CN203747790U - Protection circuit for power output - Google Patents
Protection circuit for power output Download PDFInfo
- Publication number
- CN203747790U CN203747790U CN201320656080.7U CN201320656080U CN203747790U CN 203747790 U CN203747790 U CN 203747790U CN 201320656080 U CN201320656080 U CN 201320656080U CN 203747790 U CN203747790 U CN 203747790U
- Authority
- CN
- China
- Prior art keywords
- low
- drive circuit
- pin
- end drive
- circuit
- 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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Abstract
The utility model discloses a protection circuit for a power output, and the protection circuit comprises a high-end drive circuit, a low-end drive circuit, and a controller which controls the on-off of the high-end and low-end drive circuits. An external load is connected between the high-end drive circuit and the low-end drive circuit. The protection circuit provided by the utility model effectively manages a power drive circuit through the series connection of the high-end and low-end drive circuits. No matter whether the load is independently in a short-circuit state or turned off through driving, the effective control can be carried out quickly, thereby guaranteeing the safety of the power control circuit.
Description
Technical field
The utility model relates to protective circuit technical field, relates in particular to a kind of power stage protective circuit.
Background technology
In industrial control process, exist such power control section to divide, in the time that appearance is abnormal, need to close in time output and drive, common way is on control loop, to be connected in series emergency switch, in the time there is emergency, manual-lock.The shortcoming of the method is automatically to control, and causes control hysteresis, and has increased the complexity of system.
Utility model content
The utility model is mainly to solve existing technical problem in prior art, thus the power stage protective circuit that provides a kind of rapid enforcement effectively to control.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Power stage protective circuit of the present utility model; it comprises high-end drive circuit, low-side driver circuitry; and control the controller of described high-end drive circuit, low-side driver circuitry break-make, wherein, between described high-end drive circuit and low-side driver circuitry, also connect the load of an outside.
Further, described high-end drive circuit comprises the first chip, first, second diode, the 1st pin ground connection of described the first chip, its the 2nd pin is connected with the P10 pin of described controller through the first diode, its the 3rd pin is connected with+24V power supply, its the 5th pin is connected with the negative electrode of the second diode, the DO1 end of load, the plus earth of described the second diode.
Further, described low-side driver circuitry comprises metal-oxide-semiconductor, resistance, the 3rd triode, the grid of described metal-oxide-semiconductor is connected with the P11 pin of described controller through resistance, its drain electrode is connected with the anode of described the 3rd triode, the DO2 end of load, its source ground, wherein, the negative electrode of described the 3rd triode is connected with+24V power supply.
Compared with prior art, the utility model has the advantage of: no matter by high-end and series connection low-side driver circuitry, effectively power driving circuit is managed, be that load self short circuit or demand motive are closed, all can implement rapidly effective control, guarantee the safety of power control circuit.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of power stage protective circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made to more explicit defining.
Consult shown in Fig. 1; power stage protective circuit of the present utility model; it comprises high-end drive circuit 1, low-side driver circuitry 2; and control the controller 3 of high-end drive circuit 1, low-side driver circuitry 2 break-makes; wherein, between high-end drive circuit 1 and low-side driver circuitry 2, also connect the load 4 of an outside.
Wherein, high-end drive circuit 1 comprises the first chip U1, first, second diode (D1, D2), the 1st pin ground connection of the first chip U1, its the 2nd pin is connected with the P10 pin of controller 3 through the first diode D1, its the 3rd pin is connected with+24V power supply, its the 5th pin is connected with the negative electrode of the second diode D2, the DO1 end of load 4, the plus earth of the second diode D2.
Low-side driver circuitry 2 comprises metal-oxide-semiconductor U2, resistance R 1, the 3rd triode D3, the grid of metal-oxide-semiconductor U2 is connected with the P11 pin of controller 3 through resistance R 1, its drain electrode is connected with the anode of the 3rd triode D3, the DO2 end of load 4, its source ground, wherein, the negative electrode of the 3rd triode D3 is connected with+24V power supply.
In the utility model, in the time of needs switching off load, can turn-off high-end drive circuit 1 and low-side driver circuitry 2 simultaneously, or both one of, unless both all can not turn-off, otherwise all can switching off load, so just improved the reliability of power stage.The utility model, by high-end and series connection low-side driver circuitry, is managed power driving circuit effectively, no matter is that load self short circuit or demand motive are closed, and all can implement rapidly effective control, guarantees the safety of power control circuit.
The above, be only embodiment of the present utility model, but protection range of the present utility model is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claims were limited.
Claims (1)
1. a power stage protective circuit, it is characterized in that: comprise high-end drive circuit (1), low-side driver circuitry (2), and control the controller (3) of described high-end drive circuit (1), low-side driver circuitry (2) break-make, wherein, between described high-end drive circuit (1) and low-side driver circuitry (2), also connect the load (4) of an outside;
Described high-end drive circuit (1) comprises the first chip (U1), first, second diode (D1, D2), the 1st pin ground connection of described the first chip (U1), its the 2nd pin is connected with the P10 pin of described controller (3) through the first diode (D1), its the 3rd pin is connected with+24V power supply, its the 5th pin is connected with the negative electrode of the second diode (D2), the DO1 end of load (4), the plus earth of described the second diode (D2);
Described low-side driver circuitry (2) comprises metal-oxide-semiconductor (U2), resistance (R1), the 3rd triode (D3), the grid of described metal-oxide-semiconductor (U2) is connected with the P11 pin of described controller (3) through resistance (R1), its drain electrode is connected with the anode of described the 3rd triode (D3), the DO2 end of load (4), its source ground, wherein, the negative electrode of described the 3rd triode (D3) is connected with+24V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656080.7U CN203747790U (en) | 2013-10-23 | 2013-10-23 | Protection circuit for power output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320656080.7U CN203747790U (en) | 2013-10-23 | 2013-10-23 | Protection circuit for power output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203747790U true CN203747790U (en) | 2014-07-30 |
Family
ID=51347540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320656080.7U Expired - Fee Related CN203747790U (en) | 2013-10-23 | 2013-10-23 | Protection circuit for power output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203747790U (en) |
-
2013
- 2013-10-23 CN CN201320656080.7U patent/CN203747790U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20151023 |
|
| EXPY | Termination of patent right or utility model |