CN205430046U - Switching power supply circuit with backup battery power supply - Google Patents
Switching power supply circuit with backup battery power supply Download PDFInfo
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- CN205430046U CN205430046U CN201520855573.2U CN201520855573U CN205430046U CN 205430046 U CN205430046 U CN 205430046U CN 201520855573 U CN201520855573 U CN 201520855573U CN 205430046 U CN205430046 U CN 205430046U
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Abstract
The utility model provides a switching power supply circuit with backup battery power supply, including input rectifier module, PWM on -off control module, transformer module, output Rectifier diode, burden feedback module, backup battery, isolating diode unit and zener diode, the anodal of output Rectifier diode is connected with transformer module's forward transportation output, and the negative pole and the negative pole of isolating diode unit of output Rectifier diode are connected, and anodal and the anodal of backup battery of isolating diode unit are connected, and backup battery's negative pole is connected with transformer module's negative output end, zener diode's negative pole connect in between the negative pole of isolating diode unit and the negative pole of output Rectifier diode, the one end and the anodal of zener diode of negative feedback circuit module are connected, and the other end is connected with the control port of PWM on -off control module. The utility model discloses have the loss that reduces switching power supply output, improve switching power supply's conversion efficiency's beneficial effect.
Description
Technical field
This utility model relates to electronic technology field, has the battery-powered switching power circuit of standby electricity particularly to one.
Background technology
The PWM Switching Power Supply being provided with reserve battery of the prior art, but the isolation way that its structure is typically with multiple diode reaches to isolate between two power subsystems, prevent mutually pouring in down a chimney between two power supplys, the generally outfan at battery seals in two diodes to prevent Switching Power Supply to charge to battery, simultaneously the most also can prevent the electric current of battery from pouring in down a chimney to Switching Power Supply by the outfan of a Switching Power Supply isolating diode of connecting, prevent the energy of battery from quickly ruing out of and losing standby function.
In view of the requirement of power supply conversion efficiency is promoted by current various countries, existing isolation technology existing defects, the isolating diode at switched power output can significantly consume the output of Switching Power Supply, be substantially reduced Switching Power Supply energy conversion efficiency, need to improve.
Utility model content
This utility model main purpose is the defect for prior art, it is provided that a kind of improvement there is the battery-powered switching power circuit of standby electricity.
This utility model provides one and has the battery-powered switching power circuit of standby electricity, including input rectifying module, PWM switch control module, transformer module, output commutation diode, negative feedback module, reserve battery, isolating diode unit and Zener diode；
Described input rectifying module, described PWM switch control module and described transformer module are sequentially connected with, the positive pole of described output commutation diode is connected with the positive output end of described transformer module, the negative pole of described output commutation diode is connected with the negative pole of described isolating diode unit, the positive pole of described isolating diode unit is connected with the positive pole of described reserve battery, and the negative pole of described reserve battery is connected with the negative output terminal of described transformer module；The negative pole of described Zener diode is connected between the negative pole of described isolating diode unit and the negative pole of described output commutation diode；One end of described negative feedback module is connected with the positive pole of described Zener diode, and the other end is connected with the control port of described PWM switch control module.
This utility model make use of the reverse-conducting of Zener diode and reverse cut-off characteristics, the commutation diode that simultaneously taking account of switched power output natively has has isolated reserve battery to conventional switching power supply module discharge, this utility model directly eliminates the isolating diode of the outfan of Switching Power Supply of the prior art, output voltage when normally working in view of the conventional switching power supply module with the battery-powered switching power circuit of standby electricity is X volt, the voltage presetting reserve battery is Z volt, and the rated value of Zener diode is Y volt.Relation between X, Y, Z meets X > Y > Z, when conventional switching power supply module section normal power supply, Zener diode just serves pressure stabilization function, it is possible to adjust stablizing of output voltage by negative feedback module；Simultaneously because the voltage of reserve battery is less than the threshold value of Zener diode, when conventional switching power supply module go wrong and can not normal power supply time, Zener diode realizes the isolation features to reserve battery, prevent reserve battery to conventional switching power supply module discharge, greatly reduce the loss of Switching Power Supply output, improve the conversion efficiency of Switching Power Supply.
