ICE1QS01 Datasheet, PDF(6/21 Page) Infineon Technologies AG – Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction (PFC)

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ICE1QS01 Datasheet, PDF (6/21 Pages) Infineon Technologies AG – Controller for Switch Mode Power Supplies Supporting Low Power Standby and Power Factor Correction (PFC)

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ICE1QS01

Functional Description

Start up

An internal start up diode is connected between pin PCS and pin VCC. Start up current is provided

via this diode if VPCS is higher than VCC + VBE (VBE = Base-Emitter-Voltage).

During start up the internal reference of the IC is shut off and current consumption is about 60 ÂµA.

There is only the start up circuitry working which determines the VCCon threshold. Gate driver OUT

is switched to low. An active shut down circuitry ensures that OUT is held below the MOS gate

threshold when the IC is in start up mode.

Block Diagram: Start Up

VCC

UVLO

PCS

ICE1QS01

OUT

Version 1.4

27 Apr 2004

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