first optically-coupled detecting device is electrically connected to this power supply protection unit, this switch unit and this first resistance; One first electric capacity, this first electric capacity is electrically connected to this power supply protection unit, this switch unit, this first resistance and this first optically-coupled detecting device; One the 2nd resistance, the 2nd resistance is electrically connected to this power supply protection unit, this switch unit, this first optically-coupled detecting device and this first electric capacity; One the 3rd resistance, the 3rd resistance is electrically connected to this power supply protection unit, this switch unit and the 2nd resistance; One the 2nd electric capacity, the 2nd electric capacity is electrically connected to this power supply protection unit, this switch unit, this first resistance, this first optically-coupled detecting device, this first electric capacity and the 2nd resistance.
Moreover, the protection circuit of electricity source supply device as above, wherein the good circuit for checking input signals of this power supply comprises one first optically-coupled transmitter; One the 4th resistance, the 4th resistance is electrically connected to this first optically-coupled transmitter; One the 5th resistance, the 5th resistance is electrically connected to this first optically-coupled transmitter and the 4th resistance; One the 6th resistance; One the 3rd electric capacity, the 3rd electric capacity is electrically connected to the 6th resistance; One the 7th resistance, the 7th resistance is electrically connected to the 3rd electric capacity; One the 8th resistance, the 8th resistance is electrically connected to the 3rd electric capacity and the 7th resistance; One first operational amplifier, the inverting input of this first operational amplifier is electrically connected to the 6th resistance and the 3rd electric capacity, the non-inverting input of this first operational amplifier is electrically connected to the 7th resistance, the 3rd electric capacity and the 8th resistance, and the output of this first operational amplifier is electrically connected to the 4th resistance and the 5th resistance.
Moreover, the protection circuit of electricity source supply device as above, wherein this protection voltage is a voltage of a main output voltage, a standby output voltage or electricity source supply device.
Moreover, the protection circuit of electricity source supply device as above, wherein this switch unit is a transistor switch.
Effect of the present utility model is to start this protection mechanism when the good input signal of this power supply is low, and so as to avoiding electronics device to start shooting in case of a short circuit, power supply unit cannot the problem of starting protection function.
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
Accompanying drawing explanation
Fig. 1 is the block diagram of the protection circuit of electricity source supply device of the present utility model.
Fig. 2 is the first partial circuit diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model.
Fig. 3 is the 2nd partial circuit diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model.
Fig. 4 is voltage and the signal timing diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model.
Wherein, Reference numeral:
The protection circuit of 10 electricity source supply devices
20 electronics devices
30 exchange power supplys
32 direct current voltages
34 power factor correcting voltages
36 changing voltages
38 output voltages
40 electricity source supply devices
100 power supply protection unit
The 102 good input signal processing circuits of power supply
The 104 good circuit for checking input signals of power supply
106 protection voltages
300 filter units
302 power factor correcting unit
304 main electric capacity
306 pulse wave width modulation unit
308 resonant converters
310 secondary side rectification units
312 outputs
400 switch unit
402 first resistance
404 first optically-coupled detecting devices
406 first electric capacity
408 the 2nd resistance
410 the 3rd resistance
412 the 2nd electric capacity
500 first optically-coupled transmitters
502 the 4th resistance
504 the 5th resistance
600 the 6th resistance
602 the 3rd electric capacity
604 the 7th resistance
606 the 8th resistance
608 first operational amplifiers
The good input signal of PGI power supply
PGO power supply well outputs signal
Vb bulk voltage
Vr voltage-stabilized power supply
Vcc supply voltage
Vsw power supply signal
V12A main output voltage
The standby output voltage of V12SB
T1 very first time point
T2 the 2nd time point
T3 the 3rd time point
T4 the 4th time point
Specific embodiment party formula
Relevant detailed explanation of the present utility model and technology contents, refer to following detailed explanation and accompanying drawing is described as follows, and accompanying drawing is with illustrating as illustrative purposes only in detail, is not for limiting the utility model.
Please refer to Fig. 1, it is the block diagram of the protection circuit of electricity source supply device of the present utility model. A kind of electricity source supply device 40 is applied to an electronics device 20.
This electricity source supply device 40 comprises protection circuit 10, filter unit 300, power factor correcting unit 302, main electric capacity 304, one pulse wave width modulation unit 306, resonant converter 308, secondary side rectification unit 310 and an output 312 of an electricity source supply device, and wherein the protection circuit 10 of this electricity source supply device comprises power supply protection unit 100, the good input signal processing circuit of power supply 102 and the good circuit for checking input signals 104 of a power supply.
