NCP1351 ON Semiconductor, NCP1351 Datasheet - Page 18

• Manufacturer Part Number: NCP1351
• Description: Variable Off Time Controller Featuring Short-circuit Protection
• Manufacturer: ON Semiconductor

Figure 22. The C Version Latches if the Power Excursion Exceeds 50% of the Maximum Power Too Long
Figure 23. The D Version Enters Auto-Recovery Burst Mode if the Power Excursion Exceeds 50% of the
V
V
V
V
I
I
DRV
DRV
I
I
DRV
DRV
FB
FB
FB
FB
timer
timer
timer
timer
P
P
P
P
V
V
V
V
out
out
out
out
cc
cc
cc
cc
startup
startup
startup
startup
ICC1
ICC1
ICC1
ICC1
Maximum Power (DCM Full Load Operation)
overload
overload
overload
overload
C version, latched dual OCP level
D version, auto-recovery dual OCP level
(DCM Full Load Operation)
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P
P
P
P
out
out
out
out
>50%
>50%
>50%
>50%
NCP1351
18
Latched
Latched
state
state
Pulldown
Pulldown
SCR action
SCR action
Pulses
Pulses
stopped
stopped
P
P
P
P
overload
overload
overload
overload
out
out
out
out
>50%
>50%
>50%
>50%
User
User
reset
reset
ICC4
ICC4
ICC < 20 μA
ICC < 20 μA
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
V
V
V
V
V
V
V
V
100% P
100% P
50% P
50% P
51 μA
100% P
100% P
50% P
50% P
51 μA
zener
zener
zener
zener
timer
timer
timer
timer
ON
ON
μA
ON
ON
μA
stop
stop
stop
stop
out
out
out
out
out
out
out
out