CN208971202U - A kind of circuit reducing quiescent dissipation - Google Patents
A kind of circuit reducing quiescent dissipation Download PDFInfo
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- CN208971202U CN208971202U CN201821813568.5U CN201821813568U CN208971202U CN 208971202 U CN208971202 U CN 208971202U CN 201821813568 U CN201821813568 U CN 201821813568U CN 208971202 U CN208971202 U CN 208971202U
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Abstract
The utility model relates to a kind of circuits for reducing quiescent dissipation, 3.2V power supply is grounded through capacitor C1 and capacitor C2 respectively in circuit, 3.2V power supply connects the port IN and the port EN of chip U1 simultaneously, 3.2V power supply connects the port SW of chip U1 through inductance L1, the port GND of chip U1 is grounded, the port FB of chip U1 is through resistance R2 connecting resistance R1, resistance R1 ground connection, resistance R2 connects the collector of transistor Q1 simultaneously, the emitter of transistor Q1 is grounded, the base stage of transistor Q1 connects 12V trigger circuit, the port SW of chip U1 connects+12V power supply through diode D1, diode D1 is through resistance R3 connecting resistance R2 simultaneously, diode D1 is grounded through capacitor C3, a kind of circuit of reduction quiescent dissipation of the utility model design, control is accurate, stablize Property is strong, securely and reliably.
Description
Technical field
The utility model relates to circuit arrangement field more particularly to a kind of circuits for reducing quiescent dissipation.
Background technique
Currently, single lithium battery charge and discharge are using more and more, such as street lamp energy-storage system, daytime, solar panels passed through control
Device processed charges to battery, and evening battery is used to drive LED light by controller, and in the whole process, controller is neither charging
Seem critically important not power consumption when driving lamp simultaneously, because this is related to that how many energy can be converted into LED light.Previous
Scheme is all that MCU consumes electric current when carrying out standby, learns that quiescent current will consume 47 milliamperes or so by calculating, instantly anxious
Circuit arrangement is needed to reduce power consumption.
Utility model content
The purpose of this utility model is to provide a kind of circuits for reducing quiescent dissipation to be to solve the above technical problems
Realize that above-mentioned purpose the utility model uses following technical scheme:
A kind of circuit reducing quiescent dissipation, 3.2V power supply is grounded through capacitor C1 and capacitor C2 respectively in circuit, 3.2V electricity
Source connects the port IN and the port EN of chip U1 simultaneously, and 3.2V power supply connects the port SW of chip U1, the end GND of chip U1 through inductance L1
The port FB of mouth ground connection, chip U1 is grounded through resistance R2 connecting resistance R1, resistance R1, while resistance R2 connects the current collection of transistor Q1
Pole, the emitter ground connection of transistor Q1, the base stage of transistor Q1 connect 12V trigger circuit, and the port SW of chip U1 is through diode D1
+ 12V power supply is connect, while diode D1 is grounded through resistance R3 connecting resistance R2, diode D1 through capacitor C3.
On that basis of the above technical scheme, the chip U1 uses STM8L type MCU chip.
A kind of circuit of reduction quiescent dissipation of the utility model design is adjusted in boosting link, reduces standby function
Consumption improves circuit operational efficiency, saves circuitry operating cost, while improving the operation stability of equipment, user is facilitated to grasp
Make.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
The utility model is further elaborated in the following with reference to the drawings and specific embodiments.
A kind of circuit reducing quiescent dissipation, 3.2V power supply is grounded through capacitor C1 and capacitor C2 respectively in circuit, 3.2V electricity
Source connects the port IN and the port EN of chip U1 simultaneously, and 3.2V power supply connects the port SW of chip U1, the end GND of chip U1 through inductance L1
The port FB of mouth ground connection, chip U1 is grounded through resistance R2 connecting resistance R1, resistance R1, while resistance R2 connects the current collection of transistor Q1
Pole, the emitter ground connection of transistor Q1, the base stage of transistor Q1 connect 12V trigger circuit, and the port SW of chip U1 is through diode D1
+ 12V power supply is connect, while diode D1 is grounded through resistance R3 connecting resistance R2, diode D1 through capacitor C3.
The chip U1 uses STM8L type MCU chip.
A kind of circuit operation principle of reduction quiescent dissipation of the utility model design: in circuit, L1, U1, D1 composition
BOOST booster circuit, and sampling feedback is carried out by R1, R2, R3, in simple terms, U1 can control VCC12+ network-side
Voltage, so that the voltage at FB is equal to internal reference voltage.The both ends R1 carry out short circuit with a switching tube Q1 or decontrol, when
When Q1 is connected, R1 is short-circuited to GND, is equivalent to only R2 and R3 at this time and participates in feedback, since voltage is always 0.6V at FB, this
When output voltage are as follows:；When Q1 cut-off, R1 and R2, R3 participate in feeding back together, since voltage is always at FB
For 0.6V, output voltage at this time are as follows:；So, by the on-off of control Q1, then cooperate difference
Resistance value, output voltage can be become to 2 grades, output voltage becomes 3.5V and 12V.
When controller is standby, it is only necessary to power to U1, the voltage at VCC12+ network is at this moment tuned into 3.5V, then false
If 10 milliamperes of U1 power consumption, due to being U1 decompression, input current is also 10 milliamperes, 10 milliamperes of 12V power consumption, it is assumed that boosting Link Efficiency
80%, lithium battery voltage 3.2V, then for lithium battery, power consumption isMilliampere；Scheme consumes before
Electricity is 46.9 milliamperes, compared to being greatly lowered.
The above is the utility model preferred embodiment, for the ordinary skill in the art, according to this reality
With novel introduction, in the case where not departing from the principles of the present invention and spirit, the change that is carried out to embodiment is repaired
Change, replacement and variant is still fallen within the protection scope of the utility model.
Claims (2)
1. a kind of circuit for reducing quiescent dissipation, which is characterized in that 3.2V power supply connects through capacitor C1 and capacitor C2 respectively in circuit
Ground, 3.2V power supply connect the port IN and the port EN of chip U1 simultaneously, and 3.2V power supply connects the port SW of chip U1, chip through inductance L1
The port GND of U1 is grounded, and the port FB of chip U1 is grounded through resistance R2 connecting resistance R1, resistance R1, while resistance R2 connects transistor
The collector of Q1, the emitter ground connection of transistor Q1, the base stage of transistor Q1 connect 12V trigger circuit, the port the SW warp of chip U1
Diode D1 connects+12V power supply, while diode D1 is grounded through resistance R3 connecting resistance R2, diode D1 through capacitor C3.
2. a kind of circuit for reducing quiescent dissipation according to claim 1, which is characterized in that the chip U1 is used
STM8L type MCU chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821813568.5U CN208971202U (en) | 2018-11-06 | 2018-11-06 | A kind of circuit reducing quiescent dissipation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821813568.5U CN208971202U (en) | 2018-11-06 | 2018-11-06 | A kind of circuit reducing quiescent dissipation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971202U true CN208971202U (en) | 2019-06-11 |
Family
ID=66760274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821813568.5U Active CN208971202U (en) | 2018-11-06 | 2018-11-06 | A kind of circuit reducing quiescent dissipation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971202U (en) |
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2018
- 2018-11-06 CN CN201821813568.5U patent/CN208971202U/en active Active
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