CN207410318U - Improve the exciting circuit of power field effect pipe driving voltage - Google Patents
Improve the exciting circuit of power field effect pipe driving voltage Download PDFInfo
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- CN207410318U CN207410318U CN201721425047.8U CN201721425047U CN207410318U CN 207410318 U CN207410318 U CN 207410318U CN 201721425047 U CN201721425047 U CN 201721425047U CN 207410318 U CN207410318 U CN 207410318U
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Abstract
The utility model discloses it is a kind of improve power field effect pipe driving voltage exciting circuit, including：BMS battery management systems voltage output end, microcontroller, energy storage capacitor C1, power input, overvoltage protection resistance R1, R2, R3, R4, voltage stabilizing chip U1, power field effect pipe Q1；The pulse width modulation (PWM) output terminal that the BMS battery management systems voltage output end passes through energy storage capacitor C1 connection microcontrollers；The voltage output end that the power field effect pipe Q1 passes through overvoltage protection resistance R4 connection voltage stabilizing chips U1；The power input that the BMS battery management systems voltage output end passes through overvoltage protection resistance R1 connection voltage stabilizing chips U1；The power input VCC is powered by overvoltage protection resistance R2, R3 to the voltage stabilizing chip U1.The utility model solve voltage reduction situation can not driving power field-effect tube situation, circuit structure is simple, easy to adjust, has the advantages that the output burning voltage and high and low ripple of precision, manageable.
Description
Technical field
The utility model is related to field-effect tube technical field more particularly to a kind of improve power field effect pipe driving voltage
Exciting circuit.
Background technology
The application field of power field effect pipe is more and more extensive, and the driving circuit of composition is to influence entire electronic circuit system
The important factor of stability of uniting and reliability, the G poles driving requirement of different size power field effect pipe are also variant.In power field
In the G poles driving requirement of effect pipe, wherein there is a technical characteristic parameter Vgs（th）, the threshold voltage of usual low pressure field-effect tube
Vgs（th）Within 4V, high pressure field-effect tubeThen usually between 3-5V, driving circuit must meet's
It is required that the work that circuit ability is reliable and stable.
However, in the existing use environment of scene effect pipe, the common VCC supply voltages of MCU are within 5V, in addition inside
Conduction voltage drop and peripheral drive circuit loss, eventually arrive at power field effect pipe and arriveVoltage may only have 4V or
The lower voltage of person, if using simple driving circuit, some power field effect pipes are just present with the phenomenon that driving is insufficient, by
Low in driving voltage, field-effect tube does not have saturation conduction, but in magnifying state, DS voltages are high, and electric current is larger, at this time power
The loss of field-effect tube is very big, can seriously cross cause thermal damage, ultimately result in circuit malfunction.And in the metal-oxide-semiconductor conducting of high-side driver
Source voltage is identical with drain voltage (VCC), so at this moment grid voltage is bigger 4V than VCC or 10V.If in same system
In, the voltage bigger than VCC is obtained it is necessary to special booster circuit.Many motor drivers are all integrated with charge pump, but this
It can cause the raising of design cost, be unfavorable for the sale of product.
Therefore, the prior art needs to improve.
Utility model content
The utility model embodiment technical problem to be solved is：A kind of raising power field effect pipe driving is provided
The exciting circuit of voltage, to solve problems of the prior art.
According to the one side of the utility model embodiment, a kind of raising power field effect pipe driving voltage provided swashs
Circuit is encouraged, including：
BMS battery management systems voltage output end, microcontroller, energy storage capacitor C1, power input, overvoltage protection resistance
R1, R2, R3, R4, voltage stabilizing chip U1, power field effect pipe Q1；
The pulse width modulation that the BMS battery management systems voltage output end passes through energy storage capacitor C1 connection microcontrollers
PWM output terminals；
The voltage output end that the power field effect pipe Q1 passes through overvoltage protection resistance R4 connection voltage stabilizing chips U1；
The BMS battery management systems voltage output end is defeated by the power supply of overvoltage protection resistance R1 connection voltage stabilizing chips U1
Enter end, for driving power field-effect tube Q1, when the output voltage of the BMS battery management systems voltage output end can not drive
During power field effect pipe Q1, the pulse width modulation (PWM) output terminal of the microcontroller is used to drive by the energy storage capacitor C1
Power field effect pipe Q1；
The power input VCC is powered by overvoltage protection resistance R2, R3 to the voltage stabilizing chip U1.
