CN204905959U - Novel car power supply adapter - Google Patents

Abstract

The utility model discloses be suitable for the electron field, provide a novel car power supply adapter, a serial communication port, novel car power supply adapter, include: chip TL3844BDR -8, protection chip ASP3001, resistance, electric capacity, diode, inductance and field effect transistor. The utility model provides a technical scheme has the high advantage of security.

Description

New automobile power supply adaptor

Technical field

The utility model belongs to electronic applications, particularly relates to a kind of new automobile power supply adaptor.

Background technology

Automobile is the current equipment that everybody commonly uses; development of automobile till now; automobile there is numerous electronic equipments; the power supply of existing vehicle electronics provides and is generally storage battery; but existing storage battery needs to carry out step-down process, the adapter of existing storage battery can meet the requirement of step-down, but complicated structure; and protectiveness is not strong, and fail safe is low.

Utility model content

The object of the utility model embodiment is to provide a kind of new automobile power supply adaptor, and it solves the low problem of the fail safe of prior art.

The utility model embodiment realizes like this, on the one hand, a kind of new automobile power supply adaptor is provided, described new automobile power supply adaptor, comprise: chip TL3844BDR-8, protect IC ASP3001, resistance, electric capacity, diode, inductance and field effect transistor, wherein, the positive pole of storage battery connects No. 5 pins of chip TL3844BDR-8, No. 6 pins, No. 7 pins, No. 8 pins, one end of the negative pole contact resistance R1 of storage battery, the other end of resistance R1 connects the other end of electric capacity C5, negative pole of output end ground connection, No. 1 pin of chip TL3844BDR-8, be connected with one end of inductance L 1 after No. 2 pins are connected, the other end of inductance L 1 connects the positive pole of output, No. 3 pins of chip TL3844BDR-8 connect the one end of electric capacity C1 and the electric capacity C2 be connected in parallel, the electric capacity C1 be connected in parallel is connected with one end of inductance L 1 with the other end of electric capacity C2, the anode of diode D1 connects output head anode, the negative electrode of diode D1 connects No. 4 pins of chip TL3844BDR-8,

The other end of the source electrode contact resistance R1 of effect pipe M1, the grid of field effect transistor M1 connects No. 1 pin of protect IC, the drain electrode of field effect transistor M1 connects the drain electrode of field effect transistor M2, and the source electrode of field effect transistor M2 connects No. 3 pins of the grid connection protect IC of output port 2, field effect transistor M2;

One end of No. 2 pin contact resistance R4 of protect IC; the other end of resistance R4 connects output port negative pole; be connected the lower port of the other end connection transformer T1 secondary side of electric capacity C5 with one end of electric capacity C5 after No. 4, No. 5 pins of protect IC are connected; be connected with the other end of resistor group R3 after No. 5 pins of protect IC are connected with No. 6 pins, one end of resistance R3 connects output head anode.

In the utility model embodiment, the technical scheme that the utility model provides provides a kind of brand-new power adapter of the automobile, and this power supply adaptor has the high advantage of fail safe.

Accompanying drawing explanation

The new automobile power adapter circuit figure that Fig. 1 provides for the utility model.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.

The utility model embodiment provides a kind of new automobile power supply adaptor, this new automobile power supply adaptor as shown in Figure 1, comprise: chip 1 (concrete model: TL3844BDR-8), protect IC (ASP3001) resistance, electric capacity, diode, inductance, wherein, the positive pole of storage battery connects No. 5 pins of chip TL3844BDR-8, No. 6 pins, No. 7 pins, No. 8 pins, one end of the negative pole contact resistance R1 of storage battery, the other end of resistance R1 connects the other end of electric capacity C5, negative pole of output end ground connection, No. 1 pin of chip TL3844BDR-8, be connected with one end of inductance L 1 after No. 2 pins are connected, the other end of inductance L 1 connects the positive pole of output, No. 3 pins of chip TL3844BDR-8 connect the one end of electric capacity C1 and the electric capacity C2 be connected in parallel, the electric capacity C1 be connected in parallel is connected with one end of inductance L 1 with the other end of electric capacity C2, the anode of diode D1 connects output head anode, the negative electrode of diode D1 connects No. 4 pins of chip TL3844BDR-8,

The other end of the source electrode contact resistance R1 of effect pipe M1, the grid of field effect transistor M1 connects No. 1 pin of protect IC, the drain electrode of field effect transistor M1 connects the drain electrode of field effect transistor M2, and the source electrode of field effect transistor M2 connects No. 3 pins of the grid connection protect IC of output port 2, field effect transistor M2;

One end of No. 2 pin contact resistance R4 of protect IC; the other end of resistance R4 connects output port negative pole; be connected the lower port of the other end connection transformer T1 secondary side of electric capacity C5 with one end of electric capacity C5 after No. 4, No. 5 pins of protect IC are connected; be connected with the other end of resistor group R3 after No. 5 pins of protect IC are connected with No. 6 pins, one end of resistance R3 connects output head anode.

The circuit that the utility model provides is because add chip TL3844BDR-8, when storage battery input voltage is too high, chip TL3844BDR-8 reduces battery tension, then exported by output head anode, thus reduce use voltage, as voltage is too high, then after diode D1 conducting by too high Voltage Feedback to chip TL3844BDR-8, chip TL3844BDR-8 limits passing through of battery tension, play a protective role, so it has reduction battery tension, in addition, the utility model adds brand-new protect IC APS3001, this chip and its supporting circuit can provide corresponding protection when overtension, avoid automotive electronics because overtension damages, so it has reduction voltage, the advantage that fail safe is high.

Optionally, above-mentioned power supply also comprises: protective resistance (not shown in FIG.), and one end of this protective resistance connects the other end of inductance L 1, and the other end of protective resistance is connected with output head anode.This protective resistance can provide overvoltage protection to automotive electronics.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.

Claims (1)

1. a new automobile power supply adaptor, it is characterized in that, described new automobile power supply adaptor, comprise: chip TL3844BDR-8, protect IC ASP3001, resistance, electric capacity, diode, inductance and field effect transistor, wherein, the positive pole of storage battery connects No. 5 pins of chip TL3844BDR-8, No. 6 pins, No. 7 pins, No. 8 pins, one end of the negative pole contact resistance R1 of storage battery, the other end of resistance R1 connects the other end of electric capacity C5, negative pole of output end ground connection, No. 1 pin of chip TL3844BDR-8, be connected with one end of inductance L 1 after No. 2 pins are connected, the other end of inductance L 1 connects the positive pole of output, No. 3 pins of chip TL3844BDR-8 connect the one end of electric capacity C1 and the electric capacity C2 be connected in parallel, the electric capacity C1 be connected in parallel is connected with one end of inductance L 1 with the other end of electric capacity C2, the anode of diode D1 connects output head anode, the negative electrode of diode D1 connects No. 4 pins of chip TL3844BDR-8,

The other end of the source electrode contact resistance R1 of effect pipe M1, the grid of field effect transistor M1 connects No. 1 pin of protect IC, the drain electrode of field effect transistor M1 connects the drain electrode of field effect transistor M2, and the source electrode of field effect transistor M2 connects No. 3 pins of the grid connection protect IC of output port 2, field effect transistor M2;

One end of No. 2 pin contact resistance R4 of protect IC; the other end of resistance R4 connects output port negative pole; be connected the lower port of the other end connection transformer T1 secondary side of electric capacity C5 with one end of electric capacity C5 after No. 4, No. 5 pins of protect IC are connected; be connected with the other end of resistor group R3 after No. 5 pins of protect IC are connected with No. 6 pins, one end of resistance R3 connects output head anode.