點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

ST1117A / ST1117B /ST1117C

SP-ST1117ABC-A.007

Version

：A.007

Page

：3

Truth Table

HP

HN

PWM

O1

O2

H

L

H

H

L

L

H

H

L

H

-

-

L

OFF

OFF

Block Diagram & Application Circuit

HALL

Sensor

Logic

Block

+

-

POWER

FG / RD

Lock Detector

Frequency Generator /

Rotating Detector

DRIVERS

VDD

HN

GND

FGR

O1

O2

HP

PWM

*3

*1

*2

AMP

Power

*1, *2, *3 : The Zener diode and capacitors will increase system stability, if required.