In another embodiment of exciting circuit based on the above-mentioned raising power field effect pipe driving voltage of the utility model,
The voltage stabilizing chip U1 is SC71501 chips.
In another embodiment of exciting circuit based on the above-mentioned raising power field effect pipe driving voltage of the utility model,
The output voltage of the pulse width modulation (PWM) output terminal of the microcontroller is 3.3V.
In another embodiment of exciting circuit based on the above-mentioned raising power field effect pipe driving voltage of the utility model,
The BMS battery management systems voltage output end is two batteries being serially connected.
Compared with prior art, the utility model includes advantages below：
The utility model improves power by increasing driving voltage in BMS battery management systems voltage output ends, with this
The driving voltage of field-effect tube makees the voltage of detection BMS battery management system voltage output ends by microcontroller, when detecting electricity
When pressure can not provide driving power field-effect tube, microcontroller uses the way of output of pulse width modulation (PWM), utilizes accumulation of energy electricity
Hold, BMS battery management system voltage output terminal voltages are increased to energy driving power field-effect tube voltage, by the voltage after raising
By the voltage stabilizing chip U1 voltages exported power field effect pipe is supplied to be used as driving voltage, so as to solve the feelings of voltage reduction
Condition can not driving power field-effect tube situation so that whole system design is easy to adjust using simple, and there is output to stablize electricity
Pressure and the high and low ripple of precision, manageable advantage.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or the attached drawing used in description of the prior art does one and simply introduces, it should be apparent that, the accompanying drawings in the following description is this reality
With some new embodiments, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the circuit of one embodiment of the exciting circuit of the raising power field effect pipe driving voltage of the utility model
Figure.
Specific embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's all other embodiments obtained without making creative work all belong to
In the scope of the utility model protection.
With reference to the accompanying drawings and examples to a kind of raising power field effect pipe driving voltage provided by the utility model
Exciting circuit is described in more detail.
Fig. 1 is the circuit of one embodiment of the exciting circuit of the raising power field effect pipe driving voltage of the utility model
Figure, as shown in Figure 1, the exciting circuit of the raising power field effect pipe driving voltage of the embodiment includes：
BMS battery management systems voltage output end, microcontroller, energy storage capacitor C1, power input, overvoltage protection resistance
R1, R2, R3, R4, voltage stabilizing chip U1, power field effect pipe Q1；
The pulse width modulation that the BMS battery management systems voltage output end passes through energy storage capacitor C1 connection microcontrollers
PWM output terminals；
The voltage output end that the power field effect pipe Q1 passes through overvoltage protection resistance R4 connection voltage stabilizing chips U1；
The BMS battery management systems voltage output end is defeated by the power supply of overvoltage protection resistance R1 connection voltage stabilizing chips U1
Enter end, for driving power field-effect tube Q1, when the output voltage of the BMS battery management systems voltage output end can not drive
During power field effect pipe Q1, the pulse width modulation (PWM) output terminal of the microcontroller is used to drive by the energy storage capacitor C1
Power field effect pipe Q1；
The power input VCC is powered by overvoltage protection resistance R2, R3 to the voltage stabilizing chip U1.
The voltage stabilizing chip U1 is SC71501 chips.The output electricity of the pulse width modulation (PWM) output terminal of the microcontroller
It presses as 3.3V, the BMS battery management systems voltage output end can be two batteries being serially connected.
