NCP1236 Datasheet, PDF (32/34 Pages) ON Semiconductor – Fixed Frequency Current Mode Controller for Flyback Converters

NCP1236
Controller Operation (Autorecovery Version: B Option)
V_CC > V_CC(on)
• t_autorec counting
• Brown−out
• TSD
Stopped
• Brown−out
• VCC reset
• Brown−out
• TSD
Skip
• High Latch
• V_CC > V_CC(ovp)
Soft−start
• Brown−out
• TSD
Soft−start ends
• Fault
• Brown−out
• TSD
Latch
• High Latch
• Low Latch
• V_CC > V_CC(ovp)
Skip in
Skip out
Running
• High Latch
• Low Latch
• V_CC > V_CC(ovp)
With Fault=
• t_fault expires
• V_CS > V_CS(stop)
• V_CC < V_CC(off)
Figure 54. Controller Operation State Diagram (Autorecovery Protection)
http://onsemi.com
32