©

1997

DATA SHEET

MOS INTEGRATED CIRCUIT

Document No. S11452EJ2V0DS00 (2nd edition)

Date Published July 1997 N

Printed in Japan

MONOLITHIC DUAL H BRIDGE DRIVER CIRCUIT

DESCRIPTION

The

µPD16803 is a monolithic dual H bridge driver circuit which uses N-channel power MOS FETs in its driver stage.

By employing the power MOS FETs for the output stage, this driver circuit has a substantially improved saturation voltage

and power consumption as compared with conventional driver circuits that use bipolar transistors.

In addition, the drive current can be adjusted by an external resistor in a power-saving mode.

The

µPD16803 is therefore ideal as the driver circuit of the 2-phase excitation, bipolar-driven stepping motor for the head

actuator of an FDD.

FEATURES

•

Low ON resistance (sum of ON resistors of top and bottom transistors)

•

•

Stop mode function that turns OFF all output transistors

•

Compact surface mount package: 20-pin plastic SOP (300 mil)

PIN CONFIGURATION (Top View)

1

3

4

5

6

7

8

9

10

C1H

C2L

1A

2A

PGND

INC

C1L

C2H

1B

2B

PGND

DGND

PS

2

20

18

17

16

15

14

13

12

11

19