NCP4353_15 Datasheet, PDF (14/17 Pages) ON Semiconductor – Secondary Side SMPS OFF Mode Controller

NCP4353, NCP4354
Figure 31. Typical Application States and Waveforms in OFF Mode with NCP1246 Primary Controller
D2
D1
C1
C2
R17
R16
D8
T2
R2
OPTO1
LED1 R3
R10 C4
FBC
C3
VCC
VMIN
ON/OFF
LED
GND
OFFDET
VSNS
NCP4354B
R4
R8
R5
R7
R6 R9
VOUT
Figure 32. Improved Load Detection Connection
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