CN207354682U - A kind of LED drive circuit of automobile using high power efficiency - Google Patents
A kind of LED drive circuit of automobile using high power efficiency Download PDFInfo
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- CN207354682U CN207354682U CN201721459974.1U CN201721459974U CN207354682U CN 207354682 U CN207354682 U CN 207354682U CN 201721459974 U CN201721459974 U CN 201721459974U CN 207354682 U CN207354682 U CN 207354682U
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Abstract
The utility model discloses a kind of LED drive circuit of automobile using high power efficiency, including rectification circuit, chopper circuit, current limit circuit and constant current voltage stabilizing circuit；AC conversion is direct current by rectification circuit, chopper circuit is connected to the output terminal of rectification circuit, current limit circuit is connected to the output terminal of chopper circuit, and constant current voltage stabilizing circuit is connected to the output terminal of current limit circuit, and the output terminal of constant current voltage stabilizing circuit connects LED to be driven.The resistance heat consumption of the utility model is small, due to adding chopper circuit, it is possible to reduces power consumption as far as possible, and can realize the constant effect of electric current.Since the utility model has the characteristics that such, automotive field use is more suitable for, energy consumption is small, and power efficiency is high, especially meets the requirement of the electric automobile of current trend.
Description
Technical field
It the utility model is related to automobile electrical sub-circuit, and in particular to a kind of LED driving electricity of automobile using high power efficiency
Road.
Background technology
In automotive field, LED lighting technology instead of that traditional caloric value is high, shines typically by fluorescence reaction
Lamps and lanterns.This is because LED lamp has a lot of advantages, such as longer life expectancy, luminous efficiency higher, price are more low.On automobile
There is number of types of lamp to lift crossbeam, including indicator, taillight, dipped headlight and brake lamp, these LED light with hands by LED light source
The role served as is different, and function is different, and different requirements, and the topology of drive circuit are it is also proposed to the power supply driven for it
Structure must fully meet requirement of the LED light to driving power as much as possible.
The LED of automotive field, in the prior art, driving method mainly have two, and one kind is a constant pressure source for multiple
Constant-current source, each constant-current source are individually given and power per paths of LEDs, and this mode LED failure all the way, does not influence the work of other LED, but
Cost is higher.Another kind is directly to use constant current-supplying, and the operation of LED serial or parallel connections, cost is lower, but very flexible.
Utility model content
On the basis of the prior art, the LED the utility model discloses a kind of automobile using high power efficiency drives electricity
Road.
The technical solution of the utility model is as follows：
A kind of LED drive circuit of automobile using high power efficiency, including rectification circuit, chopper circuit, current limit circuit
And constant current voltage stabilizing circuit；
The bridge rectifier that the rectification circuit forms for four diodes；
The chopper circuit includes bleeder circuit, breakdown diode, the triode of NPN type, the first field-effect tube；Described point
Volt circuit includes first resistor, second resistance and the 3rd resistor being in series, this series loop both ends connects the straight of rectification circuit
Flow output terminal；The anode connection first resistor of breakdown diode and the common port of second resistance；3rd resistor is variable resistor；Also
Including the 4th resistance；The cathode of the base stage connection breakdown diode of triode, the collector of triode connect the of the 4th resistance
One end, the output terminal of the second end connection rectification circuit of the 4th resistance, the emitter ground connection of triode；The source of first field-effect tube
The emitter of pole connecting triode, grid connect the common port of the 4th resistance and triode；
The current limit circuit includes the 5th resistance and the 6th resistance being in series, and the both ends of this series loop are connected to
The output terminal of chopper circuit；Further include the second field-effect tube；The output terminal of the source electrode connection chopper circuit of second row effects pipe, grid
Pole connects the common port of the 5th resistance and the 6th resistance；Capacitor is further included, capacitor both ends connect the defeated of current limit circuit
Outlet；
The constant current voltage stabilizing circuit includes voltage-stablizer and the 7th resistance, the input terminal connection current limit electricity of the voltage-stablizer
The output terminal on road, the output terminal of voltage-stablizer connect the first end of the 7th resistance, and the second end of the 7th resistance exports for drive circuit
End, connects LED to be driven.
The advantageous effects of the utility model are：
The resistance heat consumption of the utility model is small, due to adding chopper circuit, it is possible to reduce power consumption as far as possible, and
It can realize the constant effect of electric current.By test, the power efficiency of the utility model, i.e. output power and input power it
Than.More than 80 percent can be reached.Due to the utility model have the characteristics that it is such, be more suitable for automotive field use,
Energy consumption is small, and power efficiency is high, especially meets the requirement of the electric automobile of current trend.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model.
Embodiment
Fig. 1 is the schematic diagram of the utility model.As shown in Figure 1, the utility model includes rectification circuit, chopper circuit, electricity
Flow limiting circuit and constant current voltage stabilizing circuit.
The bridge rectifier that rectification circuit forms for four diode D1~D4.Rectification circuit produces automobile engine
AC power be converted to DC power supply
Chopper circuit includes bleeder circuit, breakdown diode D5, the triode Q1 of NPN type, the first field-effect tube Q2.Partial pressure
Circuit includes first resistor R1, second resistance R2 and the 3rd resistor R3 being in series, this series loop both ends connection rectification circuit
DC output end.The common port of the anode connection first resistor R1 and second resistance R2 of breakdown diode D5.3rd resistor R3
For variable resistor.Further include the 4th resistance R4.The cathode of the base stage connection breakdown diode D1 of triode Q1, the collection of triode Q1
Electrode connects the first end of the 4th resistance R4, and the second end of the 4th resistance R4 connects the output terminal of rectification circuit, triode Q1's
Emitter is grounded.The emitter of the source electrode connecting triode Q1 of first field-effect tube Q2, grid connect the 4th resistance R4 and three poles
The common port of pipe Q1.
