ncp1338 ON Semiconductor, ncp1338 Datasheet - Page 8

• Manufacturer Part Number: ncp1338
• Description: Pwm Current-mode Controller For Free Running Quasi-resonant Operation
• Manufacturer: ON Semiconductor

Setpoint
TIMER
FAULT
VCC
V
VCC
CS
V
80 ms
CSLimit
V
CS
CSstby
Fault
CC
MIN
ON
SS
At startup, a 4.0 ms Soft-Skip is activated.
If the current Setpoint is above the fault
level, FAULT flag is raised.
When FAULT is activated,
the 80 ms timer starts.
Figure 3. Startup Sequence
http://onsemi.com
Timing Diagrams
NCP1338
8
When the timer ends, if FAULT is not activated
anymore, the controller works normally.