This power supply protection unit 100 is electrically connected to this electronics device 20; The good input signal processing circuit 102 of this power supply is electrically connected to this power supply protection unit 100 and this output 312; The good circuit for checking input signals of this power supply 104 is electrically connected to the good input signal processing circuit 102 of this power supply, and this power factor correcting unit 302 is electrically connected to this filter unit 300; This main electric capacity 304 is electrically connected to this power factor correcting unit 302 and the good circuit for checking input signals 104 of this power supply; This pulse wave width modulation unit 306 is electrically connected to this power factor correcting unit 302 and the good circuit for checking input signals 104 of this power supply; This resonant converter 308 is electrically connected to this main electric capacity 304 and this pulse wave width modulation unit 306; This secondary side rectification unit 310 is electrically connected to this resonant converter 308; This output 312 is electrically connected to this secondary side rectification unit 310 and this electronics device 20; This power supply protection unit 100 is electrically connected to this pulse wave width modulation unit 306.
This filter unit 300 receives an exchange power supply 30; This this exchange power supply 30 of filter unit 300 filtering is to obtain a direct current voltage 32, and this filter unit 300 transmits this direct current voltage 32 to this power factor correcting unit 302; After this power factor correcting unit 302 receives this direct current voltage 32, this power factor correcting unit 302 processes this direct current voltage 32 to obtain a power factor correcting voltage 34, and this power factor correcting unit 302 transmits this power factor correcting voltage 34 to this resonant converter 308 through this main electric capacity 304; After this resonant converter 308 receives this power factor correcting voltage 34, this resonant converter 308 changes this power factor correcting voltage 34 to obtain a changing voltage 36, and this resonant converter 308 transmits this changing voltage 36 to this secondary side rectification unit 310; After this secondary side rectification unit 310 receives this changing voltage 36, this this changing voltage 36 of secondary side rectification unit 310 rectification is to obtain an output voltage 38, and this secondary side rectification unit 310 transmits this output voltage 38 to this electronics device 20 through this output 312.
The good input signal processing circuit of this power supply 102 receives a protection voltage 106 of this output 312 of this electricity source supply device 40 to produce the good input signal PGI of power supply that has low-voltage position standard; When this power supply is protected unit 100 to receive this power supply good input signal PGI be low, this power supply protection unit 100 starts a protection mechanism. In other words; it is low (different from relevant technology) for this power supply protection unit 100 receives this power supply good input signal PGI that this power supply of the present utility model protection unit 100 starts the condition of this protection mechanism; and the good input signal PGI of power supply that this that the good input signal processing circuit of this power supply 102 produces has low-voltage position standard has low-voltage position standard, therefore this protection mechanism is always protected unit 100 to start by this power supply.
Wherein this power supply protection unit 100 has the situation whether this protection voltage 106 detecting this electricity source supply device 40 overvoltage, overcurrent, low-voltage occur; when there is overvoltage, overcurrent, low-voltage in this protection voltage 106; this protection mechanism that this power supply protection unit 100 starts can notify this pulse wave width modulation unit 306 so that this electricity source supply device 40 stops exporting this output voltage 38 (this protection voltage 106).
This protection voltage 106 shown in Fig. 1 is this output voltage 38, but the utility model is not as limit; This protection voltage 106 can be a voltage (such as this direct current voltage 32, this power factor correcting voltage 34 or this changing voltage 36) of any part of this standby output voltage (Fig. 1 does not show) of output voltage 38, one or this electricity source supply device 40.
Please refer to Fig. 2, it is the first partial circuit diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model. The good input signal processing circuit 102 of this power supply comprises switch unit 400,1 first resistance 402,1 first optically-coupled detecting device 404,1 first electric capacity 406,1 the 2nd resistance 408,1 the 3rd resistance 410 and one the 2nd electric capacity 412.
The first end of this switch unit 400 is electrically connected to this power supply protection unit 100; 2nd end of this switch unit 400 is electrically connected to ground; The 2nd end that the first end of this first resistance 402 is electrically connected to this switch unit 400 and this first resistance 402 is electrically connected to this power supply protection unit 100; This first optically-coupled detecting device 404 is electrically connected to this power supply protection unit 100, this switch unit 400 and this first resistance 402; This first electric capacity 406 is electrically connected to this power supply protection unit 100, this switch unit 400, this first resistance 402 and this first optically-coupled detecting device 404; 2nd resistance 408 is electrically connected to this power supply protection unit 100, this switch unit 400, this first optically-coupled detecting device 404 and this first electric capacity 406; 3rd resistance 410 is electrically connected to this power supply protection unit 100, this switch unit 400, the 2nd resistance 408 and this electronics device 20; 2nd electric capacity 412 is electrically connected to this power supply protection unit 100, this switch unit 400, this first resistance 402, this first optically-coupled detecting device 404, this first electric capacity 406 and the 2nd resistance 408.
