CN203337807U - Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup - Google Patents
Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup Download PDFInfo
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- CN203337807U CN203337807U CN2013204379376U CN201320437937U CN203337807U CN 203337807 U CN203337807 U CN 203337807U CN 2013204379376 U CN2013204379376 U CN 2013204379376U CN 201320437937 U CN201320437937 U CN 201320437937U CN 203337807 U CN203337807 U CN 203337807U
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Abstract
The utility model relates to a current-constant power supply, especially to a circuit capable of inhibiting overvoltage locking protection for a current-constant power supply during startup, which aims at solving the problem that the current-constant power supply cannot normally work and age due to the overvoltage locking protection which occurs during startup and is caused by work sequential difference between the current-constant power supply and an electronic load module. The circuit comprises the current-constant power supply, a detection module, a control module, a clamping module and a switch module, wherein the current-constant power supply is respectively connected with the detection module, the control module and the clamping module, the control module is connected with the switch module, and the switch module is respectively connected with the current-constant power supply and the clamping module. According to the utility model, the clamping module clamps an input voltage, and the clamping module is disconnected within a short time after clamping, thereby inhibiting overvoltage locking protection for the current-constant power supply during startup. The circuit of the utility model is especially suitable for power supplies employing energy feedback system aging products.
Description
Technical field
The utility model relates to constant-current supply, particularly realizes that start suppresses constant-current supply over-voltage locking defencive function circuit.
Background technology
The aging product of energy resource feedback system for power acquisition, do not support the constant-current supply inversion because of system, must be converted into constant voltage source.The electronic load module that adopts constant current conversion constant voltage circuit to make, there is a distinct disadvantage in it.Because electronic load module response time (200mS) and constant-current supply rise time (50mS) do not mate, the former obviously is longer than the latter.Cause constant-current supply start large because module does not load input impedance in time, the constant-current supply output voltage rises and triggers the over-voltage locking protection, thereby causes power supply can't normal boot-strap aging.To this, during start, need to the over-voltage locking defencive function of constant-current supply be suppressed, and have an over-voltage locking defencive function effective, reliable, constant-current supply when simply circuit is to start in prior art, do not suppressed.
The utility model content
Technical problem to be solved in the utility model; the over-voltage locking protection occurred in the start caused because of work schedule difference with the electronic load intermodule for constant-current supply exactly; the problem that cisco unity malfunction is aging; provide a kind of the start to suppress the circuit of power supply over-voltage locking defencive function; suppressed by the over-voltage locking defencive function to constant-current supply, make power supply can normal boot-strap aging.
The utility model solve the technical problem; the technical scheme adopted is; realize that start suppresses constant-current supply over-voltage locking defencive function circuit; comprise constant-current supply; it is characterized in that, also comprise detection module, control module, clamper module and switch module, described constant-current supply is connected with detection module, control module and clamper module respectively; described control module is connected with switch module, and described switch module is connected with constant-current supply and clamper module respectively.
Concrete, the anode of described constant-current supply, negative terminal are respectively as the port be connected with load.
Concrete, described detection module is voltage detecting circuit.
Concrete, described control module is single-chip microcomputer.
Concrete, the coil anode of described relay is connected with the output terminal of single-chip microcomputer, and the coil negative terminal of relay is connected with an end of the normally closed contact of the negative terminal of constant-current supply and relay respectively, and the other end of the normally closed contact of relay is connected with the clamper module.
Concrete, described clamper module is the TVS diode, and the negative pole of described TVS diode is connected with the output terminal of constant-current supply, and the positive pole of TVS diode is connected with the normally closed contact other end of relay.
The beneficial effects of the utility model are; suppress constant-current supply over-voltage locking defencive function circuit by above-mentioned start; when such aging of product start; the clamper module is connected in parallel on the constant-current supply two ends input voltage is carried out to clamper; in short time after clamper, the clamper module disconnects, constant-current supply over-voltage locking defencive function in the time of so just can realizing suppressing start.And the utility model circuit has simple in structure, be easy to realize the reliability high.
The accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is embodiment circuit block diagram of the present utility model.
Wherein, A means constant-current supply, and D means the TVS diode.
Embodiment
Below in conjunction with accompanying drawing, describe the technical solution of the utility model in detail.
The over-voltage locking protection that the utility model occurs in the start caused because of work schedule difference with the electronic load intermodule for constant-current supply, the problem that cisco unity malfunction is aging, provide a kind of the start to suppress the circuit of constant-current supply over-voltage locking defencive function, as shown in Figure 1, schematic diagram of the present utility model comprises constant-current supply A, also comprises detection module, control module, clamper module and switch module; Described constant-current supply A is connected with detection module, control module and clamper module respectively; Described control module is connected with switch module; Described switch module is connected with constant-current supply A and clamper module respectively.By the clamper module, output voltage is carried out to clamper while starting shooting by constant-current supply A, and disconnect at short notice the connection of clamper module, realize that electronic load module normal operation band carries, and does not trigger the protection of constant-current supply A over-voltage locking.
