CN202524284U - Switch power supply capable of outputting high peak power - Google Patents
Switch power supply capable of outputting high peak power Download PDFInfo
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- CN202524284U CN202524284U CN2012201071689U CN201220107168U CN202524284U CN 202524284 U CN202524284 U CN 202524284U CN 2012201071689 U CN2012201071689 U CN 2012201071689U CN 201220107168 U CN201220107168 U CN 201220107168U CN 202524284 U CN202524284 U CN 202524284U
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- power supply
- voltage
- pin2
- switch power
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Abstract
The utility model provides a switch power supply capable of outputting the high peak power. The switch power supply includes a lightning protection module, an EMI filter module, a rectifier and filter module, a main transfer circuit module, a secondary rectifier and filter module, and a voltage feedback module. The input terminal of the lightning protection module is connected with the alternating current. The output terminal of the secondary rectifier and filter module is connected with a load. The voltage feedback module is connected with an IC PIN2 via an optoelectronic coupler. The IC PIN2 is connected with the ground via a resistor or a voltage-regulator tube. Because the IC PIN2 is connected with the ground via a 10K resistor or a 4.8V voltage-regulator tube, the voltage of the IC PIN2 is divided, and the voltage is kept at 4.8V, the high peak power of the switch power supply is increased, and the smooth starting of an electrical device is guaranteed, and at the same time, the permanent damage of the switch power supply caused by the overlarge starting power is avoided. Beside, the circuit of the switch power supply is simple and is easy to realize.
Description
Technical field
The utility model relates to Switching Power Supply, relates in particular to a kind of Switching Power Supply of exporting high-peak power.
Background technology
At present, Switching Power Supply is widely used in daily life, is mainly the equipment supply of electrical energy, has brought into play important role, all supplies power in widely-used Switching Power Supply like audio frequency and video series products such as DVR notebook, MODEM, watch-dogs.Usually, all be provided with the peak current protective circuit in the Switching Power Supply, cause the damage of Switching Power Supply when preventing that power output is excessive, traditional circuit overpower protection scope at 1.2-2 doubly.
Yet; At present many equipment like motor, DVR, CCD etc., can reach 2-3.5 doubly at startup its starting current peak value of moment; Traditional like this peak current protective circuit does not have the effect of protection; Thereby cause the power initiation difficulty, even cause the power supply permanent damage because of starting power is excessive, irrecoverable.Thereby, be necessary this Switching Power Supply is improved, enlarge its overpower protection scope.
Summary of the invention
The purpose of the utility model is to provide a kind of Switching Power Supply of exporting high-peak power, improves the peak power of Switching Power Supply output, starts various device smoothly, guarantees the safety of power supply.
The purpose of the utility model realizes through following technical scheme:
A kind of Switching Power Supply of exporting high-peak power; Comprise: the lightning protection module, EMI filtration module, rectification filtering module, the main transformer that connect successively change circuit module, secondary commutation filtration module, Voltage Feedback module; The input of said lightning protection module connects alternating current; The output of secondary commutation filtration module connects load, and said Voltage Feedback module is connected to IC PIN2 pin through photoelectrical coupler, and said IC PIN2 pin is through resistance or voltage-stabiliser tube ground connection.
Wherein, the resistance of said resistance is 10K.
Wherein, the voltage stabilizing value of said voltage-stabiliser tube is 4.8V.
Compared with prior art, the utility model embodiment has following beneficial effect:
The utility model adds 10K resistance or 4.8V voltage-stabiliser tube at IC PIN2 pin to GND; PIN2 pin voltage is carried out dividing potential drop and voltage stabilizing 4.8V scope; Thereby promote the peak power of Switching Power Supply; Guaranteed the smooth startup of power consumption equipment, avoided Switching Power Supply simultaneously, and circuit is simple and easy to realize because of the excessive permanent damage of starting power.
Description of drawings
Fig. 1 is the principle assumption diagram of the Switching Power Supply that provides of the utility model embodiment.
