NCP1234 ONSEMI [ON Semiconductor], NCP1234 Datasheet - Page 29

• Manufacturer Part Number: NCP1234
• Description: Fixed Frequency Current Mode Controller for Flyback Converters
• Manufacturer: ONSEMI [ON Semiconductor]

NCP1234
STATE DIAGRAMS
HV Start−up Current Source
V
> V
CC
CC(inhibit)
I
start1
No TSD
I
start2
V
< V
CC
CC(inhibit)
TSD
TSD
Stop
TSD
V
< V
CC
CC(min)
V
> V
CC
CC(on)
TSD
Off
Figure 48. HV Start−up Current Source State Diagram
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