Capacitor C is further included, capacitor C both ends connect the output terminal of current limit circuit.
The output voltage of full wave rectifier bridge, through first resistor R1, second resistance R2,3rd resistor R3 partial pressure, and lead to
The adjustment of adjustable resistance 3rd resistor R3 is crossed, the voltage of breakdown diode D1 is led in control, when hitting more than breakdown diode D1
After wearing voltage, triode Q1 conductings, the first field-effect tube Q2 shut-offs.Conversely, when breakdown diode D1 is not breakdown, triode
Q1 pipeline sections, the grid voltage of the first field-effect tube Q2 increase, the first field-effect tube Q2 conductings, capacitor C quick charges at this time, so
Pass through driven LED electric discharges afterwards, LED shines, until next half period of alternating current.
Current limit circuit includes the 5th resistance R5 and the 6th resistance R6 being in series, and the both ends of this series loop are connected to
The output terminal of chopper circuit.Further include the second field-effect tube Q3.The output of the source electrode connection chopper circuit of second row effects pipe Q3
End, grid connect the common port of the 5th resistance R5 and the 6th resistance R6.Current limit circuit is opened by the second field-effect tube Q3's
Voltage is opened, LED drive current is limited in minimum zone to improve the efficiency of whole circuit.
Constant current voltage stabilizing circuit includes voltage-stablizer IC and the 7th resistance R7, the input terminal connection current limit circuit of voltage-stablizer IC
Output terminal, the output terminal of voltage-stablizer IC connects the first end of the 7th resistance R7, and the second end of the 7th resistance R7 is drive circuit
Output terminal, connects LED to be driven.Voltage-stablizer IC and the 7th resistance R7 constitute a current stabilization circuit at the same time.
The resistance heat consumption of the utility model is small, due to adding chopper circuit, it is possible to reduce power consumption as far as possible, and
It can realize the constant effect of electric current.By test, the power efficiency of the utility model can reach more than 80 percent.
Above-described is only the preferred embodiment of the utility model, and the utility model is not limited to above example.Can
To understand, what those skilled in the art directly exported or associated on the premise of the spirit of the utility model and design is not departed from
Oher improvements and changes, are considered as being included within the scope of protection of this utility model.
Claims (1)
1. a kind of LED drive circuit of automobile using high power efficiency, it is characterised in that including rectification circuit, chopper circuit, electric current
Limiting circuit and constant current voltage stabilizing circuit；
The bridge rectifier that the rectification circuit forms for four diodes (D1~D4)；
The chopper circuit includes bleeder circuit, breakdown diode (D5), the triode (Q1) of NPN type, the first field-effect tube
(Q2)；The bleeder circuit includes first resistor (R1), second resistance (R2) and the 3rd resistor (R3) being in series, this connects back
Road both ends connect the DC output end of rectification circuit；The anode connection first resistor (R1) and second resistance of breakdown diode (D5)
(R2) common port；3rd resistor (R3) is variable resistor；Further include the 4th resistance (R4)；The base stage connection of triode (Q1) is hit
The cathode of diode (D1) is worn, the collector of triode (Q1) connects the first end of the 4th resistance (R4), the 4th resistance (R4)
Second end connects the output terminal of rectification circuit, the emitter ground connection of triode (Q1)；The source electrode connection of first field-effect tube (Q2)
The emitter of triode (Q1), grid connect the common port of the 4th resistance (R4) and triode (Q1)；
The current limit circuit includes the 5th resistance (R5) and the 6th resistance (R6) being in series, and the both ends of this series loop connect
It is connected on the output terminal of chopper circuit；Further include the second field-effect tube (Q3)；The source electrode connection copped wave electricity of second row effects pipe (Q3)
The output terminal on road, grid connect the common port of the 5th resistance (R5) and the 6th resistance (R6)；Further include capacitor (C), capacitor
(C) output terminal of both ends connection current limit circuit；
The constant current voltage stabilizing circuit includes voltage-stablizer (IC) and the 7th resistance (R7), the input terminal connection electricity of the voltage-stablizer (IC)
The output terminal of limiting circuit is flowed, the output terminal of voltage-stablizer (IC) connects the first end of the 7th resistance (R7), the 7th resistance (R7)
Second end is drive circuit output terminal, connects LED to be driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721459974.1U CN207354682U (en) | 2017-11-03 | 2017-11-03 | A kind of LED drive circuit of automobile using high power efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721459974.1U CN207354682U (en) | 2017-11-03 | 2017-11-03 | A kind of LED drive circuit of automobile using high power efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207354682U true CN207354682U (en) | 2018-05-11 |
Family
ID=62354494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721459974.1U Active CN207354682U (en) | 2017-11-03 | 2017-11-03 | A kind of LED drive circuit of automobile using high power efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207354682U (en) |
-
2017
- 2017-11-03 CN CN201721459974.1U patent/CN207354682U/en active Active
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