Fig. 2 is the circuit structure diagram of the Switching Power Supply that provides of the utility model embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 1, Switching Power Supply mainly comprises in the present embodiment: lightning protection module, EMI filtration module, rectification filtering module, main transformer change circuit module, secondary commutation filtration module, Voltage Feedback control module, PWM control module.Lightning protection module, EMI filtration module, rectification filtering module, main transformer change circuit module, secondary commutation filtration module, Voltage Feedback control module and connect successively, and the lightning protection module connects the alternating current input, and the secondary commutation filtration module connects load.
In the present embodiment; The physical circuit figure of Switching Power Supply sees also shown in Figure 2; The course of work after powering on is specially: input to rectification filtering module after passing through lightning protection module and EMI filtration module successively after the electric main input; After rectification filtering module converts direct current to, export to main transformer and change circuit module, after main transformer changes circuit module, export to the secondary commutation filtration module, behind secondary commutation filtration module rectifying and wave-filtering, export to load; The Voltage Feedback control module is sent to LD7530 PIN2 pin according to the load size through photoelectrical coupler.Just often PIN2 pin voltage is about 1.2V, and along with load current increases, voltage is also along with rising here, and IC OLP function action gets into guard mode when reaching 5V.At IC PIN2 pin GND is added R30 10K resistance or 4.8V voltage-stabiliser tube in the present embodiment, PIN2 pin voltage is carried out dividing potential drop and voltage stabilizing 4.8V scope.Just can promote the Switching Power Supply peak power this moment, lets the protection point amplify, and get into permanent power rating, i.e. electric current increase voltage descends, and input power can not be suddenlyd change, and is with the excessive power supply permanent damages that causes of protection switch power initiation power, irrecoverable.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (3)
1. Switching Power Supply of exporting high-peak power; Comprise: the lightning protection module, EMI filtration module, rectification filtering module, the main transformer that connect successively change circuit module, secondary commutation filtration module, Voltage Feedback module; The input of said lightning protection module connects alternating current, and the output of secondary commutation filtration module connects load, and said Voltage Feedback module is connected to IC PIN2 pin through photoelectrical coupler; It is characterized in that said IC PIN2 pin is through resistance or voltage-stabiliser tube ground connection.
2. the Switching Power Supply of output high-peak power as claimed in claim 1 is characterized in that, the resistance of said resistance is 10K.
3. according to claim 1 or claim 2 the Switching Power Supply of output high-peak power is characterized in that the voltage stabilizing value of said voltage-stabiliser tube is 4.8V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201071689U CN202524284U (en) | 2012-03-21 | 2012-03-21 | Switch power supply capable of outputting high peak power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201071689U CN202524284U (en) | 2012-03-21 | 2012-03-21 | Switch power supply capable of outputting high peak power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524284U true CN202524284U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201071689U Expired - Lifetime CN202524284U (en) | 2012-03-21 | 2012-03-21 | Switch power supply capable of outputting high peak power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202524284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426377A (en) * | 2013-09-03 | 2015-03-18 | 聚龙股份有限公司 | Wide-input voltage flyback-type switch power supply applicable to drive of direct-current motor |
| CN104467441A (en) * | 2014-12-24 | 2015-03-25 | 全天自动化能源科技（东莞）有限公司 | Auxiliary power circuit for photovoltaic inverter |
-
2012
- 2012-03-21 CN CN2012201071689U patent/CN202524284U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426377A (en) * | 2013-09-03 | 2015-03-18 | 聚龙股份有限公司 | Wide-input voltage flyback-type switch power supply applicable to drive of direct-current motor |
| CN104426377B (en) * | 2013-09-03 | 2017-02-08 | 聚龙股份有限公司 | Wide-input voltage flyback-type switch power supply applicable to drive of direct-current motor |
| CN104467441A (en) * | 2014-12-24 | 2015-03-25 | 全天自动化能源科技（东莞）有限公司 | Auxiliary power circuit for photovoltaic inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |