CN103683244A - Power loop driving circuit and current-limiting method of solid-state power controller - Google Patents
Power loop driving circuit and current-limiting method of solid-state power controller Download PDFInfo
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- CN103683244A CN103683244A CN201310646071.4A CN201310646071A CN103683244A CN 103683244 A CN103683244 A CN 103683244A CN 201310646071 A CN201310646071 A CN 201310646071A CN 103683244 A CN103683244 A CN 103683244A
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Abstract
The invention provides a power loop driving circuit of a solid-state power controller. The power loop driving circuit comprises a driving chip which is provided with a control signal input pin for receiving control signals, a driving signal output pin for outputting driving signals and a state indicating pin. A second capacitor C22 is connected in parallel between the state indicating pin and a COM pin. The state indicating pin is connected in series with a third resistor R32 and a fourth resistor R33 and then is connected to a signal ground. The two ends of the fourth resistor R33 are connected in parallel with a third capacitor C32 and a first voltage-regulator tube V5. The COM pin is connected with the signal ground. Output of the driving signal output pin is divided into two paths, the driving signals are output to an external circuit through one path, and the other path is connected in series with a second resistor R20 and a first resistor R21 and then is connected with the signal ground. The two ends of the first resistor R21 are connected in parallel with a fourth capacitor C24 and a second voltage-regulator tube V4. The power loop driving circuit of the solid-state power controller has the advantages of being easy and convenient to achieve, high in reliability, power loop currents are effectively limited, the anti-jamming capacity of the solid-state power controller (SSPC) is improved, and the load adaptability of the SSPC is enhanced.
Description
Technical field
The invention relates to loop of power circuit drive circuit and the current-limiting method of the drive circuit of solid-state power controller, particularly a kind of solid-state power controller.
Background technology
China's aircraft power system still adopts distribution system in centralized at present, and along with developing rapidly of aeronautical technology, traditional mechanical switch can not satisfy the demands, and with solid-state power controller (calling SSPC in the following text), as switching device, becomes the first selection.Compare with conventional electrical switch have that response is fast, electromagnetic interference is little, the life-span is long, reliability is high, protection curve accurately, without arcing phenomenon and be convenient to the advantages such as computer remote control.
SSPC has protection outlet line and power consumption equipment, prevents because of the harness damage that causes of overload and the function of other harm.But traditional SSPC does not possess current-limiting function, the impact that the SSPC with short-circuit protection mechanism is easily subject to the peak current that circuit moment passes through triggers protection fast, system often to these moment peak current insensitive, and do not wish that SSPC cuts off the power supply to load, has the antijamming capability that current-limiting function solid-state power controller can improve SSPC; Power consumption equipment input has equivalent input capacitance; at SSPC, open moment and cause surge current; if surpassing short-circuit protection point electric current, this electric current will cause that SSPC protects fast; traditional SSPC is without current-limiting function; ability with capacitive load is lower, has limited to a great extent the range of application of SSPC.
Summary of the invention
The problem that the invention will solve is to provide a kind of loop of power circuit drive circuit and current-limiting method of solid-state power controller, the SSPC with current-limiting function can be by short-circuit current limitation within the scope of rated value, prevent that the maximum that electric current surpasses power device from bearing electric current and causing device failure, in the fail safe that strengthens SSPC, also greatly improved SSPC band capacitance load capability.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: the loop of power circuit drive circuit of solid-state power controller, comprise a driving chip, this driving chip is provided with the control signal input pin of reception control signal, the driver output pin of output drive signal and state indication pin; The second capacitor C 22 in parallel between described state indication pin and COM pin, this state indication pin is connected after the 3rd resistance R 32 and the 4th resistance R 33 and is connect signal ground; The 4th resistance R 33 two ends are parallel with the 3rd capacitor C 32 and the first voltage-stabiliser tube V5; COM pin connects signal ground; Drive the output of signal output pin to be divided into two-way, a road direction external circuit output drive signal, connect after the second resistance R 20 and the first resistance R 21 and connect signal ground, the first resistance R 21 two ends the 4th capacitor C 24 in parallel and the second voltage-stabiliser tube V4 in another road.
Further, this driving chip is IR2125.
Further, the 3rd pin of IR2125 is that control signal input pin, the 14 pin are that driver output pin, the 4th pin are that state indication pin and the 5th pin are COM pins; Between the 4th pin and the 5th pin, after the second capacitor C 22, the four pins series connection the 3rd resistance R 32 in parallel and the 4th resistance R 33, connect signal ground; The 4th resistance R 33 two ends are parallel with the 3rd capacitor C 32 and the first voltage-stabiliser tube V5; The 5th pin connects signal ground; The output of the 14 pin is divided into two-way, a road direction external circuit output drive signal, and connect after the second resistance R 20 and the first resistance R 21 and connect signal ground in another road, the first resistance R 21 two ends the 4th capacitor C 24 in parallel and the second voltage-stabiliser tube V4; The external circuits of the first pin divides two-way, and a road meets power supply Q, connects after the first capacitor C 23 and connect signal ground in a road; After the 16 pin series connection the 3rd voltage-stabiliser tube V3, meet power supply Q, the 16 pin connects the negative electrode of the 3rd voltage-stabiliser tube V3; The 3rd voltage-stabiliser tube V3 meet respectively power supply Q and series connection connects signal ground after the first capacitor C 23.
Utilize the method for the loop of power circuit drive circuit current limliting of this solid-state power controller, drive the control signal input pin of chip to receive on/off order; When control signal input pin is high level, the voltage VCC of driver output pin out-put supply Q, driven MOS FET is open-minded, and when control signal input pin is low level, driver output pin output voltage is 0V, and MOSFET turn-offs; Detect the voltage that drives chip the 13 pin, if while reaching cut-in voltage, carry out the operation of the off time of waiting for 500ns ± 10ns; If being still greater than, the voltage of the 13 pin opens voltage, gate drive voltage by loop of power circuit current limit in preset value, this preset value determines by the sampling resistor between the 13 pin and the 12 pin, if sampling resistor is 0.23 ohm, electric current will be limited to 1A; The voltage that detects the 13 pin has or not over-current signal, if there is over-current signal, state indication pin will be exported 100uA charging current on capacitor C 22; If the loss of voltage of the 13 pin detected, charging current will be terminated, MOSFET keeps opening state constant, if the 13 pin detected, keep high level, capacitor C 22 both end voltage are greater than 1.8V, driver output pin voltage is 0, the voltage of state indication pin be VCC in order to indication fault, the time t=C22*1.8V/100uA that current limliting process is lasting.
Further, cut-in voltage is 230mV ± 5mV.
Advantage and good effect that the invention has are: utilize the loop of power circuit drive circuit that drives chip to form, improve load applicability and the antijamming capability of SSPC, can be by short-circuit current limitation in rated range, prevent that the maximum that electric current surpasses power device from bearing electric current and causing device failure.Have and realize simple and conveniently, reliability is high, has effectively limited loop of power circuit electric current, has not only improved the antijamming capability of SSPC but also has strengthened the feature of the workload-adaptability of SSPC.After testing, without the SSPC of current-limiting function, the band capacitive loading capability when spectrum is 1～3A is 220 μ F.The band capacitive loading capability of the SSPC of these innovation and creation when rated current is 1～3A reaches 3500 μ F.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the loop of power circuit drive circuit of solid-state power controller.
Embodiment
With embodiment, the technical scheme of the invention is described in detail by reference to the accompanying drawings.
As shown in Figure 1, the 3rd pin of IR2125 is that control signal input pin, the 14 pin are that driver output pin, the 4th pin are that state indication pin and the 5th pin are COM pins; Between the 4th pin and the 5th pin, after the second capacitor C 22, the four pins series connection the 3rd resistance R 32 in parallel and the 4th resistance R 33, connect signal ground; The 4th resistance R 33 two ends are parallel with the 3rd capacitor C 32 and the first voltage-stabiliser tube V5; The 5th pin connects signal ground; The output of the 14 pin is divided into two-way, a road direction external circuit output drive signal, and connect after the second resistance R 20 and the first resistance R 21 and connect signal ground in another road, the first resistance R 21 two ends the 4th capacitor C 24 in parallel and the second voltage-stabiliser tube V4; The external circuits of the first pin divides two-way, and a road meets power supply Q, connects after the first capacitor C 23 and connect signal ground in a road; After the 16 pin series connection the 3rd voltage-stabiliser tube V3, meet power supply Q, the 16 pin connects the negative electrode of the 3rd voltage-stabiliser tube V3; The 3rd voltage-stabiliser tube V3 meet respectively power supply Q and series connection connects signal ground after the first capacitor C 23.
The course of work of this drive circuit is as follows: drive the control signal input pin of chip to receive on/off order; When control signal input pin is high level, the voltage VCC of driver output pin out-put supply Q, driven MOS FET is open-minded, and when control signal input pin is low level, driver output pin output voltage is 0V, and MOSFET turn-offs; Detect the voltage that drives chip the 13 pin, if while reaching 230mV, carry out the operation of the off time of waiting for 500ns; If the voltage of the 13 pin is still greater than, open voltage, gate drive voltage is by loop of power circuit current limit in preset value, and this preset value is determined by the sampling resistor between the 13 pin and the 12 pin; If sampling resistor is 0.23 ohm, electric current will be limited to 1A, the time t=C22*1.8V/100uA that current limliting process is lasting.The voltage that detects the 13 pin has or not over-current signal, if there is over-current signal, state indication pin will be exported 100uA charging current on capacitor C 22; If the loss of voltage of the 13 pin detected, charging current will be terminated, MOSFET keeps opening state constant, if the 13 pin detected, keep high level, capacitor C 22 both end voltage are greater than 1.8V, driver output pin voltage is 0, and the voltage of state indication pin is that VCC is in order to indication fault.
Above the embodiment of the invention is had been described in detail, but described content is only the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the invention scope and improvement etc., within all should still belonging to this patent covering scope.
Claims (5)
1. the loop of power circuit drive circuit of solid-state power controller, is characterized in that: comprise a driving chip, this driving chip is provided with the control signal input pin of reception control signal, the driver output pin of output drive signal and state indication pin; The second capacitor C 22 in parallel between described state indication pin and COM pin, this state indication pin is connected after the 3rd resistance R 32 and the 4th resistance R 33 and is connect signal ground; The 4th resistance R 33 two ends are parallel with the 3rd capacitor C 32 and the first voltage-stabiliser tube V5; COM pin connects signal ground; Drive the output of signal output pin to be divided into two-way, a road direction external circuit output drive signal, connect after the second resistance R 20 and the first resistance R 21 and connect signal ground, the first resistance R 21 two ends the 4th capacitor C 24 in parallel and the second voltage-stabiliser tube V4 in another road.
2. the loop of power circuit drive circuit of solid-state power controller according to claim 1, is characterized in that: this driving chip is IR2125.
3. the loop of power circuit drive circuit of solid-state power controller according to claim 2, is characterized in that: the 3rd pin of IR2125 is that control signal input pin, the 14 pin are that driver output pin, the 4th pin are that state indication pin and the 5th pin are COM pins; Between the 4th pin and the 5th pin, after the second capacitor C 22, the four pins series connection the 3rd resistance R 32 in parallel and the 4th resistance R 33, connect signal ground; The 4th resistance R 33 two ends are parallel with the 3rd capacitor C 32 and the first voltage-stabiliser tube V5; The 5th pin connects signal ground; The output of the 14 pin is divided into two-way, a road direction external circuit output drive signal, and connect after the second resistance R 20 and the first resistance R 21 and connect signal ground in another road, the first resistance R 21 two ends the 4th capacitor C 24 in parallel and the second voltage-stabiliser tube V4; The external circuits of the first pin divides two-way, and a road meets power supply Q, connects after the first capacitor C 23 and connect signal ground in a road; After the 16 pin series connection the 3rd voltage-stabiliser tube V3, meet power supply Q, the 16 pin connects the negative electrode of the 3rd voltage-stabiliser tube V3; The 3rd voltage-stabiliser tube V3 meet respectively power supply Q and series connection connects signal ground after the first capacitor C 23.
4. the method for utilizing the loop of power circuit drive circuit current limliting of the solid-state power controller described in any one in claim 1 to 3, is characterized in that: drive the control signal input pin of chip to receive on/off order; When control signal input pin is high level, the voltage VCC of driver output pin out-put supply Q, driven MOS FET is open-minded, and when control signal input pin is low level, driver output pin output voltage is 0V, and MOSFET turn-offs; Detect the voltage that drives chip the 13 pin, if while reaching cut-in voltage, carry out the operation of the off time of waiting for 500ns ± 10ns; If the voltage of the 13 pin is still greater than, open voltage, gate drive voltage is by loop of power circuit current limit in preset value, and this preset value is determined by the sampling resistor between the 13 pin and the 12 pin; The voltage that detects the 13 pin has or not over-current signal, if there is over-current signal, state indication pin will be exported 100uA charging current on capacitor C 22; If the loss of voltage of the 13 pin detected, charging current will be terminated, MOSFET keeps opening state constant, if the 13 pin detected, keep high level, capacitor C 22 both end voltage are greater than 1.8V, driver output pin voltage is 0, the voltage of state indication pin be VCC in order to indication fault, the time t=C22*1.8V/100uA that current limliting process is lasting.
5. the method for the loop of power circuit drive circuit current limliting of solid-state power controller according to claim 4, is characterized in that: cut-in voltage is 230mV ± 5mV.
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| CN201310646071.4A CN103683244A (en) | 2013-12-03 | 2013-12-03 | Power loop driving circuit and current-limiting method of solid-state power controller |
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Cited By (3)
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| CN106331545A (en) * | 2016-10-31 | 2017-01-11 | 合肥惠科金扬科技有限公司 | Thunder strike-preventive testing mis-protection circuit and TV |
| CN110018370A (en) * | 2019-03-20 | 2019-07-16 | 成都飞机工业（集团）有限责任公司 | A kind of program-controlled oil mass oil temperature simulator |
| CN112886545A (en) * | 2021-02-02 | 2021-06-01 | 北京市科通电子继电器总厂有限公司 | Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331545A (en) * | 2016-10-31 | 2017-01-11 | 合肥惠科金扬科技有限公司 | Thunder strike-preventive testing mis-protection circuit and TV |
| CN106331545B (en) * | 2016-10-31 | 2023-02-14 | 合肥惠科金扬科技有限公司 | Lightning stroke prevention test error protection circuit and television |
| CN110018370A (en) * | 2019-03-20 | 2019-07-16 | 成都飞机工业（集团）有限责任公司 | A kind of program-controlled oil mass oil temperature simulator |
| CN112886545A (en) * | 2021-02-02 | 2021-06-01 | 北京市科通电子继电器总厂有限公司 | Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller |
| CN112886545B (en) * | 2021-02-02 | 2022-02-22 | 北京市科通电子继电器总厂有限公司 | Driving circuit with short-circuit protection function suitable for high-voltage solid-state power controller |
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Application publication date: 20140326 |