TC647B Microchip Technology Inc., TC647B Datasheet - Page 2

• Manufacturer Part Number: TC647B
• Description: Pwm Fan Speed Controllers With Minimum Fan Speed, Fan Restart And Fansense Technology For Fault Detection
• Manufacturer: Microchip Technology Inc.

TC642B/TC647B
Functional Block Diagram
DS21756B-page 2
GND
V
V
MIN
C
IN
F
V
SHDN
Generator
Clock
TC642B/TC647B
V
OTF
Note
3xT
Start-up
Missing
Control
Detect
Timer
Timer
Pulse
Logic
PWM
70 mV
10 k
(typ)
V
V
FAULT
SENSE
DD
OUT
Note: The V
is for the TC642B device only.
OTF
comparator
2003 Microchip Technology Inc.