點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

ST1155B

ST1155B_SSOP16_A05.doc

Version: A.05

-1-

ST1155B

Low-saturation, Low-voltage

Bi-directional Motor Driver

General Specifications

The device is a two-channel low-saturation bi-directional motor driver IC. The design is

optimal for stepper-motor applications, such as cameras, printers, FDDs, or other portable

devices.

Features and Benefits

Low saturation voltage ( Upper transistor + low transistor residual voltage; 0.3V typ. at

400mA; 0.6V typ. at 750mA)

Parallel connection ( two-channel driver: Upper transistor + low transistor residual ; 0.4V

typ. at 800mA )

Separate control logic power supply and motor driver power supply

High output sinking and driving capability

Thin, highly reliable package (SSOP-16)

Pin Assignment

1

2

3

4

5

6

7

16

15

14

13

12

11

10

VDD

ENA1

O1

VS1

VS1

O2

IN1

GND

ENA2

O3

VS2

VS2

O4

IN2

8

9

GND

VREF