CN2657290Y - Power supply sequential control circuit - Google Patents
Power supply sequential control circuitInfo
- Publication number
- CN2657290Y CN2657290Y CN 03207474 CN03207474U CN2657290Y CN 2657290 Y CN2657290 Y CN 2657290Y CN 03207474 CN03207474 CN 03207474 CN 03207474 U CN03207474 U CN 03207474U CN 2657290 Y CN2657290 Y CN 2657290Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- power supply
- channel mos
- control circuit
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Voltage And Current In General (AREA)
Abstract
The utility model provides a low cost power timing control circuit which comprises a P channel MOS transistor. The P channel MOS transistor is serially connected with an output terminal of the power timing control circuit. The outputting is through a drain of the P channel MOS transistor. A first resistor and a second resistor which are sequential are connected between a source of the P channel MOS transistor and ground. And a third resistor and a fourth resistor which are sequential are connected between a reference power and ground. Positive and negative input terminal of a comparator are connected between the first resistor and the second resistor and between the third resistor and the fourth resistor respectively. The output terminal of the comparator is connected with a gate of the P channel MOS transistor. A shunting resistor is connected in parallel between the source and the gate of the P channel MOS transistor. The power timing control circuit of the utility model has a simple structure, a lower cost and a good delaying effect which is an economical timing control circuit with low cost.
Description
Technical field
The utility model relates to electronic technology field, refers to a kind of power supply sequencing control circuit especially.
Background technology
Along with electronic technology development with rapid changepl. never-ending changes and improvements; industry has also proposed various requirements to the power supply that uses; for example in the power supply supply of veneer, running into the duplicate supply electrifying timing sequence through regular meeting needs controlled requirement, promptly requires road power supply in the duplicate supply to postpone other one road power supply output.
In order to satisfy this requirement, prior art adopts a kind of timing controller of special use to realize, though use this timing controller can realize controlling the purpose of electrifying timing sequence, because this timing controller manufacturing cost height, complex procedures, the incompatibility large tracts of land is promoted the use of.
Technology contents
The utility model provides a kind of power supply sequencing control circuit cheaply, to solve manufacturing cost height, the complex procedures problem that exists in the prior art.
The technical solution of the utility model is:
A kind of power supply sequencing control circuit, this control circuit with the output delay of this power supply sequential in reference power supply, wherein:
This control loop includes the P channel MOS tube, this P channel MOS tube is connected in series in the output of described power supply sequential, through its drain electrode output, be connected with first resistance, second resistance that are connected in series between the source electrode of this P channel MOS tube and the ground, and be connected with the 3rd resistance, the 4th resistance that is connected in series between described reference power supply and the ground;
Between this first resistance and second resistance, between the 3rd resistance and the 4th resistance, be connected with the positive-negative input end of comparator respectively, the output of this comparator links to each other with the grid of this P channel MOS tube, also is parallel with shunt resistance between the source electrode of this P channel MOS tube and grid.
Described the 4th resistance two ends are parallel with an electric capacity, and this electric capacity and the 4th resistance form a delay circuit.
The utility model is by being connected on the P channel MOS tube in the output major loop of power supply sequential, and reasonably select the parameter of other components and parts, thereby obtain required delay time parameter, the output delay that so just can realize this power supply sequential is in the reference power supply sequential.The power supply sequencing control circuit that the utility model provides, simple in structure, with low cost, delay effect is good, is a kind of economical and practical, sequential control circuit cheaply.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment power supply sequencing control;
Fig. 2 is the circuit diagram of another embodiment power supply sequencing control of the utility model.
Embodiment
For the clear structure of the present utility model of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:
In the one-board power supply design process, run into the demand of duplicate supply (be following waiting delay time power supply Vin1, reference power supply Vin2) electrifying timing sequence through regular meeting; at this moment; the two-way power supply may be imported simultaneously or successively, and wherein the sequential time delay of any one road power supply is in another road power supply certain time interval.
