TC642 Microchip, TC642 Datasheet - Page 2

• Manufacturer Part Number: TC642
• Description: PWM Fan Speed Controller
• Manufacturer: Microchip

TC642
Functional Block Diagram
DS21444C-page 2
GND
V
MIN
V
C
IN
F
V
SHDN
TC642
+
+
–
–
Generator
Clock
+
–
V
OTF
70mV (typ.)
+
–
SHDN
–
+
3 x T PWM
Start-up
Missing
Control
Detect
Pulse
Timer
Timer
Logic
OTF
10k
2002 Microchip Technology Inc.
SENSE
FAULT
V
V
DD
OUT