Wherein this electricity source supply device 40 provides a supply voltage Vcc to start this power supply protection unit 100; This electronics device 20 provides the power supply signal Vsw of a high-low voltage position standard with conducting or this switch unit 400 of not conducting; This switch unit 400 is a transistor switch.
Please refer to Fig. 3, it is the 2nd partial circuit diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model; And simultaneously with reference to Fig. 1 and Fig. 2. The good circuit for checking input signals 104 of this power supply comprises one first optically-coupled transmitter 500, the 4th resistance 502,1 the 5th resistance 504,1 the 6th resistance 600,1 the 3rd electric capacity 602,1 the 7th resistance 604,1 the 8th resistance 606 and one first operational amplifier 608.
4th resistance 502 is electrically connected to this first optically-coupled transmitter 500; 5th resistance 504 is electrically connected to this first optically-coupled transmitter 500 and the 4th resistance 502; 3rd electric capacity 602 is electrically connected to the 6th resistance 600; 7th resistance 604 is electrically connected to the 3rd electric capacity 602; 8th resistance 606 is electrically connected to the 3rd electric capacity 602 and the 7th resistance 604; The inverting input of this first operational amplifier 608 is electrically connected to the 6th resistance 600 and the 3rd electric capacity 602, the non-inverting input of this first operational amplifier 608 is electrically connected to the 7th resistance 604, the 3rd electric capacity 602 and the 8th resistance 606, and the output of this first operational amplifier 608 is electrically connected to the 4th resistance and the 5th resistance.
The good circuit for checking input signals 104 of this power supply receives a bulk voltage Vb, and wherein this bulk voltage Vb is from this main electric capacity 304 (this power factor correcting voltage 34); This pulse wave width modulation unit 306 transmits a voltage-stabilized power supply Vr to provide this power supply good circuit for checking input signals 104 electric power; When this bulk voltage Vb is greater than one first default bulk voltage, the output of this first operational amplifier 608 is low so that this first optically-coupled this first optically-coupled of transmitter 500 conducting detecting device 404; When this bulk voltage Vb is greater than one the 2nd default bulk voltage, this resonant converter 308 transmits this supply voltage Vcc and protects unit 100 to start this power supply protection unit 100 to this power supply; In the present embodiment, because this electronics device 20 is in open state, this protection voltage 106 of this output 312 is a main output voltage V12A (as shown in Figure 4) or standby output voltage V12SB (as shown in Figure 4).
Then, if this electronics device 20 normal boot-strap, this output 312 transmits this standby output voltage V12SB to the good input signal processing circuit of this power supply 102 to produce the good input signal PGI of this power supply, because this first optically-coupled this first optically-coupled of transmitter 500 conducting detecting device 404 makes this first optically-coupled detecting device 404 conducting ground connection so that this power supply good input signal PGI is low.
If this electronics device 20 short circuit start, the voltage of this input 312 is zero, and now this input 312 transmits a no-voltage to the good input signal processing circuit of this power supply 102 to produce the good input signal PGI of this power supply as low-voltage position standard.
The good circuit for checking input signals 104 of this power supply receives this bulk voltage Vb; This pulse wave width modulation unit 306 transmits this voltage-stabilized power supply Vr to provide this power supply good circuit for checking input signals 104 electric power; When this bulk voltage Vb is greater than this first default bulk voltage, the output of this first operational amplifier 608 is low so that this first optically-coupled this first optically-coupled of transmitter 500 conducting detecting device 404; When this bulk voltage Vb is greater than the 2nd default bulk voltage, this resonant converter 308 transmits this supply voltage Vcc and protects unit 100 to start this power supply protection unit 100 to this power supply; In the present embodiment, because this electronics device 20 is in standby state, this protection voltage 106 of this output 312 is only this standby output voltage V12SB (as shown in Figure 4).
Then, if this electronics device 20 normal boot-strap, this output 312 transmits this standby output voltage V12SB to the good input signal processing circuit of this power supply 102 to produce the good input signal PGI of this power supply; Because the power supply signal Vsw that this electronics device 20 is in standby state and transmits a high voltage level is to this switch unit 400; Conducting ground connection after the power supply signal Vsw that this switch unit 400 receives this high voltage level so that this power supply good input signal PGI is low.
If this electronics device 20 short circuit start, the voltage of this input 312 is zero, and now this input 312 transmits a no-voltage to the good input signal processing circuit of this power supply 102 to produce the good input signal PGI of this power supply as low-voltage position standard.
Please refer to Fig. 4, it is voltage and the signal timing diagram of an embodiment of the protection circuit of electricity source supply device of the present utility model; And please also refer to Fig. 1～3. Wherein a PGO is that a power supply well outputs signal (powergoodoutputsignal).