Embodiment
This routine circuit block diagram as shown in Figure 2; this start suppresses constant-current supply over-voltage locking defencive function circuit; anode by constant-current supply A is connected with the input end of voltage detecting circuit, the negative pole of TVS diode D respectively; the output terminal of voltage detecting circuit is connected with the input end of single-chip microcomputer; the output terminal of single-chip microcomputer is connected with the anode of relay coil; the negative terminal of relay coil is connected with an end of the normally closed contact of the negative terminal of constant-current supply A and relay respectively, and the positive pole of TVS diode D and the normally closed contact other end of relay connect to form.The anode of constant-current supply, negative terminal are respectively as the port be connected with load, but the utility model does not comprise load.Single Chip Microcomputer (SCM) program is provided with threshold voltage, when constant-current supply A does not start shooting, the single-chip microcomputer output low level, relay is in normally off, and TVS diode D is attempted by the positive and negative two ends of constant-current supply A, after energising, voltage detecting circuit detects the input voltage of constant-current supply A, and the signal of detection is sent into to single-chip microcomputer, when output voltage surpasses the clamp voltage of TVS diode D, TVS diode D carries out clamper to voltage.When voltage detecting circuit detects input voltage and reaches the program setting threshold values, single-chip microcomputer is exported high level after the delay routine setting-up time, drives relay to transfer off-state to by normally off, and TVS diode D disconnects.Realize the inhibition of constant-current supply over-voltage locking defencive function during to start with this.
Claims (6)
1. realize that start suppresses constant-current supply over-voltage locking defencive function circuit; comprise constant-current supply; it is characterized in that; also comprise detection module, control module, clamper module and switch module; described constant-current supply is connected with detection module, control module and clamper module respectively; described control module is connected with switch module, and described switch module is connected with constant-current supply and clamper module respectively.
2. realization start according to claim 1 suppresses constant-current supply over-voltage locking defencive function circuit, it is characterized in that, the anode of described constant-current supply, negative terminal are respectively as the port be connected with load.
3. realization start according to claim 1 suppresses constant-current supply over-voltage locking defencive function circuit, it is characterized in that, described detection module is voltage detecting circuit.
4. realization start according to claim 1 suppresses constant-current supply over-voltage locking defencive function circuit, it is characterized in that, described control module is single-chip microcomputer.
5. realization start according to claim 1 suppresses constant-current supply over-voltage locking defencive function circuit; it is characterized in that; described switch module is relay; the coil anode of described relay is connected with the output terminal of single-chip microcomputer; the coil negative terminal of relay is connected with an end of the normally closed contact of the negative terminal of constant current source and relay respectively, and the other end of the normally closed contact of relay is connected with the clamper module.
6. suppress constant-current supply over-voltage locking defencive function circuit according to claim 1,2,3,4 or 5 described realization starts; it is characterized in that; described clamper module is the TVS diode; the negative pole of described TVS diode is connected with the anode of constant current source, and the positive pole of TVS diode is connected with the other end of the normally closed contact of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204379376U CN203337807U (en) | 2013-07-22 | 2013-07-22 | Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204379376U CN203337807U (en) | 2013-07-22 | 2013-07-22 | Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203337807U true CN203337807U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204379376U Expired - Lifetime CN203337807U (en) | 2013-07-22 | 2013-07-22 | Circuit capable of inhibiting overvoltage locking protection for current-constant power supply during startup |
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| Country | Link |
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| CN (1) | CN203337807U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452078A (en) * | 2016-10-21 | 2017-02-22 | 上海汽车集团股份有限公司 | Control method for constant current mode of DC/DC converter |
| CN108896896A (en) * | 2018-05-10 | 2018-11-27 | 浙江八达电子仪表有限公司 | A kind of TVS pipe clamp voltage test fixture based on the unification of four table of state's net |
-
2013
- 2013-07-22 CN CN2013204379376U patent/CN203337807U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452078A (en) * | 2016-10-21 | 2017-02-22 | 上海汽车集团股份有限公司 | Control method for constant current mode of DC/DC converter |
| CN106452078B (en) * | 2016-10-21 | 2019-04-23 | 上海汽车集团股份有限公司 | A kind of DC/DC converter constant current mode control method |
| CN108896896A (en) * | 2018-05-10 | 2018-11-27 | 浙江八达电子仪表有限公司 | A kind of TVS pipe clamp voltage test fixture based on the unification of four table of state's net |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |