M54679SP

Rev.1.0, Sep.17.2003, page 2 of 11

Pin Configuration (Top View)

32 Shrink-DIP (32P4B)

Ph1A

Ph1B

Vref

Vcc

S1

Rs1

Out1B

Out1A

P.GND

GND

Vm1

I1(1)

I0(1)

Stby

Regout

Ph2A

Ph2B

GND

I1(2)

I0(2)

Fref

Vm2

S2

Rs2

Out2A

Out2B

N.C

NC

1

2

3

4

5

6

7

10

11

12

13

14

15

16

8

9

20

21

22

23

26

27

28

29

30

31

32

17

18

19

24

25

Pin Functions

Symbol

Terminal

Function

Vm1, Vm2

Motor supply voltage

Power supply for motor driver.

Out1A, Out1B, Out2A,

Out2B,

Output terminals

Motor drive output terminals.

Rs1, Rs2

Current sensor

Output current sensing resistor (Rs) connection terminals.

Vcc

Power supply

Control circuit power supply.

Ph1A, Ph1B, Ph2A,

Ph2B

Phase input

Output current direction switch terminals.

I0(1), I1(1), I0(2), I1(2),

Output current change

Output current change (100%, 70%, 31%, 0%) terminals.

Stby

Standby input

Standby input (L: standby, H or Open: motor function) terminal.

S1, S2

Sense inputs

Input voltage terminal of comparators.

Vref

Vref input

Reference voltage due to setting output current.

Regout

Output of voltage stabilizer

Output of voltage stabilizer (Vout = 3.5 V).

Fref

A capacitor for oscillator

A capacitor due to PWM carrier frequency.

P.GND

Power GND

The GND terminal of bottom side flywheel diodes.