ICE3AS02G datasheet(6/23 Pages) INFINEON

Part #	ICE3AS02G

Description	Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell

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Manufacturer	INFINEON [Infineon Technologies AG]

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6 / 23 page

Version 1.1

6

21 May 2004

F3

ICE3AS02 / ICE3AS02G / ICE3BS02 / ICE3BS02G

Pin Configuration and Functionality

1.3

Pin Functionality

SoftS (Soft Start & Auto Restart Control)

The SoftS pin combines the functions of Soft Start

during Start Up and error detection for Auto Restart

Mode. These functions are implemented and can be

adjusted by means of an external capacitor at SoftS to

ground. This capacitor also provides an adjustable

blanking window for high load jumps, before the IC

enters into Auto Restart Mode.

FB (Feedback)

The information about the regulation is provided by the

FB Pin to the internal Protection Unit and to the internal

PWM-Comparator to control the duty cycle. The FB-

Signal controls in case of light load the Active Burst

Mode of the controller.

CS (Current Sense)

The Current Sense pin senses the voltage developed

on the series resistor inserted in the source of the

external PowerMOS. If CS reaches the internal

threshold of the Current Limit Comparator, the Driver

output is immediately switched off. Furthermore the

current

information

is

provided

for

the

PWM-

Comparator to realize the Current Mode.

Gate

The Gate pin is the output of the internal driver stage

connected to the Gate of an external PowerMOS.

HV (High Voltage)

The HV pin is connected to the rectified DC input

voltage. It is the input for the integrated 500V Startup

Cell.

VCC (Power supply)

The VCC pin is the positive supply of the IC. The

operating range is between 8.5V and 21V.

GND (Ground)

The GND pin is the ground of the controller.

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ICE3AS02G Datasheet(PDF) 6 Page - Infineon Technologies AG

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