CN202145633U

CN202145633U - Motor drive chip and motor drive system

Info

Publication number: CN202145633U
Application number: CN201120269160U
Authority: CN
Inventors: 赖泽联
Original assignee: SHENZHEN HOTCHIP TECHNOLOGY Co Ltd
Current assignee: Jiangsu Weiming Huaxin Semiconductor Co., Ltd
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-02-15
Anticipated expiration: 2021-07-27

Abstract

The embodiment of the utility model discloses a motor drive chip and a motor drive system. An input interface circuit, a drive circuit and a logic control circuit are integrated in the chip by adopting the CMOS (Complementary Metal-Oxide-Semiconductor Transistor) technology, wherein the drive circuit comprises two outputs, and the logic control circuit is connected with the input interface circuit and the drive circuit. Therefore, drive-relevant circuits are integrated in one chip, the demand on peripheral devices is reduced, the manufacture efficiency is greatly increased, and the cost for labor and manufacture can be saved; with the adoption of an overheat protective circuit, an overcurrent protective circuit and a countercurrent protective circuit, a complete protection mechanism can be supplied for the whole chip and the whole system, the safety of the devices is ensured, and the performance of the devices is good in consistency.

Description

A kind of motor driven chip and system

Technical field

The utility model relates to inductive load and drives the field, relates in particular to a kind of motor driven chip and system.

Background technology

Drive the field at inductive loads such as motors, prior art generally adopts discrete device (like triode, resistance and electric capacity etc.) to build drive circuit board, accomplishes driving through the detection and the stronger drive current of decoding output of input signal to inductive loads such as motors.But above-mentioned drive circuit board needs peripheral components more, causes manufacturing cost high; Do not have corresponding safeguard measure, be prone to cause the circuit board damage; Because adopt triode as efferent duct usually, saturation voltage drop is fixed, power loss is bigger; In addition, quiescent current is bigger, causes stand-by time short.

The utility model content

The utility model embodiment technical problem to be solved is, a kind of motor driven chip and motor-driven system are provided, to reduce manufacturing cost, to protect chip and guarantee the device performance consistency.

In order to solve the problems of the technologies described above; The utility model embodiment has proposed a kind of motor driven chip; Adopt CMOS technology to be integrated with in this chip: input interface circuit, to have the drive circuit of two outputs and the logic control circuit that links to each other with said input interface circuit and drive circuit.

Correspondingly; The utility model embodiment also provides a kind of motor-driven system; Comprise motor and motor driven chip; Adopt CMOS technology to be integrated with in the said chip: input interface circuit, have the drive circuit of two outputs, and the logic control circuit that links to each other with said input interface circuit and drive circuit, two outputs of said drive circuit link to each other with said motor.

Further, adopt CMOS technology also to be integrated with the thermal-shutdown circuit that links to each other with said logic control circuit in this chip.

Further, adopt CMOS technology also to be integrated with the current foldback circuit that links to each other with said logic control circuit in this chip.

Further, adopt CMOS technology also to be integrated with the reverse-current protection circuit that links to each other with two outputs of said drive circuit in this chip.

The utility model embodiment is through providing a kind of motor driven chip and system; Adopt CMOS technology to be integrated with in this chip: input interface circuit, have the drive circuit of two outputs, and the logic control circuit that links to each other with said input interface circuit and drive circuit, thereby; Integrated driving interlock circuit in chip piece; The peripheral components demand reduces, and makes efficient and improves greatly, and saved manual work and manufacturing cost; Adopt excess temperature, overcurrent, reverse-current protection circuit also can perfect protection mechanism be provided, guaranteed device safety, the device performance high conformity for entire chip and system.

Description of drawings

Fig. 1 is the structure chart of the motor-driven system of the utility model first embodiment.

Fig. 2 is the structure chart of the motor-driven system of the utility model second embodiment.

Fig. 3 is the structure chart of the motor driven chip of the utility model embodiment.

Embodiment

Below in conjunction with accompanying drawing, embodiment is elaborated to the utility model.

Fig. 1 is the structure chart of the motor-driven system of the utility model first embodiment, and it mainly comprises motor M, and the motor driven chip; This chip structure can be as shown in Figure 3, wherein adopts CMOS technology to be integrated with: input interface circuit 1 has the drive circuit 2 of two outputs; And the logic control circuit 3 that links to each other with input interface circuit 1 and drive circuit 2; 2 two output of drive circuit OA, OB link to each other with motor M, also are connected with thermal-shutdown circuit 4 and current foldback circuit 5 with logic control circuit 3 respectively, the reverse-current protection circuit 6 that links to each other with 2 two output of drive circuit OA, OB; Wherein, thermal-shutdown circuit 4 also is connected with biasing circuit 7.

This motor driven chip adopts advanced CMOS technology, has realized the fully integrated of peripheral components, wherein:

Input interface circuit 1 comprises IA, two terminals of IB and compatible TTL and CMOS level, has good antijamming capability; Logic through detecting input signal is also decoded, thereby produces drive signal;

Drive circuit 2 has two output OA, OB, and it is the positive and negative motion of CD-ROM drive motor M directly, has extremely strong driving force and extremely low saturation voltage drop, can produce 300 milliamperes-3 electric currents about peace under the driving of control signal;

Reverse-current protection circuit 6 adopts active clamp technology, and this technology can be discharged into ground with reverse current, thereby protects internal circuit effectively, reduces loss of power electric current;

When chip operation was overheated, thermal-shutdown circuit 4 can be triggered, and closeall power tube, had avoided big electric current output;

When two output OA, OB short circuit or output over the ground/during power supply short circuit, current foldback circuit 5 carries out clamp with the detection power tube current and to power tube current, prevents the generation of EOS.

Fig. 2 is the structure chart of the motor-driven system of the utility model second embodiment, and the difference of itself and first embodiment is that two output OA of motor driven chip, OB have driven a motor M respectively.

The above is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection range of the utility model.

Claims

1. a motor driven chip is characterized in that, adopts CMOS technology to be integrated with in this chip: input interface circuit, have the drive circuit of two outputs and the logic control circuit that links to each other with said input interface circuit and drive circuit.

2. motor driven chip as claimed in claim 1 is characterized in that, adopts CMOS technology also to be integrated with the thermal-shutdown circuit that links to each other with said logic control circuit in this chip.

3. motor driven chip as claimed in claim 1 is characterized in that, adopts CMOS technology also to be integrated with the current foldback circuit that links to each other with said logic control circuit in this chip.

4. motor driven chip as claimed in claim 1 is characterized in that, adopts CMOS technology also to be integrated with the reverse-current protection circuit that links to each other with two outputs of said drive circuit in this chip.

5. motor-driven system; It is characterized in that; Comprise motor and motor driven chip; Adopt CMOS technology to be integrated with in the said chip: input interface circuit, have the drive circuit of two outputs, and the logic control circuit that links to each other with said input interface circuit and drive circuit, two outputs of said drive circuit link to each other with said motor.

6. motor-driven system as claimed in claim 5 is characterized in that, adopts CMOS technology also to be integrated with the thermal-shutdown circuit that links to each other with said logic control circuit in the said chip.

7. motor-driven system as claimed in claim 5 is characterized in that, adopts CMOS technology also to be integrated with the current foldback circuit that links to each other with said logic control circuit in the said chip.

8. motor-driven system as claimed in claim 5 is characterized in that, adopts CMOS technology also to be integrated with the reverse-current protection circuit that links to each other with two outputs of said drive circuit in the said chip.