CN217643787U

CN217643787U - PMOS-controlled double-circuit switchable car lamp module control circuit

Info

Publication number: CN217643787U
Application number: CN202220925883.7U
Authority: CN
Inventors: 张德坚; 方洁苗; 杨武
Original assignee: ZHEJIANG YUYANG ELECTRONICS CO Ltd
Current assignee: ZHEJIANG YUYANG ELECTRONICS CO Ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-10-21
Anticipated expiration: 2032-04-19

Abstract

The utility model discloses a changeable car light module control circuit of double-circuit of PMOS control for car light circuit switches, including power input circuit, power conversion circuit, short-distance beam input circuit, distance beam input circuit and car light drive circuit. The utility model discloses a changeable car light module control circuit of double-circuit of PMOS control, it is through far-reaching headlamp input circuit and passing light input circuit's switching, thereby utilized passing light work at the far-reaching headlamp during operation, utilized the passing light when increasing far-reaching headlamp luminance, greatly increased illumination intensity, and reduced the far-reaching headlamp under the condition of having satisfied far-reaching headlamp illumination intensity and used lamp pearl and control circuit, circuit cost and lamps and lanterns volume have greatly been reduced, the design of the car lamps and lanterns of being convenient for very much is used.

Description

PMOS-controlled double-circuit switchable car lamp module control circuit

Technical Field

The utility model belongs to car lamps and lanterns, concretely relates to changeable car light module control circuit of double-circuit of PMOS control.

Background

In the design of automobile lamps, because various automobiles have greater and greater requirements on the automobile lamps, and the requirements of different automobiles on the lamps are diversified, the automobile lamps have high requirements on the performance of LED elements, mainly have high efficiency, high power and high reliability, and have high light intensity required for luminescence. Therefore, the requirement for the output power of the automobile light source is large, and the high beam and the low beam are required to be switched. The design of independent power supply of the high beam and the low beam is generally adopted in the conventional design, the circuit area is greatly increased, the two paths of lights are independently used and controlled, and the size of the lamp is increased.

Therefore, the above problems are further improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a changeable car light module control circuit of double-circuit of MOS control, it is through far-reaching headlamp input circuit and passing through the switching of passing through the light input circuit, thereby the passing through lamp work has been utilized at far-reaching headlamp during operation, the passing through lamp has been utilized when increasing far-reaching headlamp luminance, the illumination intensity has greatly been increased, and reduced far-reaching headlamp under the condition of having satisfied far-reaching headlamp illumination intensity and used lamp pearl and control circuit, circuit cost and lamps and lanterns volume have greatly been reduced, the car lamps and lanterns design of being convenient for very much use.

In order to achieve the above object, the present invention provides a PMOS controlled dual switchable vehicle lamp module control circuit for switching vehicle lamp circuits, comprising a power input circuit, a power conversion circuit, a low beam input circuit, a high beam input circuit and a vehicle lamp driving circuit, wherein:

the power input circuit is electrically connected with the power conversion circuit, the low beam input circuit, the high beam input circuit and the vehicle lamp driving circuit respectively, and the vehicle lamp driving circuit is electrically connected with the power conversion circuit, the low beam input circuit and the high beam input circuit respectively;

the power input circuit comprises an input unit P1, the power conversion circuit comprises a power conversion control chip U1, the input unit P1 is electrically connected with the power conversion control chip U1, a high beam input end (1 pin) of the input unit P1 is electrically connected with the input end of the high beam input circuit, and a low beam input end (2 pin) of the input unit P2 is electrically connected with the input end of the low beam input circuit.

As a further preferable technical solution of the above technical solution, the low beam input circuit includes a resistor R63, a resistor R64, a resistor R65, and a diode ZD3, and the vehicle lamp driving circuit includes a field effect transistor Q11 (PMOS), a field effect transistor Q10, a low beam LED2, and a high beam LED1, wherein:

a low-beam input end of the input unit P2 is grounded through a diode D4 (a VBUS end is an input voltage) in sequence through a resistor R64 and a resistor R65, two ends of the resistor R64 are connected in parallel with the resistor R63, and two ends of the resistor R65 are connected in parallel with the diode ZD3;

the common connection end of the resistor R64 and the resistor R65 is electrically connected with the grid of the field effect tube Q10 through a resistor R27, the drain of the field effect tube Q10 is electrically connected with the grid of the field effect tube Q11 through a resistor R29, a resistor R28 is connected between the grid and the source of the field effect tube Q11, two ends of the resistor R28 are connected with a capacitor C12 in parallel, one path of the drain of the field effect tube Q11 is electrically connected with the cathode of the diode D4 (as LED-) and the other path of the drain of the field effect tube Q11 is electrically connected with the 16 pins of the power conversion control chip U1 (as LED +) through the high beam LED1 and the dipped headlight LED2 in sequence, and the source of the field effect tube Q11 is also electrically connected with the common connection end of the high beam LED1 and the dipped headlight LED 2.

