3

RT8750

DS8750-01 April 2011

www.richtek.com

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

OUT3B

CH3 H-Bridge Output B Terminal.

2

OUT2B

CH2 H-Bridge Output B Terminal.

3

OUT2A

CH2 H-Bridge Output A Terminal.

4

OUT1B

CH1 H-Bridge Output B Terminal.

5

OUT1A

CH1 H-Bridge Output A Terminal.

6

RNF4

CH4 Current Detect Terminal for CC or FS Ground.

7

OUT4B

CH4 H-Bridge Output B Terminal.

8

OUT4A

CH4 H-Bridge Output A Terminal.

9

CS

Serial Data Latch Control.

10

SCLK

Serial Clock Input.

11

SDAT

Serial Data Input.

12

PI1

PI1 Driver Output.

13

VM

Power Supply for Motor Blocks.

14

IN3

Parallel Input Control.

15

IN2

Parallel Input Control.

16

IN1

Parallel Input Control.

17

VCC

IC Analog Input Power Pin.

18

PI2

PI2 Driver Output.

19

OUT5A

CH5 Push-pull Output A Terminal.

20

OUT3A

CH3 H-Bridge Output A Terminal.

21 (Exposed Pad) GND

Ground. The exposed pad must be soldered to a large PCB and connected to GND

for maximum thermal dissipation.

Function Block Diagram

1CH

FS/CV

2CH

FS/CV

3CH

FS/CV

5CH

FS/CV

Exclusive 1

4CH

FS/CC

Control Logic

4-bit DAC

VC12

VC3

VC4

Bias Low Voltage Detection

PI1

PI2

GND

Exclusive 2