CN204205956U - There is the power supply device of overpower protection function - Google Patents
There is the power supply device of overpower protection function Download PDFInfo
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- CN204205956U CN204205956U CN201420648932.2U CN201420648932U CN204205956U CN 204205956 U CN204205956 U CN 204205956U CN 201420648932 U CN201420648932 U CN 201420648932U CN 204205956 U CN204205956 U CN 204205956U
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Abstract
There is a power supply device for overpower protection function, comprise a main transducer, a voltage overlaying circuit, a voltage detecting circuit and a controller of pulse width modulation.This voltage overlaying circuit is electrically connected to this main transducer; This voltage detecting circuit is electrically connected to this main transducer and this voltage overlaying circuit; This controller of pulse width modulation is electrically connected to this main transducer and this voltage detecting circuit.This main transducer comprises an inductive reactance.This voltage detecting circuit detects one of this inductive reactance induced voltage; When one of this power supply device output voltage is less than a pre-set output voltage, this voltage overlaying circuit provides a superimposed voltage to this voltage detecting circuit, and then this voltage detecting circuit transmits this induced voltage and this superimposed voltage to this controller of pulse width modulation.
Description
Technical field
The utility model is about a kind of power supply device, particularly a kind of power supply device with overpower protection function.
Background technology
Power supply device provides power supply to electronic installation, uses drive electronics.If power supply device utilizes USB (universal serial bus) to transmit power supply, then electronic installation can notify that the voltage of power supply device demand is as 5 volts or 20 volts.
Power supply device comprises transformer and controller of pulse width modulation, and transformer comprises primary side winding, auxiliary winding and primary side winding; When the voltage of electronic installation notice power supply device demand, controller of pulse width modulation can change the voltage of primary side winding, and primary side winding is understood the voltage of inductive primary side winding and produces voltage to be sent to electronic installation; Meanwhile, auxiliary winding can inductive secondary side winding voltage and produce voltage and give controller of pulse width modulation to be sent to controller of pulse width modulation with power supply.
In general, when using USB (universal serial bus) to transmit power supply, the output current of power supply device can be limited in about 2 Amps; Therefore, the power output of power supply device has been locked.In order to improve the power output of power supply device in the situation of the output current be locked, the output voltage of power supply device will be enhanced; Such as, the output voltage of power supply device is increased to 20 volts by 5 volts.
In general, the overpower protection function of power supply device is fixing, as with output voltage 5 volts or output voltage 20 volt design; If the overpower protection function of power supply device is with designed by output voltage 20 volts, then, when the output voltage of power supply device is 5 volts, the overpower protection function of power supply device can not successfully operate.
Please refer to Fig. 3, it is the overpower protection voltage oscillogram of overpower protection function when output voltage is 20 volts of the power supply device of correlation technique; Please refer to Fig. 4, it is the overpower protection voltage oscillogram of overpower protection function when output voltage is 5 volts of the power supply device of correlation technique.Because output voltage be the overpower protection voltage of 5 volts triggering level and output voltage is that the triggering level of the overpower protection voltage of 20 volts is identical, therefore output current when output voltage is 5 volts must be greater than output current when output voltage is 20 volts, to reach the triggering level of overpower protection voltage; If output current is larger, then the power component in power supply device is greater than the state of rated voltage or rated current by being operated in, power component is directly damaged.
Utility model content
For improving the shortcoming of above-mentioned prior art, the purpose of this utility model is to provide a kind of power supply device with overpower protection function.
For reaching above-mentioned purpose of the present utility model, the power supply device with overpower protection function of the present utility model comprises a main transducer; One voltage overlaying circuit, is electrically connected to this main transducer; One voltage detecting circuit, is electrically connected to this main transducer and this voltage overlaying circuit; And a controller of pulse width modulation, be electrically connected to this main transducer and this voltage detecting circuit.Wherein this main transducer comprises an inductive reactance, is electrically connected to this voltage detecting circuit, and wherein this voltage detecting circuit detects an induced voltage of this inductive reactance; When the output voltage that this has the power supply device of overpower protection function is less than a pre-set output voltage, this voltage overlaying circuit provides a superimposed voltage to this voltage detecting circuit, and then this voltage detecting circuit transmits this induced voltage and this superimposed voltage to this controller of pulse width modulation; When this induced voltage adds that this superimposed voltage is greater than an overpower protection voltage, this controller of pulse width modulation controls this main transducer and quits work.
