M54670P データシートの表示（PDF） - Renesas Electronics

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M54670P

2-Phase Stepper Motor Driver

Renesas Electronics 

M54670P

Precautions for use

(1) When the whole output current changes by a large margin (for example, when thermal shutdown operation causes

intermittent flow of output current), the supply voltage may undergo a change. Therefore, selection and wiring of

power supply should be conducted cautiously to avoid such a situation that the supply voltage exceeds the absolute

maximum ratings.

(2) When the supply voltage changes by a large margin, the operation of this IC may become unstable. In this case, the

change of supply voltage can be controlled by connecting a capacitor between Vcc pin and GND pin.

(3) Thermal shutdown function

The state of thermal shutdown operation may differ according to the way of wiring within a board. Therefore,

sufficient board evaluation should be conducted before use. When the board is changed, operation on the replacing

board should be evaluated.

The circuit board on which this IC is mounted is designed to realize low impedance between power supply and

output pin.

Therefore, it is desirable to take a safe measure such as fixing a fuse to avoid such a situation that the board is

damaged by a fire when output pin is internally short-circuited by excessively applied surge voltage by accident.

Rev.1.0, Sep.19.2003, page 9 of 10

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