Accompanying drawing explanation
Fig. 1 is the theory diagram with the battery-powered switching power circuit of standby electricity in this utility model one preferred embodiment；
Fig. 2 is the circuit theory diagrams with the battery-powered switching power circuit of standby electricity in this utility model one preferred embodiment.
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is described more fully.Accompanying drawing gives first-selected embodiment of the present utility model.But, this utility model can realize in many different forms, however it is not limited to embodiment described herein.On the contrary, providing the purpose of these embodiments is to make to disclosure of the present utility model more thoroughly comprehensively.
It should be noted that be referred to as " being fixed on " another element when element, it can be directly on another element or can also there is element placed in the middle.When an element is considered as " connection " another element, and it can be directly to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", "left", "right" and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model are generally understood that.It is intended merely to describe the purpose of specific embodiment at term used in the description of the present utility model herein, it is not intended that in limiting this utility model.Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
Fig. 1 shows that the one in this utility model first embodiment has the battery-powered switching power circuit of standby electricity, and it includes input rectifying module 10, PWM switch control module 20, transformer module 30, output commutation diode 40, negative feedback module 50, reserve battery 80, isolating diode unit 70 and Zener diode 60.Input rectifying module 10, PWM switch control module 20, transformer module 30, output commutation diode 40, negative feedback module 50 are the basic function module constituting Switching Power Supply, that is to say and constitute conventional switching power supply module.Wherein, transformer module 30 is used and is coupled by coil, and negative feedback module 50 uses the feedback circuit by photoelectric coupling, and it is not limited to this.
Wherein, described input rectifying module 10, described PWM switch control module 20 and described transformer module 30 are sequentially connected with, the positive pole of described output commutation diode 40 is connected with the positive output end of the secondary of described transformer module 30, the negative pole of described output commutation diode 40 is connected with the negative pole of described isolating diode unit 70, the positive pole of described isolating diode unit 70 is connected with the positive pole of described reserve battery 80, and the negative pole of described reserve battery 80 is connected with the negative output terminal of described transformer module 30；The negative pole of described Zener diode 60 is connected between the negative pole of described isolating diode unit 70 and the negative pole of described output commutation diode 40；One end of described negative feedback module 50 is connected with the positive pole of described Zener diode 60, and the other end is connected with the control port of described PWM switch control module 20.
This utility model make use of the reverse-conducting of Zener diode 60 and reverse cut-off characteristics, the commutation diode 40 that simultaneously taking account of switched power output natively has has isolated reserve battery 80 to conventional switching power supply module discharge, this utility model directly eliminates the isolating diode of the outfan of Switching Power Supply of the prior art, presetting output voltage when this conventional switching power supply module with the battery-powered switching power circuit of standby electricity normally works is X volt, the voltage presetting reserve battery 80 is Z volt, and the rated value of Zener diode 60 is Y volt.Relation between X, Y, Z meets X > Y > Z, when conventional switching power supply module section normal power supply, Zener diode 60 just serves pressure stabilization function, it is possible to adjust stablizing of output voltage by negative feedback module 50；Simultaneously because the voltage of reserve battery 80 is less than the threshold value of Zener diode 60, when conventional switching power supply module go wrong and can not normal power supply time, Zener diode 60 realizes the isolation features to reserve battery 80, prevent reserve battery 80 to conventional switching power supply module discharge, greatly reduce the loss of Switching Power Supply output, improve the conversion efficiency of Switching Power Supply.
Specifically, as shown in Figure 2, there is the battery-powered switching power circuit of standby electricity and also include filter capacitor C1, one end of described filter capacitor C1 is connected between the negative pole of described isolating diode unit 70 and the negative pole of described output commutation diode 40, and the other end of described filter capacitor C1 is connected with the negative output terminal of described transformer module 30.Described isolating diode unit 70 includes an isolating diode or the isolating diode of at least two series connection.In the present embodiment, this isolating diode unit 70 includes the first isolating diode D1 and the second isolating diode D2 of series connection.
It is to be appreciated that the number of Zener diode 60 is not limited to 1, it is also possible to be two or 3.In the present embodiment, this Zener diode 60 includes the first Zener diode D3.
