TC649 Microchip, TC649 Datasheet - Page 2

• Manufacturer Part Number: TC649
• Description: PWM Fan Speed Controller
• Manufacturer: Microchip

TC649
Functional Block Diagram
DS21449C-page 2
GND
V
V
C
AS
IN
F
V
SHDN
+
–
+
–
–
+
Generator
Clock
TC649
70mV (typ.)
SHDN
PWM
–
+
3 x T
Start-up
Missing
Control
Detect
Timer
Pulse
Timer
Logic
PWM
10k
2002 Microchip Technology Inc.
FAULT
SENSE
V
V
DD
OUT