The described a kind of power supply sequencing control circuit of the utility model embodiment, as shown in Figure 1, this control loop includes P channel MOS tube Q, this P channel MOS tube Q is connected in series in the output of described power supply sequential Vin1, through its drain D output, be connected with first resistance R 1, second resistance R 2 that are connected in series between the source S of this P channel MOS tube Q and the ground, and be connected with the 3rd resistance R 3, the 4th resistance R 4 that is connected in series between described reference power supply Vin2 and the ground;
Between this first resistance R 1 and second resistance R 2, between the 3rd resistance R 3 and the 4th resistance R 4, be connected with the positive-negative input end of comparator U respectively, the output of this comparator U links to each other with the grid G of this P channel MOS tube Q, also is parallel with shunt resistance R5 between the source S of this P channel MOS tube and grid G.
The key point of present embodiment power supply sequencing control circuit: at first be reasonably to select comparator U, require comparator U to have enough output driving forces to be used for driving P channel MOS tube Q; Next is reasonably to select divider resistance, and promptly the resistance of first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 just can satisfy different sequential requirements.
The concrete course of work of present embodiment power supply sequencing control circuit is as follows: P channel MOS tube Q is connected on the output loop of the power supply Vin1 that waits to delay time, the source S that is about to P channel MOS tube Q links to each other with the output of the power supply Vin1 that waits to delay time, load links to each other with veneer with its drain D, reference power supply Vin2 is connected an end of the 3rd resistance R 3, at this moment:
Wait to delay time the Vin2 of power source voltage Vin1 and reference power supply respectively after the dividing potential drop through first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, distinguish positive pole and the negative pole of input comparator U again, when the input voltage of comparator U negative pole is higher than anodal input voltage, comparator U output low level, drive P channel MOS tube Q, P channel MOS tube Q conducting, thus make this power supply output of waiting to delay time, realize the purpose that this power supply sequential time delay of waiting to delay time powers in the reference power supply sequential.
Certainly, can increase a capacitor C who is used for the control lag time in circuit, thereby effectively electric delay is gone up in control, physical circuit as shown in Figure 2, in circuit, increase a RC delay circuit, after the Vin2 input, at first capacitor C is charged, the negative pole of comparator U still keeps low level, after the capacitor C charging is finished, comparator U cathode voltage rises, comparator U output low level, thus drive P channel MOS tube Q conducting.Its time of delay of this moment like this can be by reasonably selecting capacitor C and R3 by the time constant decision of capacitor C 1, R3/R4, and the parameter of R4 just can realize the control to required time of delay.
Claims (3)
1, a kind of power supply sequencing control circuit is characterized in that:
This control loop includes the P channel MOS tube, this P channel MOS tube is connected in series in the output of described power supply sequential, through its drain electrode output, be connected with first resistance, second resistance that are connected in series between the source electrode of this P channel MOS tube and the ground, and be connected with the 3rd resistance, the 4th resistance that is connected in series between described reference power supply and the ground;
Between this first resistance and second resistance, between the 3rd resistance and the 4th resistance, be connected with the positive-negative input end of comparator respectively, the output of this comparator links to each other with the grid of this P channel MOS tube, also is parallel with shunt resistance between the source electrode of this P channel MOS tube and grid.
2, a kind of according to claim 1 power supply sequencing control circuit is characterized in that: described the 4th resistance two ends are parallel with an electric capacity, and this electric capacity and the 4th resistance form a delay circuit.