The described power supply device with overpower protection function, this voltage overlaying circuit comprises:
One superimposed voltage produces circuit, is electrically connected to this voltage detecting circuit; And
One superimposed voltage control circuit, is electrically connected to this superimposed voltage and produces circuit and transformer,
Wherein when this output voltage is less than this pre-set output voltage, this this superimposed voltage of superimposed voltage control circuit conducting produces circuit, and making this superimposed voltage produce circuit provides this superimposed voltage to this voltage detecting circuit.
The described power supply device with overpower protection function, this main transducer more comprises:
One transformer, be electrically connected to this voltage overlaying circuit, this controller of pulse width modulation and this inductive reactance, wherein this transformer more comprises:
One primary side winding;
One primary side winding; And
One auxiliary winding, is electrically connected to this voltage overlaying circuit.
The described power supply device with overpower protection function, this main transducer more comprises a transistor switch, is electrically connected to this primary side winding, this voltage detecting circuit and this controller of pulse width modulation.
The described power supply device with overpower protection function, this voltage overlaying circuit more comprises:
One first diode, is electrically connected to this auxiliary winding and this controller of pulse width modulation; And
One first electric capacity, is electrically connected to this first diode and this controller of pulse width modulation,
Wherein this superimposed voltage control circuit comprises:
One first Zener diode, is electrically connected to this first diode and this controller of pulse width modulation.
The described power supply device with overpower protection function, is characterized in that, this superimposed voltage control circuit more comprises:
One first resistance, is electrically connected to this first Zener diode;
One second resistance, is electrically connected to this first resistance;
One first mos field effect transistor, is electrically connected to this first resistance; And
One the 3rd resistance, is electrically connected to this first diode, this first mos field effect transistor and this controller of pulse width modulation.
The described power supply device with overpower protection function, this superimposed voltage produces circuit and comprises:
One second mos field effect transistor, is electrically connected to this first diode, this first mos field effect transistor and this controller of pulse width modulation;
One the 4th resistance, is electrically connected to this second mos field effect transistor and this voltage detecting circuit; And
One second electric capacity, is electrically connected to this first diode, this second mos field effect transistor and this controller of pulse width modulation.
The described power supply device with overpower protection function, this voltage detecting circuit comprises:
One the 5th resistance, is electrically connected to this transistor switch, the 4th resistance and this inductive reactance;
One the 6th resistance, is electrically connected to the 4th resistance, the 5th resistance and this controller of pulse width modulation; And
One the 3rd electric capacity, is electrically connected to the 6th resistance and this controller of pulse width modulation.
The described power supply device with overpower protection function, more comprises:
One primary side filter circuit, is electrically connected to this primary side winding;
One primary side rectification circuit, is electrically connected to this primary side filter circuit;
One secondary side rectifier circuit, is electrically connected to this primary side winding; And
One primary side filter circuit, is electrically connected to this secondary side rectifier circuit.
The described power supply device with overpower protection function, is applied to an AC power feeding mechanism and an electronic installation, and this power supply device with overpower protection function more comprises:
One Electromagnetic interference filter, is electrically connected to this primary side rectification circuit and this AC power feeding mechanism;
One USB (universal serial bus), is electrically connected to this primary side filter circuit and this electronic installation;
Circuit is held in one friendship, is electrically connected to this USB (universal serial bus); And
One feedback circuit, is electrically connected to this friendship and holds circuit, this primary side filter circuit, this USB (universal serial bus) and this controller of pulse width modulation.
No matter why function of the present utility model is the output voltage of power supply device; the overpower protection function of power supply device all can successfully operate, and the circuit that increases of power supply device with low cost and the circuit increased are positioned at the primary side of power supply device.
Accompanying drawing explanation
Fig. 1 is the power supply device calcspar with overpower protection function of the present utility model;
Fig. 2 is an embodiment circuit diagram of voltage overlaying circuit of the present utility model and voltage detecting circuit;
Fig. 3 is the overpower protection function of the power supply device of correlation technique is 20 volts at output voltage
Time overpower protection voltage oscillogram;
Fig. 4 is the overpower protection function of the power supply device of correlation technique is 5 volts at output voltage
Time overpower protection voltage oscillogram;
Fig. 5 is the overpower protection voltage oscillogram of overpower protection function when output voltage is 5 volts with the power supply device of overpower protection function of the present utility model.
Wherein Reference numeral:
There is the power supply device 10 of overpower protection function
AC power feeding mechanism 20
Electronic installation 30
Main transducer 102
Voltage overlaying circuit 104
Voltage detecting circuit 106
Controller of pulse width modulation 108
Transformer 110
Primary side winding 112
Primary side winding 114
Auxiliary winding 116
Transistor switch 118
Primary side filter circuit 120
Primary side rectification circuit 122
Secondary side rectifier circuit 124
Primary side filter circuit 126
Electromagnetic interference filter 128
USB (universal serial bus) 130
Circuit 132 is held in friendship
Feedback circuit 134
First diode 10402
First electric capacity 10404
First Zener diode 10406
First resistance 10408
Second resistance 10410
First mos field effect transistor 10412
Second mos field effect transistor 10414
3rd resistance 10416
4th resistance 10418
Second electric capacity 10420
Superimposed voltage produces circuit 10422
Superimposed voltage control circuit 10424
Inductive reactance 10602
5th resistance 10604
6th resistance 10606
3rd electric capacity 10608
Embodiment
Please refer to Fig. 1, it is the power supply device calcspar with overpower protection function of the present utility model; One power supply device 10 with overpower protection function is applied to AC power feeding mechanism 20 and an electronic installation 30.
This power supply device 10 with overpower protection function comprises main transducer 102, voltage overlaying circuit 104, voltage detecting circuit 106, controller of pulse width modulation 108, primary side filter circuit 120, primary side rectification circuit 122, secondary side rectifier circuit 124, primary side filter circuit 126, Electromagnetic interference filter 128, USB (universal serial bus) 130, friendship and holds circuit (handshake circuit) 132 and a feedback circuit 134.
This main transducer 102 comprises transformer 110, transistor switch 118 and an inductive reactance 10602; This transformer 110 comprises primary side winding 112, primary side winding 114 and an auxiliary winding 116, and this transistor switch 118 can be such as but is not defined as a mos field effect transistor.
This voltage overlaying circuit 104 is electrically connected to this main transducer 102; This voltage detecting circuit 106 is electrically connected to this main transducer 102 and this voltage overlaying circuit 104; This controller of pulse width modulation 108 is electrically connected to this main transducer 102 and this voltage detecting circuit 106; This transformer 110 is electrically connected to this voltage overlaying circuit 104, this controller of pulse width modulation 108 and this inductive reactance 10602; This transistor switch 118 is electrically connected to this primary side winding 112, this voltage detecting circuit 106, this controller of pulse width modulation 108 and this inductive reactance 10602; This auxiliary winding 116 is electrically connected to this voltage overlaying circuit 104.
This primary side filter circuit 120 is electrically connected to this primary side winding 112; This primary side rectification circuit 122 is electrically connected to this primary side filter circuit 120; This secondary side rectifier circuit 124 is electrically connected to this primary side winding 114; This primary side filter circuit 126 is electrically connected to this secondary side rectifier circuit 124; This Electromagnetic interference filter 128 is electrically connected to this primary side rectification circuit 122 and this AC power feeding mechanism 20.
This USB (universal serial bus) 130 is electrically connected to this primary side filter circuit 126 and this electronic installation 30; This friendship is held circuit 132 and is electrically connected to this USB (universal serial bus) 130; This feedback circuit 134 is electrically connected to this friendship and holds circuit 132, this primary side filter circuit 126, this USB (universal serial bus) 130 and this controller of pulse width modulation 108; This inductive reactance 10602 is electrically connected to this voltage detecting circuit 106.
Please refer to Fig. 2, it is an embodiment circuit diagram of voltage overlaying circuit of the present utility model and voltage detecting circuit.This voltage overlaying circuit 104 comprises a superimposed voltage and produces circuit 10422, superimposed voltage control circuit 10424,1 first diode 10402 and one first electric capacity 10404; This superimposed voltage produces circuit 10422 and is electrically connected to this voltage detecting circuit 106; This superimposed voltage control circuit 10424 is electrically connected to this auxiliary winding 116 that this superimposed voltage produces circuit 10422 and this transformer 110.
When the output voltage that this has the power supply device 10 of overpower protection function is less than a pre-set output voltage; this superimposed voltage control circuit 10424 produces circuit 10422 conducting with this superimposed voltage; making this superimposed voltage produce circuit 10422 provides a superimposed voltage to this voltage detecting circuit 106, and this first diode 10402 and this first electric capacity 10404 are used as filter and use.
This superimposed voltage control circuit 10424 comprises one first Zener diode 10406,1 first resistance 10408,1 second resistance 10410,1 first mos field effect transistor 10412 and one the 3rd resistance 10416, and this superimposed voltage produces circuit 10422 and comprises one second mos field effect transistor 10414, the 4th resistance 10418 and one second electric capacity 10420.
This first diode 10402 is electrically connected to this auxiliary winding 116 and this controller of pulse width modulation 108; This first electric capacity 10404 is electrically connected to this first diode 10402 and this controller of pulse width modulation 108; This first Zener diode 10406 is electrically connected to this first diode 10402 and this controller of pulse width modulation 108; This first resistance 10408 is electrically connected to this first Zener diode 10406; This second resistance 10410 is electrically connected to this first resistance 10408; This first mos field effect transistor 10412 is electrically connected to this first resistance 10408; This second mos field effect transistor 10414 is electrically connected to this first diode 10402, this first mos field effect transistor 10412 and this controller of pulse width modulation 108.
3rd resistance 10416 is electrically connected to this first diode 10402, this first mos field effect transistor 10412, this second mos field effect transistor 10414 and this controller of pulse width modulation 108; 4th resistance 10418 is electrically connected to this second mos field effect transistor 10414 and this voltage detecting circuit 106; This second electric capacity 10420 is electrically connected to this first diode 10402, this second mos field effect transistor 10414 and this controller of pulse width modulation 108.This second electric capacity 10420 gives this controller of pulse width modulation 108 in order to power supply.
In other words, the anode of this first diode 10402 is connected to this auxiliary winding 116; The negative electrode of this first diode 10402 is connected to this controller of pulse width modulation 108; One end of this first electric capacity 10404 is connected to negative electrode and this controller of pulse width modulation 108 of this first diode 10402, the other end ground connection of this first electric capacity 10404; The negative electrode of this first Zener diode 10406 is connected to the negative electrode of this first diode 10402, one end of this first electric capacity 10404 and this controller of pulse width modulation 108; One end of this first resistance 10408 is connected to the anode of this first Zener diode 10406; One end of this second resistance 10410 is connected to the other end of this first resistance 10408; The other end ground connection of this second resistance 10410.
The grid of this first mos field effect transistor 10412 is connected to the other end of this first resistance 10408 and one end of this second resistance 10410, the source ground of this first mos field effect transistor 10412; The grid of this second mos field effect transistor 10414 is connected to the drain electrode of this first mos field effect transistor 10412, and the drain electrode of this second mos field effect transistor 10414 is connected to the negative electrode of this first diode 10402, one end of this first electric capacity 10404, the negative electrode of this first Zener diode 10406 and this controller of pulse width modulation 108.
One end of 3rd resistance 10416 be connected to the negative electrode of this first diode 10402, one end of this first electric capacity 10404, the negative electrode of this first Zener diode 10406, the drain electrode of this second mos field effect transistor 10414 and this controller of pulse width modulation the 108, three resistance 10416 the other end be connected to the drain electrode of this first mos field effect transistor 10412 and the grid of this second mos field effect transistor 10414; One end of 4th resistance 10418 is connected to the source electrode of this second mos field effect transistor 10414, and the other end of the 4th resistance 10418 is connected to this voltage detecting circuit 106; One end of this second electric capacity 10420 is connected to the negative electrode of this first diode 10402, one end of this first electric capacity 10404, the negative electrode of this first Zener diode 10406, the drain electrode of this second mos field effect transistor 10414, one end of the 3rd resistance 10416 and this controller of pulse width modulation 108, the other end ground connection of this second electric capacity 10420.
This voltage detecting circuit 106 comprises one the 5th resistance 10604,1 the 6th resistance 10606 and one the 3rd electric capacity 10608.
5th resistance 10604 is electrically connected to this transistor switch 118, the 4th resistance 10418 and this inductive reactance 10602; 6th resistance 10606 is electrically connected to the 4th resistance 10418, the 5th resistance 10604 and this controller of pulse width modulation 108; 3rd electric capacity 10608 is electrically connected to the 6th resistance 10606 and this controller of pulse width modulation 108.