After this supply voltage Vcc rising to a default supply voltage and maintains a short time, this electronics device 20 is in open state, then this electronics device 20 produces the power supply signal Vsw of this low-voltage position standard, and now this power supply good input signal PGI just is preparing to transfer to low (i.e. very first time point t1); After postponing one period again, this power supply good input signal PGI is low, and it is low to start this protection mechanism (i.e. the 2nd time point t2) that this power supply protection unit 100 receives this power supply good input signal PGI; And after postponing one period, after this main output voltage V12A rising to a predeterminated voltage and maintaining a short time, this power supply well outputs signal PGO and transfers height to, and namely this this power supply protection unit 100 notifies that this electricity source supply device 40 can export voltage (i.e. the 3rd time point t3); When this electronics device 20 is in standby state, then this electronics device 20 produces the power supply signal Vsw of this high voltage level, and now this power supply well outputs signal PGO and transfers to low, exports this main output voltage V12A (i.e. the 4th time point t4) to stop.
Effect of the present utility model is to start this protection mechanism when this power supply good input signal PGI is low, and so as to avoiding this electronics device 20 to start shooting in case of a short circuit, power supply unit cannot the problem of starting protection function.
Certainly; the utility model also can have other various embodiments; when not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the utility model, but these change accordingly and are out of shape the protection domain that all should belong to the utility model claim.
Claims (6)
1. the protection circuit of an electric source supply device, it is characterised in that, comprise:
One power supply protection unit; And
The one good input signal processing circuit of power supply, the good input signal processing circuit of this power supply is electrically connected to this power supply protection unit,
Wherein a protection voltage of this power supply good input signal processing circuit reception electricity source supply device is to produce the good input signal of power supply that has low-voltage position standard; When this power supply is protected unit to receive the good input signal of this power supply is low, this power supply protection unit starting one protection mechanism.
2. the protection circuit of electricity source supply device according to claim 1, it is characterised in that, more comprise:
The one good circuit for checking input signals of power supply, the good circuit for checking input signals of this power supply is electrically connected to the good input signal processing circuit of this power supply.
3. the protection circuit of electricity source supply device according to claim 1, it is characterised in that, the good input signal processing circuit of this power supply comprises:
One switch unit, this switch unit is electrically connected to this power supply protection unit;
One first resistance, this first resistance is electrically connected to this switch unit;
One first optically-coupled detecting device, this first optically-coupled detecting device is electrically connected to this power supply protection unit, this switch unit and this first resistance;
One first electric capacity, this first electric capacity is electrically connected to this power supply protection unit, this switch unit, this first resistance and this first optically-coupled detecting device;
One the 2nd resistance, the 2nd resistance is electrically connected to this power supply protection unit, this switch unit, this first optically-coupled detecting device and this first electric capacity;
One the 3rd resistance, the 3rd resistance is electrically connected to this power supply protection unit, this switch unit and the 2nd resistance; And
One the 2nd electric capacity, the 2nd electric capacity is electrically connected to this power supply protection unit, this switch unit, this first resistance, this first optically-coupled detecting device, this first electric capacity and the 2nd resistance.
4. the protection circuit of electricity source supply device according to claim 2, it is characterised in that, the good circuit for checking input signals of this power supply comprises:
One first optically-coupled transmitter;
One the 4th resistance, the 4th resistance is electrically connected to this first optically-coupled transmitter;
One the 5th resistance, the 5th resistance is electrically connected to this first optically-coupled transmitter and the 4th resistance;
One the 6th resistance;
One the 3rd electric capacity, the 3rd electric capacity is electrically connected to the 6th resistance;
One the 7th resistance, the 7th resistance is electrically connected to the 3rd electric capacity;
One the 8th resistance, the 8th resistance is electrically connected to the 3rd electric capacity and the 7th resistance; And
One first operational amplifier, the inverting input of this first operational amplifier is electrically connected to the 6th resistance and the 3rd electric capacity, the non-inverting input of this first operational amplifier is electrically connected to the 7th resistance, the 3rd electric capacity and the 8th resistance, and the output of this first operational amplifier is electrically connected to the 4th resistance and the 5th resistance.
5. the protection circuit of electricity source supply device according to claim 1, it is characterised in that, this protection voltage is a voltage of a main output voltage, a standby output voltage or electricity source supply device.
6. the protection circuit of electricity source supply device according to claim 3, it is characterised in that, this switch unit is a transistor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017528.4U CN205319688U (en) | 2016-01-08 | 2016-01-08 | Power supply device's protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017528.4U CN205319688U (en) | 2016-01-08 | 2016-01-08 | Power supply device's protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205319688U true CN205319688U (en) | 2016-06-15 |
Family
ID=56201935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620017528.4U Active CN205319688U (en) | 2016-01-08 | 2016-01-08 | Power supply device's protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205319688U (en) |
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2016
- 2016-01-08 CN CN201620017528.4U patent/CN205319688U/en active Active
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