NCL30486 datasheet(2/29 Pages) ONSEMI

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NCL30486

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Aux

NCL30386

ADIM

PWM signal

Figure 1. Typical Application Schematic for NCL30486

PIN FUNCTION DESCRIPTION NCL30486

Pin N5

Pin Name

Function

Pin Description

ADIM

Analog dimming

This pin is used for analog control of the output current. Applying a voltage varying

between VDIM(EN) and VDIM100 will dim the output current from 0% to 100%.

COMP

OTA output for CV loop

This pin receives a compensation network to stabilize the constant voltage loop

ZCD

Zero crossing Detection

Vaux sensing

This pin connects to the auxiliary winding and is used to detect the core reset event.

This pin also senses the auxiliary winding voltage for accurate output voltage control

Current sense

This pin monitors the primary peak current.

GND

−

The controller ground

DRV

Driver output

The driver’s output to an external MOSFET

VCC

Supplies the controller

This pin is connected to an external auxiliary voltage.

PDIM

PWM dimming

This pin is used for PWM dimming control. An optocoupler can be connected directly

to the pin if the PWM control signal is from the secondary side

creepage

High Voltage sensing

This pin connects after the diode bridge to provide the startup current and internal

high voltage sensing function.

NCL30486 Datasheet(PDF) 2 Page - ON Semiconductor

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