In other words, one end of this inductive reactance 10602 is connected to this transistor switch 118, the other end ground connection of this inductive reactance 10602; One end of 5th resistance 10604 is connected to one end of this transistor switch 118 and this inductive reactance 10602, and the other end of the 5th resistance 10604 is connected to the other end of the 4th resistance 10418; One end of 6th resistance 10606 is connected to the other end of the 4th resistance 10418 and the other end of the 5th resistance 10604, and the other end of the 6th resistance 10606 is connected to this controller of pulse width modulation 108; One end of 3rd electric capacity 10608 is connected to the other end of this controller of pulse width modulation 108 and the 6th resistance 10606, the other end ground connection of the 3rd electric capacity 10608.
Please also refer to Fig. 1 and Fig. 2, this electronic installation 30 holds circuit 132 by this USB (universal serial bus) 130, this friendship and this feedback circuit 134 notifies that the voltage of this controller of pulse width modulation 108 1 demand is as 5 volts or 20 volts; Therefore, this controller of pulse width modulation 108 controls this transistor switch 118 to change a primary side winding voltage of this primary side winding 112; Wherein, this main transducer 102 can be such as but is not defined as a flyback (flyback) transducer, it is a prior art that this controller of pulse width modulation 108 controls this transistor switch 118 to change this primary side winding voltage of this primary side winding 112, for succinct factor, therefore repeat no more in this.
This voltage detecting circuit 106 detects an induced voltage of this inductive reactance 10602; This voltage detecting circuit 106 notifies this this induced voltage of controller of pulse width modulation 108; This overpower protection function with this controller of pulse width modulation 108 of overpower protection function is in order to the voltage of this demand is designed by 20 volts; Therefore, when the voltage of this demand is 20 volts, overpower protection function can successfully operate.
To describe when the voltage of this demand is 5 volts below, how overpower protection function also can successfully operate.
When the voltage of this demand is 20 volts, an auxiliary winding voltage of this auxiliary winding 116 is such as 80 volts; When the voltage of this demand is 5 volts, this auxiliary winding voltage of this auxiliary winding 116 is such as 20 volts; This is prior art, is succinct factor, therefore repeats no more in this.
One puncture voltage of this first Zener diode 10406 is a predeterminated voltage, is greater than 20 volts but is less than 80 volts, such as 40 volts; Therefore when this auxiliary winding voltage is 80 volts or the voltage of this demand be 20 volts, this first mos field effect transistor 10412 meeting conducting, this second mos field effect transistor 10414 can not conducting, and this auxiliary winding voltage can not be transferred into this voltage detecting circuit 106.
This voltage detecting circuit 106 transmits this induced voltage to this controller of pulse width modulation 108; This controller of pulse width modulation 108 judges whether this startup overpower protection function; This has this controller of pulse width modulation 108 overpower protection function originally of overpower protection function for this.
When this auxiliary winding voltage 20 volts of this auxiliary winding 116 is less than this predeterminated voltage 40 volts, the voltage of this demand is 5 volts, this first mos field effect transistor 10412 can not conducting, this second mos field effect transistor 10414 meeting conducting, this auxiliary winding voltage can be transferred into this voltage detecting circuit 106.
In other words, this voltage overlaying circuit 104 provides this superimposed voltage i.e. this auxiliary winding voltage to this voltage detecting circuit 106, and then this voltage detecting circuit 106 transmits this induced voltage and this superimposed voltage to this controller of pulse width modulation 108; Therefore, this controller of pulse width modulation 108 judges whether this startup overvoltage or overpower protection function; That is when this induced voltage adds that this superimposed voltage is greater than an overpower protection voltage, this controller of pulse width modulation 108 controls this main transducer 102 and quits work.
When the voltage of this demand is 5 volts, this controller of pulse width modulation 108 have received this induced voltage and this superimposed voltage; This induced voltage that this controller of pulse width modulation 108 receives is padded folded with can correctly triggered power defencive function by this superimposed voltage, and therefore overpower protection function can successfully operate.
That is, when this output voltage such as 5 volts that this has the power supply device 10 of overpower protection function be less than this pre-set output voltage such as 10 volts time, this voltage overlaying circuit 104 provides this superimposed voltage to this voltage detecting circuit 106.
This superimposed voltage described in above-described embodiment is this auxiliary winding voltage, and right the utility model is not as limit; This superimposed voltage also can be has the primary side of the power supply device 10 of overpower protection function or a voltage source of secondary side from this; this voltage source is connected to the drain electrode of this second mos field effect transistor 10414, one end of the 3rd resistance 10416 and one end of this second electric capacity 10420; but this voltage source is not attached to the negative electrode of the negative electrode of this first diode 10402, one end of this first electric capacity 10404 and this first Zener diode 10406; that is the circuit shown in Fig. 2 must be adjusted.
Please refer to Fig. 5, it is the overpower protection voltage oscillogram of overpower protection function when output voltage is 5 volts with the power supply device of overpower protection function of the present utility model; The slope of the voltage shown in Fig. 5 is roughly the same with the slope of the voltage shown in Fig. 4, but the voltage shown in Fig. 5 is padded by this superimposed voltage; When the output current that this has the power supply device 10 of overpower protection function improves, the voltage of the 3rd electric capacity 10608 can be improved; Therefore, compare with Fig. 4, being all output voltage is equally 5 volts, the overpower protection voltage triggered level that the overpower protection voltage triggered level that the compensation mechanism of Fig. 5 makes not need larger output current can reach with output voltage when being 20 volts is identical; That is; even if output voltage is 5 volts; this power supply device 10 with overpower protection function also can have correctly suitable overpower protection mechanism, and the power component in the power supply device 10 having overpower protection function to avoid this is operated in the state being greater than rated voltage or rated current.
Wherein, although foregoing is discussed for voltage, can try to achieve electric current, and power is the product of voltage and electric current by voltage, therefore concerning the utility model, overpower protection should have similar meaning with overvoltage protection.
No matter why the utility model has the advantage of the output voltage of power supply device; the overpower protection function of power supply device all can successfully operate, and the circuit that increases of power supply device with low cost and the circuit increased are positioned at the primary side of power supply device.
The utility model can protect this transformer 110 and this electronic installation 30; When this voltage detecting circuit 106 detects that voltage or electric current reach over-current protection point, this controller of pulse width modulation 108 can disconnect this transistor switch 118, the power supply device 10 protecting this to have overpower protection function by this and this electronic installation 30; That is, according to this voltage detecting circuit 106 be sent to the voltage of this controller of pulse width modulation 108, this controller of pulse width modulation 108 can control the conducting state of this transistor switch 118.
In sum, when knowing that the utility model has had industry applications, novelty and progressive, structure of the present utility model had not also seen like product and open use again, met new patent application important document completely, filed an application according to Patent Law.
Claims (10)
1. there is a power supply device for overpower protection function, it is characterized in that, comprise:
One main transducer;
One voltage overlaying circuit, is electrically connected to this main transducer;
One voltage detecting circuit, is electrically connected to this main transducer and this voltage overlaying circuit; And
One controller of pulse width modulation, is electrically connected to this main transducer and this voltage detecting circuit,
Wherein this main transducer comprises an inductive reactance, is electrically connected to this voltage detecting circuit;
Wherein this voltage detecting circuit detects one of this inductive reactance induced voltage; When the output voltage that this has the power supply device of overpower protection function is less than a pre-set output voltage, this voltage overlaying circuit provides a superimposed voltage to this voltage detecting circuit, and then this voltage detecting circuit transmits this induced voltage and this superimposed voltage to this controller of pulse width modulation; When this induced voltage adds that this superimposed voltage is greater than an overpower protection voltage, this controller of pulse width modulation controls this main transducer and quits work.
2. there is the power supply device of overpower protection function as claimed in claim 1, it is characterized in that,
This voltage overlaying circuit comprises:
One superimposed voltage produces circuit, is electrically connected to this voltage detecting circuit; And
One superimposed voltage control circuit, is electrically connected to this superimposed voltage and produces circuit and transformer,
Wherein when this output voltage is less than this pre-set output voltage, this this superimposed voltage of superimposed voltage control circuit conducting produces circuit, and making this superimposed voltage produce circuit provides this superimposed voltage to this voltage detecting circuit.
3. have the power supply device of overpower protection function as claimed in claim 1, it is characterized in that, this main transducer more comprises:
One transformer, is electrically connected to this voltage overlaying circuit, this controller of pulse width modulation and this inductive reactance,
Wherein this transformer more comprises:
One primary side winding;
One primary side winding; And
One auxiliary winding, is electrically connected to this voltage overlaying circuit.
4. have the power supply device of overpower protection function as claimed in claim 3, it is characterized in that, this main transducer more comprises a transistor switch, is electrically connected to this primary side winding, this voltage detecting circuit and this controller of pulse width modulation.
