NCL30080_15 datasheet(3/25 Pages) ONSEMI

Part #	NCL30080

Description	Quasi-Resonant Primary Side Current-Mode Controller

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Manufacturer	ONSEMI [ON Semiconductor]

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NCL30080

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3

Figure 2. Internal Circuit Architecture

ZCD

Zero Crossing Detection

CS

Winding and

Output diode

Short Circuit

Protection

Max. Peak

Current

Limit

Ipkmax

WOD_SCP

Qdrv

VCC Management

VCC

DRV

Internal

Thermal

Shutdown

Management

Clamp

Circuit

VIN

Brown−Out

BO_NOK

CS_reset

STOP

UVLO

OFF

Latch

STOP

WOD_SCP

Ipkmax

BO_NOK

GND

STOP

Qdrv

Aux. Winding

Aux_SCP

VCC_max

Line

Ipkmax

CS Short

Protection

CS_shorted

Short Circuit Protection

Protection

VCC Over Voltage

Fault

Feedforward

Leading

Edge

Blanking

Valley Selection

Constant−Current

Control

S

R

Q

VVIN

VREF

VVLY

VVIN

VDD

VREF

VCC

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