3, a kind of as claimed in claim 1 or 2 power supply sequencing control circuit is characterized in that: described comparator is a voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207474 CN2657290Y (en) | 2003-08-19 | 2003-08-19 | Power supply sequential control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03207474 CN2657290Y (en) | 2003-08-19 | 2003-08-19 | Power supply sequential control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2657290Y true CN2657290Y (en) | 2004-11-17 |
Family
ID=34324583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03207474 Expired - Fee Related CN2657290Y (en) | 2003-08-19 | 2003-08-19 | Power supply sequential control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2657290Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963792A (en) * | 2010-10-29 | 2011-02-02 | 珠海市鑫和电器有限公司 | Time sequence control circuit and control method thereof |
| CN102265682A (en) * | 2011-06-13 | 2011-11-30 | 华为技术有限公司 | Power supply control method and device of minus gate voltage power valve, power amplification device and base station |
| CN102487274A (en) * | 2010-12-04 | 2012-06-06 | 鸿富锦精密工业（深圳）有限公司 | Time delay circuit and time sequence controller provided with same |
| CN103280968A (en) * | 2013-05-09 | 2013-09-04 | 中国电子科技集团公司第二十四研究所 | Timing control circuit of pulse power supply |
| CN104834245A (en) * | 2014-11-21 | 2015-08-12 | 中航华东光电有限公司 | Power on timing sequence control circuit and display |
| CN105679218A (en) * | 2016-01-21 | 2016-06-15 | 昆山龙腾光电有限公司 | Time delay circuit and test tool |
| CN107529676A (en) * | 2017-08-16 | 2018-01-02 | 中国电子科技集团公司第十八研究所 | A kind of space power system charge control current foldback circuit |
| CN110890072A (en) * | 2019-12-04 | 2020-03-17 | 中山大学 | Self-powered electronic paper drive circuit and electronic paper display equipment |
| CN111354388A (en) * | 2020-03-06 | 2020-06-30 | Tcl华星光电技术有限公司 | Time sequence control module and power management chip |
| CN111434018A (en) * | 2017-12-07 | 2020-07-17 | Fdk株式会社 | Switching power supply |
| CN112526897A (en) * | 2020-12-15 | 2021-03-19 | 安徽皖通邮电股份有限公司 | Control device and control method for power supply time sequence |
-
2003
- 2003-08-19 CN CN 03207474 patent/CN2657290Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963792B (en) * | 2010-10-29 | 2012-08-22 | 珠海市鑫和电器有限公司 | Time sequence control circuit and control method thereof |
| CN101963792A (en) * | 2010-10-29 | 2011-02-02 | 珠海市鑫和电器有限公司 | Time sequence control circuit and control method thereof |
| CN102487274A (en) * | 2010-12-04 | 2012-06-06 | 鸿富锦精密工业（深圳）有限公司 | Time delay circuit and time sequence controller provided with same |
| CN102265682B (en) * | 2011-06-13 | 2014-04-30 | 华为技术有限公司 | Power supply control method and device of minus gate voltage power valve, power amplification device and base station |
| CN102265682A (en) * | 2011-06-13 | 2011-11-30 | 华为技术有限公司 | Power supply control method and device of minus gate voltage power valve, power amplification device and base station |
| WO2012171159A1 (en) * | 2011-06-13 | 2012-12-20 | 华为技术有限公司 | Power supply control method and device of negative grid-voltage power tube, power amplifier apparatus, and base station as the same |
| CN103280968B (en) * | 2013-05-09 | 2015-10-28 | 中国电子科技集团公司第二十四研究所 | The sequential control circuit of the pulse power |
| CN103280968A (en) * | 2013-05-09 | 2013-09-04 | 中国电子科技集团公司第二十四研究所 | Timing control circuit of pulse power supply |
| CN104834245A (en) * | 2014-11-21 | 2015-08-12 | 中航华东光电有限公司 | Power on timing sequence control circuit and display |
| CN104834245B (en) * | 2014-11-21 | 2018-09-04 | 中航华东光电有限公司 | A kind of power-on time sequence control circuit and display |
| CN105679218A (en) * | 2016-01-21 | 2016-06-15 | 昆山龙腾光电有限公司 | Time delay circuit and test tool |
| CN107529676A (en) * | 2017-08-16 | 2018-01-02 | 中国电子科技集团公司第十八研究所 | A kind of space power system charge control current foldback circuit |
| CN111434018A (en) * | 2017-12-07 | 2020-07-17 | Fdk株式会社 | Switching power supply |
| CN110890072A (en) * | 2019-12-04 | 2020-03-17 | 中山大学 | Self-powered electronic paper drive circuit and electronic paper display equipment |
| CN111354388A (en) * | 2020-03-06 | 2020-06-30 | Tcl华星光电技术有限公司 | Time sequence control module and power management chip |
| CN112526897A (en) * | 2020-12-15 | 2021-03-19 | 安徽皖通邮电股份有限公司 | Control device and control method for power supply time sequence |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041117 Termination date: 20100819 |