5. have the power supply device of overpower protection function as claimed in claim 4, it is characterized in that, this voltage overlaying circuit more comprises:
One first diode, is electrically connected to this auxiliary winding and this controller of pulse width modulation; And
One first electric capacity, is electrically connected to this first diode and this controller of pulse width modulation,
Wherein this superimposed voltage control circuit comprises:
One first Zener diode, is electrically connected to this first diode and this controller of pulse width modulation.
6. have the power supply device of overpower protection function as claimed in claim 5, it is characterized in that, this superimposed voltage control circuit more comprises:
One first resistance, is electrically connected to this first Zener diode;
One second resistance, is electrically connected to this first resistance;
One first mos field effect transistor, is electrically connected to this first resistance; And
One the 3rd resistance, is electrically connected to this first diode, this first mos field effect transistor and this controller of pulse width modulation.
7. have the power supply device of overpower protection function as claimed in claim 6, it is characterized in that, this superimposed voltage produces circuit and comprises:
One second mos field effect transistor, is electrically connected to this first diode, this first mos field effect transistor and this controller of pulse width modulation;
One the 4th resistance, is electrically connected to this second mos field effect transistor and this voltage detecting circuit; And
One second electric capacity, is electrically connected to this first diode, this second mos field effect transistor and this controller of pulse width modulation.
8. have the power supply device of overpower protection function as claimed in claim 7, it is characterized in that, this voltage detecting circuit comprises:
One the 5th resistance, is electrically connected to this transistor switch, the 4th resistance and this inductive reactance;
One the 6th resistance, is electrically connected to the 4th resistance, the 5th resistance and this controller of pulse width modulation; And
One the 3rd electric capacity, is electrically connected to the 6th resistance and this controller of pulse width modulation.
9. there is the power supply device of overpower protection function as claimed in claim 8, it is characterized in that, more comprise:
One primary side filter circuit, is electrically connected to this primary side winding;
One primary side rectification circuit, is electrically connected to this primary side filter circuit;
One secondary side rectifier circuit, is electrically connected to this primary side winding; And
One primary side filter circuit, is electrically connected to this secondary side rectifier circuit.
10. there is the power supply device of overpower protection function as claimed in claim 9; it is characterized in that; this power supply device with overpower protection function is applied to an AC power feeding mechanism and an electronic installation, and this power supply device with overpower protection function more comprises:
One Electromagnetic interference filter, is electrically connected to this primary side rectification circuit and this AC power feeding mechanism;
One USB (universal serial bus), is electrically connected to this primary side filter circuit and this electronic installation;
Circuit is held in one friendship, is electrically connected to this USB (universal serial bus); And
One feedback circuit, is electrically connected to this friendship and holds circuit, this primary side filter circuit, this USB (universal serial bus) and this controller of pulse width modulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648932.2U CN204205956U (en) | 2014-10-31 | 2014-10-31 | There is the power supply device of overpower protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648932.2U CN204205956U (en) | 2014-10-31 | 2014-10-31 | There is the power supply device of overpower protection function |
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| CN204205956U true CN204205956U (en) | 2015-03-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375778A (en) * | 2015-12-03 | 2016-03-02 | 成都启臣微电子有限公司 | Composite multifunctional novel OCP control circuit |
| CN107026429A (en) * | 2016-01-29 | 2017-08-08 | 群光电能科技股份有限公司 | Excess voltage protection |
| CN111900783A (en) * | 2019-05-05 | 2020-11-06 | 宏碁股份有限公司 | Over-power protection circuit, charger and over-power protection method |
-
2014
- 2014-10-31 CN CN201420648932.2U patent/CN204205956U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375778A (en) * | 2015-12-03 | 2016-03-02 | 成都启臣微电子有限公司 | Composite multifunctional novel OCP control circuit |
| CN105375778B (en) * | 2015-12-03 | 2017-11-28 | 成都启臣微电子股份有限公司 | A kind of composite multifunction OCP control circuits |
| CN107026429A (en) * | 2016-01-29 | 2017-08-08 | 群光电能科技股份有限公司 | Excess voltage protection |
| CN111900783A (en) * | 2019-05-05 | 2020-11-06 | 宏碁股份有限公司 | Over-power protection circuit, charger and over-power protection method |
| CN111900783B (en) * | 2019-05-05 | 2022-05-03 | 宏碁股份有限公司 | Over-power protection circuit, charger and over-power protection method |
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