NCP1351 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

NCP1351

Variable Off Time PWM Controller

ON Semiconductor 

NCP1351

INTERNAL CIRCUIT ARCHITECTURE

VDD

FB

VDD

ICt

Ct

+

+−

VFault

45k

VDD

ICS−dif*

VOFFset

+

1 ms

Pulse

ICS−dif*

CS

ICS−min*

S

Q

Q

R

20 ms Filter

+

VTIMER

VDD

ITIMER

UVLO Reset

Fault = Low

TIMER

IP Flag

20 ms Filter

S

Q

Q

R

4V Reset

UVLO Reset

+

VLATCH

VDD

VCC

Mngt

VCCSTOP

1 = OK

0 = not OK

VZENER

Clamp

LATCH

VCC

DRV

GND

−

+

+

Vth

*(ICS−diff = ICS−max −ICS−min)

Figure 2. A Version (Latched Short−Circuit Protection)

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