TC646
DS21446D-page 2 2002-2012 Microchip Technology Inc.
Functional Block Diagram
FAULT
SHDN
SENSE
PWM
OTF
GND
70mV (typ.)
10kΩ
V
AS
V
SHDN
V
IN
C
F
V
DD
V
OUT
TC646
Control
Logic
+
–
V
OTF
+
–
+
–
+
–
+
–
3 x T
PWM
Timer
Start-up
Timer
Clock
Generator
Missing
Pulse
Detect.