As a further preferred technical solution of the above technical solution, the high beam input circuit includes a diode D5, a resistor R25 and a triode Q9, the high beam input end of the input unit P2 is electrically connected to the base of the triode Q9 sequentially through the diode D5 and the resistor R25, the collector of the triode Q9 is electrically connected to the gate of the field effect transistor Q10, and the emitter of the triode Q9 and the source of the field effect transistor Q10 are both grounded.

As a further preferable technical solution of the above technical solution, the high beam input end of the input unit P2 is further grounded through a diode TVS2 (bidirectional breakdown), and two ends of the diode TVS2 are connected in parallel with a resistor R30, the high beam input end of the input unit P2 is further grounded through a diode D2 and a capacitor EC1 (as a VBUS end), two ends of the diode D2 are connected in parallel with a diode D3, and two ends of the capacitor EC1 are connected in parallel with a capacitor C13 (a cathode of the diode D3 is electrically connected to the 16 pins of the power conversion control chip U1 through an inductor L1, a diode D6 and a resistor R56 in sequence, two ends of the diode D6 are connected in parallel with a diode D7, two ends of the resistor R56 are respectively connected in parallel with a resistor R55 and a resistor R57, and the resistor R56 is further connected in series between the 20 pin and the 19 pin of the power conversion control chip U1).

As a further preferable technical solution of the above technical solution, the low beam input end of the input unit P2 is further grounded through a diode TVS1 (bidirectional breakdown), and two ends of the diode TVS1 are connected in parallel with a resistor R31.

The beneficial effects of the utility model reside in that:

1. the power supply control panel has smaller devices and volume and lower cost.

2. The power control is simpler, and the light switches the single-path control and can.

3. The quantity of light sources required by the whole lamp is reduced, the heat dissipation volume is synchronously reduced, the whole size of the lamp is reduced, and the universality is improved.

Drawings

Fig. 1 is a schematic diagram of the dual-path switchable car light module control circuit controlled by PMOS of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

The utility model discloses a changeable car light module control circuit of double-circuit of PMOS control combines preferred embodiment below, further describes utility model's concrete embodiment.

In the embodiments of the present invention, those skilled in the art will note that the low beam lamp and the high beam lamp, etc. of the present invention can be regarded as the prior art.

Preferred embodiments.

The utility model discloses a changeable car light module control circuit of double-circuit of PMOS control for car light circuit switches, including power input circuit, power conversion circuit, short-distance beam input circuit, distance light input circuit and car light drive circuit, wherein:

the power supply input circuit is electrically connected with the power conversion circuit, the low beam input circuit, the high beam input circuit and the vehicle lamp driving circuit respectively, and the vehicle lamp driving circuit is electrically connected with the power conversion circuit, the low beam input circuit and the high beam input circuit respectively;

Specifically, the dipped headlight input circuit includes a resistor R63, a resistor R64, a resistor R65 and a diode ZD3, and the vehicle lamp driving circuit includes a field-effect transistor Q11 (PMOS), a field-effect transistor Q10, a dipped headlight LED2 and a high beam LED1, wherein:

a low-beam input end of the input unit P2 is grounded through a diode D4 (a VBUS end is an input voltage) and a resistor R64 in sequence, two ends of the resistor R64 are connected with the resistor R63 in parallel, and two ends of the resistor R65 are connected with the diode ZD3 in parallel;

More specifically, the high beam input circuit includes a diode D5, a resistor R25 and a transistor Q9, the high beam input end of the input unit P2 is electrically connected to the base of the transistor Q9 sequentially through the diode D5 and the resistor R25, the collector of the transistor Q9 is electrically connected to the gate of the field effect transistor Q10, and the emitter of the transistor Q9 and the source of the field effect transistor Q10 are both grounded.

Further, the high beam input end of the input unit P2 is grounded through a diode TVS2 (bi-directional breakdown for suppressing the spike of the input voltage abnormality and preventing the battery voltage abnormality from damaging the circuit board), and two ends of the diode TVS2 are connected in parallel with a resistor R30, the high beam input end of the input unit P2 is grounded through a diode D2 and a capacitor EC1 (as a VBUS end), two ends of the diode D2 are connected in parallel with a diode D3, and two ends of the capacitor EC1 are connected in parallel with a capacitor C13 (a cathode of the diode D3 is electrically connected to the 16 pins of the power conversion control chip U1 through an inductor L1, a diode D6 and a resistor R56 in sequence, two ends of the diode D6 are connected in parallel with a diode D7, two ends of the resistor R56 are connected in parallel with a resistor R55 and a resistor R57 respectively, and the resistor R56 is connected in series between the 20 pins and the 19 pins of the power conversion control chip U1).

Furthermore, the low-beam input terminal of the input unit P2 is grounded through a diode TVS1 (bi-directional breakdown for suppressing the abnormal spike of the input voltage and preventing the abnormal damage of the battery voltage to the circuit board), and a resistor R31 is connected in parallel to two ends of the diode TVS 1.