This has the battery-powered switching power circuit of standby electricity and also includes that the first common mode inductance L1, two inputs of described first common mode inductance L1 are connected with the negative pole of described isolating diode unit 70 and the negative pole of described reserve battery 80 respectively.
This has the battery-powered switching power circuit of standby electricity and also includes LED 1 and divider resistance R3.One end of divider resistance R3 is connected between positive pole and the negative feedback module 50 of the first Zener diode D3, the other end of this divider resistance R3 is connected with the positive pole of this LED 1, and the negative pole of this LED 1 connects this negative output terminal with the battery-powered switching power circuit of standby electricity.
Preferably, this input rectification circuit 10 includes electric fuse, high-voltage capacitance, common mode inductance and rectifier bridge stack, this electric fuse, the second common mode inductance, rectifier bridge stack and PWM switch control module 20 are sequentially connected with, wherein electric fuse is serially connected in AC input, and high-voltage capacitance is also connected in rectifier bridge stack outfan two ends.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed, but therefore can not be interpreted as the restriction to this utility model the scope of the claims.It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (5)
1. one kind has the battery-powered switching power circuit of standby electricity, it is characterized in that, including input rectifying module (10), PWM switch control module (20), transformer module (30), output commutation diode (40), negative feedback module (50), reserve battery (80), isolating diode unit (70) and Zener diode (60)；
Described input rectifying module (10), described PWM switch control module (20) and described transformer module (30) are sequentially connected with, the positive pole of described output commutation diode (40) is connected with the positive output end of described transformer module (30), the negative pole of described output commutation diode (40) is connected with the negative pole of described isolating diode unit (70), the positive pole of described isolating diode unit (70) is connected with the positive pole of described reserve battery (80), and the negative pole of described reserve battery (80) is connected with the negative output terminal of described transformer module (30)；The negative pole of described Zener diode (60) is connected between the negative pole of described isolating diode unit (70) and the negative pole of described output commutation diode (40)；One end of described negative feedback module (50) is connected with the positive pole of described Zener diode (60), and the other end is connected with the control port of described PWM switch control module (20).
There is standby electricity battery-powered switching power circuit the most as claimed in claim 1, it is characterized in that, also include filter capacitor, one end of described filter capacitor is connected between the negative pole of described isolating diode unit (70) and the negative pole of described output commutation diode (40), and the other end of described filter capacitor is connected with the negative output terminal of described transformer module (30).
There is standby electricity battery-powered switching power circuit the most as claimed in claim 2, it is characterised in that described isolating diode unit (70) includes an isolating diode or the isolating diode of at least two series connection.
There is standby electricity battery-powered switching power circuit the most as claimed in claim 1, it is characterized in that, also include that the first common mode inductance (L1), two inputs of described first common mode inductance (L1) are connected with the negative pole of described isolating diode unit (70) and the negative pole of described reserve battery (80) respectively.
There is standby electricity battery-powered switching power circuit the most as claimed in claim 1, it is characterized in that, described input rectifying module (10) includes electric fuse, high-voltage capacitance, the second common mode inductance and rectifier bridge stack, described electric fuse, described second common mode inductance, described rectifier bridge stack and described PWM switch control module (20), described high-voltage capacitance also couples on described rectifier bridge stack two outfan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520855573.2U CN205430046U (en) | 2015-11-01 | 2015-11-01 | Switching power supply circuit with backup battery power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520855573.2U CN205430046U (en) | 2015-11-01 | 2015-11-01 | Switching power supply circuit with backup battery power supply |
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| CN205430046U true CN205430046U (en) | 2016-08-03 |
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| CN201520855573.2U Active CN205430046U (en) | 2015-11-01 | 2015-11-01 | Switching power supply circuit with backup battery power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846660A (en) * | 2015-11-01 | 2016-08-10 | 梁德新 | Switching power supply circuit with function of power supply through backup battery |
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2015
- 2015-11-01 CN CN201520855573.2U patent/CN205430046U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846660A (en) * | 2015-11-01 | 2016-08-10 | 梁德新 | Switching power supply circuit with function of power supply through backup battery |
| CN105846660B (en) * | 2015-11-01 | 2018-10-26 | 梁德新 | With the battery-powered switching power circuit of standby electricity |
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