NCP1212 datasheet(3/22 Pages) ONSEMI

Part #	NCP1212

Description	Current Mode PWM Controller for Both Forward and Flyback Converters

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Manufacturer	ONSEMI [ON Semiconductor]

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FB

+5 V

3 R

R

9 K

+

−

±

8

mA

+5 V

+

−

±

28

mA

+

−

0.5 V

Overload

Shutdown

300 ns

LEB

CS

+

−

1 V

OVLO

(25 V)

UVLO

(10 V)

Vref

Regulator

5 V

+

15 V

+

−

±

+5 V

45

mA

SW2

+

−

1.21 V

BOK

CT

OSC

Clock

IMAX

Max. Duty

Cycle

48% or 82%

S

D

Q

−

+

3.2 V

+

−

S

Q

Reset

Overload

Enable

D

Q

S

Q

R

F/F

Totem Pole Drive

SS/DMAX

VCC

DRV

GND

−

+

Current Limit

−

+

Brownout

Detection

−

+

−

+

−

+

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NCP1212 Datasheet(PDF) 3 Page - ON Semiconductor

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