The principle of the utility model is that:

the power supply carries out voltage conversion through a power conversion control chip MPQ2484, when the dipped headlight is input for power supply, the power supply is converted from LED + output voltage, VBUS is input voltage at the moment, resistors R63 and R64 form a voltage division circuit, R65 obtains voltage through voltage division, and since the high beam input end has no voltage, R25 has no voltage at the moment, Q9 is cut off and does not work, the grid voltage of Q10 is larger than the power level, Q10 is conducted, R28 and R29 form a voltage division circuit, the source voltage of PMOS Q11 is larger than the grid voltage, PMOS Q11 is conducted, LED1 is short-circuited, the dipped headlight is on, and the high beam is off. When the high beam is input to supply power, R25 has voltage, so that Q9 is switched on, R27 voltage is pulled to 0V, Q10 grid voltage is lower than the source level, Q10 is switched off, the grid voltage of PMOS Q11 is equal to the source level voltage, PMOS Q11 is switched off, and the LED2 and the LED1 are in an open circuit state, so that the high beam and the low beam are simultaneously on. Therefore, the circuit provided by the invention utilizes the dipped headlight to work when the high beam works, utilizes the dipped headlight while increasing the brightness of the high beam, greatly increases the illumination intensity, reduces the number of lamp beads and control loops used by the high beam under the condition of meeting the illumination intensity of the high beam, greatly reduces the circuit cost and the lamp volume, and is very convenient for designing and using the automobile lamp.

It is worth mentioning that the technical features such as dipped headlight and high beam that the utility model discloses the patent application relates to should be regarded as prior art, and the concrete structure of these technical features, theory of operation and the control mode that may involve, spatial arrangement mode adopt the conventional selection in this field can, should not be regarded as the invention point of the utility model discloses a place, the utility model discloses do not further specifically expand the detailing.

It will be apparent to those skilled in the art that modifications and variations can be made in the above-described embodiments, or some features of the invention may be substituted or omitted, and any modification, substitution, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a changeable car light module control circuit of two-way of PMOS control for car light circuit switches, its characterized in that includes power input circuit, power conversion circuit, passing beam input circuit, distance beam input circuit and car light drive circuit, wherein:

the power input circuit comprises an input unit P1, the power conversion circuit comprises a power conversion control chip U1, the input unit P1 is electrically connected with the power conversion control chip U1, a high beam input end of the input unit P1 is electrically connected with an input end of the high beam input circuit, and a low beam input end of the input unit P2 is electrically connected with an input end of the low beam input circuit.

2. The PMOS-controlled two-way switchable vehicular lamp module control circuit as claimed in claim 1, wherein the low beam input circuit comprises a resistor R63, a resistor R64, a resistor R65 and a diode ZD3, and the vehicular lamp driving circuit comprises a field effect transistor Q11, a field effect transistor Q10, a low beam LED2 and a high beam LED1, wherein:

the common connection end of the resistor R64 and the resistor R65 is electrically connected with the grid of the field effect tube Q10 through a resistor R27, the drain of the field effect tube Q10 is electrically connected with the grid of the field effect tube Q11 through a resistor R29, a resistor R28 is connected between the grid and the source of the field effect tube Q11, two ends of the resistor R28 are connected with a capacitor C12 in parallel, one path of the drain of the field effect tube Q11 is electrically connected with the cathode of the diode D4, the other path of the drain of the field effect tube Q11 is electrically connected with the 16 pins of the power conversion control chip U1 through the high beam LED1 and the low beam LED2 in sequence, and the source of the field effect tube Q11 is also electrically connected with the common connection end of the high beam LED1 and the low beam LED 2.

3. The PMOS-controlled two-way switchable vehicle lamp module control circuit according to claim 2, wherein the high beam input circuit comprises a diode D5, a resistor R25 and a transistor Q9, the high beam input end of the input unit P2 is electrically connected with the base of the transistor Q9 sequentially through the diode D5 and the resistor R25, the collector of the transistor Q9 is electrically connected with the gate of the field effect transistor Q10, and the emitter of the transistor Q9 and the source of the field effect transistor Q10 are both grounded.

4. The PMOS-controlled two-way switchable vehicle lamp module control circuit as claimed in claim 3, wherein the high beam input end of the input unit P2 is further grounded through a diode TVS2, and two ends of the diode TVS2 are connected in parallel with a resistor R30, the high beam input end of the input unit P2 is further grounded through a diode D2 and a capacitor EC1, two ends of the diode D2 are connected in parallel with a diode D3, and two ends of the capacitor EC1 are connected in parallel with a capacitor C13.

5. The PMOS-controlled two-way switchable vehicular lamp module control circuit as claimed in claim 4, wherein the low-beam input terminal of the input unit P2 is further grounded through a diode TVS1, and two ends of the diode TVS1 are connected in parallel with a resistor R31.