IRS2983STRPBF Datasheet, PDF (9/17 Pages) International Rectifier – LED FLYBACK CONTROL IC

State Diagram
IRS2983SPBF
Power Turned On
Watchdog
Timeout
Fault Mode
OUT = Low
COMP = Held Low
UVLO Mode
ICC = IQCCUV
HVREG = On
OUT = Low
COMP = Held Low
VZX > VOVTH
VCC > VCCUV+
Startup Mode
OUT = Switching
VCS < VCSTH
-VOVHYS
VCS > VCSTH
Current Limit
OUT = Low
VMULT > 1V
VZX > VOVTH
Regulating Mode
OUT = Switching
HVREG = Off
VCS < VCSTH
-VOVHYS
VCS > VCSTH
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December 10, 2013