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NCP1336

Quasi-Resonant Current Mode Controller for High Power Universal Off-Line Supplies

ON Semiconductor 

NCP1336A/B

VDD

+

1st

−

Rpullup

FB

+

2nd

−

+

3rd

−

+

4th

−

VCO

HV

HV

TSD

VDD

HV

Startup

PNOK

Latch

VCC Management

Aux

VCC

+

VDD

ICt

Ct

+

Ct

Setpoint

−

ZCD

10 V

ESD

Laux

GND

Ct

Discharge

+

DRV

−

Vth Leakage

Blanking

3us Pulse

/4

1234

Decimal Counter

CLK rst

DRV

Demag

S

Q

Q

R

VDD

5us Timeout

+

−

BO Reset

Grand

Reset

Fault

Grand

Reset

Clamp

R

Q

Q

S

A:

Latched

Vdd

ItimerC

+

ItimerD

−

IpFlag

PWMReset

Grand

Reset

noise delay

S

Q

Q

R

VOVP

DRV

Gate

Timer

VCC

OVP

CS

OPP

Ipeak_min = 25% Limit

Leading

Edge

Blanking

100 ns

Ilimit

+ Vopp

+

PWM Reset

+

−

IpFlag

+

−

Ilimit

+

Soft−Start

−

Soft−Start End ? Then 1 Else 0

SS End

VDD

IOTP

SS End

VOTP

BO Reset

Noise Delay

VBO

+

−

OTP

T°

HV

BO

IBO

Figure 2. Internal Circuit Architecture

http://onsemi.com

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