In specific implementation process, operation principle is：When the voltage of BMS battery management system voltage output ends drops to
During below 5V, undertension is to provide the driving voltage of field-effect tube, and microcontroller is started to work, the pulse width tune of microcontroller
The driving voltage of PWM output terminals output 3.3V processed, the driving voltage of power field effect pipe is lifted to 8.3V by 5V, by measuring work(
The both end voltage of rate field-effect tube, it is known that when driving voltage is high, field-effect tube saturation conduction, between drain electrode and source electrode
There is not the phenomenon that driving deficiency close to zero in voltage.It is thereby achieved that detection BMS battery managements system is made by microcontroller
The voltage of system voltage output end, when detecting that voltage can not provide driving power field-effect tube, microcontroller uses pulse width
The way of output of modulation (PWM), using energy storage capacitor, BMS battery management system voltage output terminal voltages, which are increased to, can drive work(
Voltage after raising is supplied to power field effect pipe to be used as drive by rate field-effect tube voltage by the voltage stabilizing chip U1 voltages exported
Dynamic voltage, so as to solve the situation of voltage reduction can not driving power field-effect tube situation.
A kind of exciting circuit for improving power field effect pipe driving voltage provided by the utility model is carried out above
It is discussed in detail, specific case used herein is set forth the principle and embodiment of the utility model, implements above
The explanation of example is only intended to help the method and its core concept for understanding the utility model；Meanwhile for the general skill of this field
Art personnel, according to the thought of the utility model, there will be changes in specific embodiments and applications, to sum up institute
It states, this specification content should not be construed as the limitation to the utility model.
Finally it should be noted that：The above is only the preferred embodiment of the utility model only, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical solution recorded in foregoing embodiments or to which part technical characteristic
Equivalent substitution is carried out, within the spirit and principle of the utility model, any modifications, equivalent replacements and improvements are made,
It should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of exciting circuit for improving power field effect pipe driving voltage, which is characterized in that including：
BMS battery management systems voltage output end, microcontroller, energy storage capacitor C1, power input, overvoltage protection resistance R1, R2,
R3, R4, voltage stabilizing chip U1, power field effect pipe Q1；
The BMS battery management systems voltage output end is defeated by the pulse width modulation (PWM) of energy storage capacitor C1 connection microcontrollers
Outlet；
The voltage output end that the power field effect pipe Q1 passes through overvoltage protection resistance R4 connection voltage stabilizing chips U1；
The power input that the BMS battery management systems voltage output end passes through overvoltage protection resistance R1 connection voltage stabilizing chips U1
End, for driving power field-effect tube Q1, when the output voltage of the BMS battery management systems voltage output end can not drive work(
During rate field-effect tube Q1, the pulse width modulation (PWM) output terminal of the microcontroller is used to drive work(by the energy storage capacitor C1
Rate field-effect tube Q1；
The power input VCC is powered by overvoltage protection resistance R2, R3 to the voltage stabilizing chip U1.
2. the exciting circuit according to claim 1 for improving power field effect pipe driving voltage, which is characterized in that described steady
It is SC71501 chips to press chip U1.
3. the exciting circuit according to claim 1 for improving power field effect pipe driving voltage, which is characterized in that the list
The output voltage of the pulse width modulation (PWM) output terminal of piece machine is 3.3V.
4. the exciting circuit according to claim 1 for improving power field effect pipe driving voltage, which is characterized in that described
BMS battery management systems voltage output end is two batteries being serially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425047.8U CN207410318U (en) | 2017-10-31 | 2017-10-31 | Improve the exciting circuit of power field effect pipe driving voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425047.8U CN207410318U (en) | 2017-10-31 | 2017-10-31 | Improve the exciting circuit of power field effect pipe driving voltage |
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| Publication Number | Publication Date |
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| CN207410318U true CN207410318U (en) | 2018-05-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612535A (en) * | 2017-10-31 | 2018-01-19 | 东莞博力威电池有限公司 | Improve the exciting circuit of power field effect pipe driving voltage |
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2017
- 2017-10-31 CN CN201721425047.8U patent/CN207410318U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612535A (en) * | 2017-10-31 | 2018-01-19 | 东莞博力威电池有限公司 | Improve the exciting circuit of power field effect pipe driving voltage |
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| CP03 | Change of name, title or address |
Address after: 523000 Tongsha New Industrial Park, Dongcheng Street, Dongguan City, Guangdong Province Patentee after: Guangdong Boliwei Technology Co., Ltd. Address before: 523000 new industrial zone, Dongcheng District, Guangdong, Dongguan Patentee before: DongGuan Greenway Battery Co., Ltd. |