ST1115D SITI [Silicon Touch Technology Inc.], ST1115D Datasheet - Page 8

• Manufacturer Part Number: ST1115D
• Description: PWM Speed Control Double Coil Brushless DC Motor Driver
• Manufacturer: SITI [Silicon Touch Technology Inc.]

2.
(1) Figure 3 shows the temperature-control fan switch circuit, where the fan either stops or
Thermistor
Temperature-control Fan Switch ―Refer to Figure 3.
rotates at the full speed, depending on some temperature threshold. Figure 4 indicates
the graph of the fan speed as a function of the temperature. The temperature threshold
is T with the hysteresis T2-T1.
Figure 3. Temperature-control Fan Switch (where ST1115C is shown for illustration).
R1
SP-ST1115CD-A.005
VSS
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
R2
Q1
R5
R4
VSS
R3
Q2
Hall
IC
VSS
C1
C2
VSS
VSS
Figure 4.
Version
Hin
VT
CF
ST1115C
GND
：
VDD
VSS
A.005
RD
O1
O2
R6
Analog Power
D1
Z1
ST1115C/ST1115D
VSS
Page
Digital Power
VSS
Z2
：
R7
7
RD