©

1997

DATA SHEET

MOS INTEGRATED CIRCUIT

Document No. S12720EJ2V0DS00 (2nd edition)

Date Published September 1997 N

Printed in Japan

MONOLITHIC DUAL H BRIDGE DRIVER CIRCUIT

DESCRIPTION

The

µPD16808 is a monolithic dual H bridge driver circuit which employing N-channel power MOS FETs for its driver

stage. By using the power MOS FETs for the output stage, saturation voltage and power consumption are substantially

improved as compared with conventional driver circuits that use bipolar transistors.

Because the dual H bridge driver circuits at the output stage are independent of each other, this IC is ideal as the driver

circuit for a 1- to 2-phase excitation bipolar driving stepping motor for the head actuator of an FDD.

FEATURES

•

•

•

Four input modes independently controlling dual H bridge drivers (with 1- to 2-phase excitation selected)

•

Motor voltage 12 V/5 V compatible

•

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

C1L

C2H

1B

2B

DGND

SEL

2

20

18

17

16

15

14

13

12

11

19