st1115j Silicon Touch Technology Inc., st1115j Datasheet - Page 5

• Manufacturer Part Number: st1115j
• Description: Flexible Speed Control Double Coil Brushless Motor Pre-driver
• Manufacturer: Silicon Touch Technology Inc.

R1
R2
R3
R4
Application Circuit
Typical Relationship of Fan Speed and PWM Duty Cycle Curve
*1
*1, *2, *3 : The Zener diode and capacitors will increase system stability, if required.
SP-ST1115J-A.003
Sensor
HALL
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
R
Fan Speed (in the percentage of the full speed)
VDD
100%
Figure 2. The Fan speed curve with PWM duty cycle.
RM
GND
VM
VDD
VZ
VF
H+
H-
Power
Version
DM
Figure 1.
PO1
PO2
SEL
PWM
RD
CF
FG
：
A.003
1μF
DH
PWM Duty Cycle
*3
Page：4
System Power
*2
ST1115J
FG
RD
PWM