CN202103578U - Capacitance-resistance step down type switch power supply - Google Patents
Capacitance-resistance step down type switch power supply Download PDFInfo
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- CN202103578U CN202103578U CN2011201334124U CN201120133412U CN202103578U CN 202103578 U CN202103578 U CN 202103578U CN 2011201334124 U CN2011201334124 U CN 2011201334124U CN 201120133412 U CN201120133412 U CN 201120133412U CN 202103578 U CN202103578 U CN 202103578U
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- circuit
- power supply
- capacitance
- switch
- step down
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Abstract
Provided is a capacitance-resistance step down type switch power supply, which is characterized in that: a 220-V power supply is sequentially connected with a capacitor, a resistor, and a diode and then is connected with the input terminal of the capacitance-resistance step down circuit. Meanwhile, the 220-v power supply is also connected with a switch circuit. The output terminal of the capacitance-resistance step down circuit is connected with a one-chip microcomputer which controls the switch circuit. The switch circuit, via a switch transformer, is connected with a voltage stabilizing circuit, with the output terminal of the voltage stabilizing circuit providing voltage to a load. The capacitance-resistance step down type switch power supply enables the circuit power supply to provide power to the one-chip microcomputer via a capacitance-resistance step down circuit. Meanwhile, the circuit power supply provides primary power to the switch transformer. As a triode is employed as the switch, the closing and opening of the switch can be controlled via a one-chip microcomputer. Moreover, the adoption of the switch transformer enables the capacitance-resistance step down type switch power supply to effectively provide stable voltage to the voltage stabilizing circuit. In addition, the capacitance-resistance step down type switch power supply can provide a PWM waveform having fixed frequency and fixed duty ratio. Moreover, the PWM waveform can change the duty ratio and frequency by modifying the program in one-chip microcomputer according to various requirements.
Description
Technical field
The utility model relates to electronic device field, especially a kind of resistance-capacitance depressurization formula Switching Power Supply.
Background technology
The circuit of existing Switching Power Supply is more complicated all generally, need special Switching Power Supply chip for driving, cause cost very high like this, can in the circuit of some heavy loads, use.And some lower powered electronic products adopt this type of Switching Power Supply when needing isolated from power, and then cost is bigger, has influenced the economy of this electronic product, and relatively waste seems.And the volume of such Switching Power Supply is often relatively big, can influence the overall dimension of whole electronic product.
The utility model content
The purpose of the utility model is to provide a kind of cost less for the deficiency that solves above-mentioned technology, and is easy to use and can produce the resistance-capacitance depressurization formula Switching Power Supply of one group of power supply of isolating.
In order to achieve the above object; The resistance-capacitance depressurization formula Switching Power Supply that the utility model designed, 220V power supply are connected the back successively and are being connected with the input of resistance-capacitance depressurization circuit with electric capacity, resistance and diode, be connected with switching circuit simultaneously; The output of resistance-capacitance depressurization circuit is connected with single-chip microcomputer; The Single-chip Controlling switching circuit, switching circuit is connected with voltage stabilizing circuit through switch transformer, and the output of voltage stabilizing circuit provides voltage to load.This design feature has realized circuit power is supplied power to single-chip microcomputer through the resistance-capacitance depressurization circuit, and circuit power is given the elementary power supply of switch transformer simultaneously.
In order to realize control through single-chip microcomputer, in switching circuit, use triode as switch to its switching.
For the voltage of reliable and stable is provided to voltage stabilizing circuit, the employing transformation ratio is 1: 1 a switch transformer.
The resulting resistance-capacitance depressurization formula of the utility model Switching Power Supply is supplied power through the resistance-capacitance depressurization circuit circuit power to single-chip microcomputer, circuit power is given the elementary power supply of switch transformer, the setting of having saved independent current source simultaneously.Adopt triode as switch simultaneously, can control its switching through single-chip microcomputer, convenient.Adopt switch transformer in addition, can effectively stable voltage be provided to voltage stabilizing circuit.This resistance-capacitance depressurization formula power supply can provide the PWM waveform of a fixed frequency and fixed duty cycle simultaneously, and this PWM waveform can change duty ratio and frequency through update routine according to different needs in single-chip microcomputer.It is simple that this resistance-capacitance depressurization formula Switching Power Supply has a circuit, and cost is low, characteristics such as subjective strong operability.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Combine accompanying drawing that the utility model is done further to describe through embodiment below.
Embodiment 1:
Resistance-capacitance depressurization formula Switching Power Supply as shown in Figure 1, that present embodiment is described, 220V power supply successively with capacitor C
2, resistance R
2With diode D
1Connect the back and be connected with the input of resistance-capacitance depressurization circuit 2, be connected with switching circuit 1 simultaneously, the output of resistance-capacitance depressurization circuit 2 is connected with single-chip microcomputer 4, single-chip microcomputer 4 control switch circuit 1, and switching circuit 1 is through switch transformer B
1Be connected with voltage stabilizing circuit 3, the output of voltage stabilizing circuit 3 provides voltage to load.
In order to realize control, in switching circuit 1, use triode Q to its switching through single-chip microcomputer 4
1As switch.
For the voltage of reliable and stable being provided for voltage stabilizing circuit 3, the employing transformation ratio is 1: 1 switch transformer B
1
Claims (3)
1. resistance-capacitance depressurization formula Switching Power Supply; It is characterized in that the 220V power supply is connected with the input of resistance-capacitance depressurization circuit with electric capacity, resistance with after diode is connected successively again; Be connected with switching circuit simultaneously, the output of resistance-capacitance depressurization circuit is connected with single-chip microcomputer, the Single-chip Controlling switching circuit; Switching circuit is connected with voltage stabilizing circuit through switch transformer, and the output of voltage stabilizing circuit provides voltage to load.
2. resistance-capacitance depressurization formula Switching Power Supply according to claim 1 is characterized in that using in the switching circuit triode as switch.
3. resistance-capacitance depressurization formula Switching Power Supply according to claim 1 and 2 is characterized in that it is 1: 1 that described switch transformer adopts transformation ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201334124U CN202103578U (en) | 2011-04-29 | 2011-04-29 | Capacitance-resistance step down type switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201334124U CN202103578U (en) | 2011-04-29 | 2011-04-29 | Capacitance-resistance step down type switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202103578U true CN202103578U (en) | 2012-01-04 |
Family
ID=45389576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201334124U Expired - Lifetime CN202103578U (en) | 2011-04-29 | 2011-04-29 | Capacitance-resistance step down type switch power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202103578U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856033A (en) * | 2012-11-28 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Diode protection circuit |
-
2011
- 2011-04-29 CN CN2011201334124U patent/CN202103578U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103856033A (en) * | 2012-11-28 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Diode protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG YONGTAILONG ELECTRONIC CO., LTD. Free format text: FORMER NAME: ZHEJIANG YONGTAILONG ELECTRONICS CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 314500, No. 8, Kangding Road, Tongxiang Economic Development Zone, Indus street, Tongxiang, Zhejiang, Jiaxing Patentee after: Zhejiang Yongtailong Electronic Co., Ltd. Address before: 314500 No. 8, Kangding Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang Patentee before: Zhejiang Yongtailong Electronics Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120104 |