CN1076792A - Switching Power Supply control, driving circuit that cost performance is high - Google Patents
Switching Power Supply control, driving circuit that cost performance is high Download PDFInfo
- Publication number
- CN1076792A CN1076792A CN 92108358 CN92108358A CN1076792A CN 1076792 A CN1076792 A CN 1076792A CN 92108358 CN92108358 CN 92108358 CN 92108358 A CN92108358 A CN 92108358A CN 1076792 A CN1076792 A CN 1076792A
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- power supply
- switching power
- circuit
- driving circuit
- supply control
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Abstract
A kind of Switching Power Supply control, driving circuit comprise signal generator 1, width modulation, overcurrent protection output circuit 2, low-voltage power supply circuit 3, output detection circuit 5 etc.It is core component that the present invention has adopted two 555 type time-base integrated circuits, and external a few components has been finished the major function of switching power supply thick film integrated circuit.
Description
The present invention relates to a kind of supply unit, specifically: be a kind of performance height, cost low Switching Power Supply control, driving circuit.
Switching Power Supply is owing to have the efficient height, volume is little, in light weight, advantages such as voltage stabilized range is wide, therefore be widely used in many occasions, for example: be widely used in colour television set and computer etc., yet, because of the price relation, more employing auto-excitation type in the general televisor, though element is less, circuit is simpler, but they all have the shortcoming of oneself, and some shortcoming has also been brought problems such as use inconvenience, and is charged as base plate, loads change can not be too big etc., the separated exciting Switching Power Supply of better performances is because special-purpose integrated thick-film piece price is higher and damage the back maintenance difficult, with general universal component circuit structure more complicated, element is more, so popularization and application is restricted.
The purpose of this invention is to provide a kind of performance good, simple in structure, cheap Switching Power Supply control, driving circuit.
Technical solution of the present invention is to adopt universal components and parts, and two 555 type time-base integrated circuits are core, constitutes switching signal generation, width modulation, overcurrent protection and driving circuit, directly drives high power valve.
Advantage of the present invention is: 1. owing to be core with 555 universal type time-base integrated circuits as signal generation, width modulation, overcurrent protection and driving; make cost have only 20% of switch power special thick film piece of the same type; it is easy to use to make the present invention have a low-cost .2.; can be according to the suitable high power valve of different output power adapteds; long service life .3. width modulation scope is big; output is stable, high .4. is simple in structure for precision, and is easy to implement.
In sum, the present invention includes functions such as signal generation, width modulation, overcurrent protection, driving, is that core is finished by two 555 type time-base integrated circuits, is the new parts that the present invention has the prior art of differing from.
The present invention has the following drawings to be implemented:
Fig. 1. be the calcspar of the invention process in Switching Power Supply.
Fig. 2. be the electrical block diagram of the invention process in Switching Power Supply.
According to Fig. 1. Fig. 2. provided a better embodiment of the present invention, I will give detailed description to this embodiment, so that ins and outs of the present invention further are provided.
Seeing also Fig. 1. the present invention is 1 in turn; connect primary power 2; power drive 3; transformer 4; output detects 5; form a Switching Power Supply; it is that power supply 2 gets in turn that circuit connects; provide one to start power supply to 1; signal takes place; width modulation; driving circuit 1; driving power pipe 3 and transformer 4; produce alternating magnetic field; transformer secondary output gets; detect 5 through output and feed back to 1; and provide 1 working power. from Fig. 2 as seen; primary power 2 is general common structure; to the direct rectification of civil power; filtering becomes direct supply. transformer 4; output detects 5; be general circuit common; highlighting signal takes place; width modulation; drive 1; by BG111; R111; D111 forms the startup feed circuit; 555 type time-base integrated circuit IC121; R121; R122; C121; C122 forms signal generator; produce a real control than very big pulse signal; pass through R131; C131 time constant and R132; the charge discharging resisting that BG131 forms; be connected in the IC151 input end; IC151 is connected into not gate; utilize the stronger driving force of 555 type time-base integrated circuits; direct driving power pipe 3, the photoelectronic coupler IC511 of cross-over connection on R131 detects 5 by output, obtains a pulsewidth and adjusts signal; thereby changed R131; the time constant that C131 forms; make the IC151 output pulse width obtain changing BG141; BG142; R141; R142 forms current foldback circuit, and the voltage on R311 reaches and triggers the BG142 conducting; BG141 follows conducting; IC151 is forced to reset, after secondary coil voltage is set up, and BG161; R161; D161 provides circuit work power.
Claims (4)
1, a kind of Switching Power Supply control, driving circuit comprise in turn being that core constitutes with signal generation, width modulation, driving circuit by two 555 type time-base integrated circuits.
2, it is characterized in that according to the described circuit of claim 1 R132 connects the BG131B utmost point, the E utmost point of BG131, the C utmost point connect IC151 input end and ground, make charge discharging resisting.
3, according to the described circuit of claim 1, it is characterized in that the IC511 cross-over connection in R131, form the pulsewidth adjustment.
4, according to the described circuit of claim 1, it is characterized in that the BG141 cross-over connection in VCC and IC151 input end, by the sampling of BG142, make strong disconnected unit to R311.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108358 CN1076792A (en) | 1992-03-23 | 1992-03-23 | Switching Power Supply control, driving circuit that cost performance is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92108358 CN1076792A (en) | 1992-03-23 | 1992-03-23 | Switching Power Supply control, driving circuit that cost performance is high |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1076792A true CN1076792A (en) | 1993-09-29 |
Family
ID=4943469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92108358 Pending CN1076792A (en) | 1992-03-23 | 1992-03-23 | Switching Power Supply control, driving circuit that cost performance is high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1076792A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040823C (en) * | 1994-07-21 | 1998-11-18 | 三星电机株式会社 | Switch mode power supply with control of output supply voltage and overcurrent |
| CN100392967C (en) * | 2002-03-28 | 2008-06-04 | Tdk株式会社 | Control circuit for switching power supply device and switching power supply device used therewith |
| CN102624233A (en) * | 2012-02-08 | 2012-08-01 | 魏传永 | Low-power switching power supply made of time-base circuit |
| CN104935191A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Composite logic protection amplifying type mixed triggering power source for detecting power faults |
-
1992
- 1992-03-23 CN CN 92108358 patent/CN1076792A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040823C (en) * | 1994-07-21 | 1998-11-18 | 三星电机株式会社 | Switch mode power supply with control of output supply voltage and overcurrent |
| CN100392967C (en) * | 2002-03-28 | 2008-06-04 | Tdk株式会社 | Control circuit for switching power supply device and switching power supply device used therewith |
| CN102624233A (en) * | 2012-02-08 | 2012-08-01 | 魏传永 | Low-power switching power supply made of time-base circuit |
| CN104935191A (en) * | 2014-11-27 | 2015-09-23 | 成都雷克尔科技有限公司 | Composite logic protection amplifying type mixed triggering power source for detecting power faults |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |