ICE2QS03(2009) 데이터 시트보기 (PDF) - Infineon Technologies

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ICE2QS03
(Rev.:2009)

Quasi-Resonant PWM Controller

Infineon Technologies 

Quasi-Resonant PWM Controller

ICE2QS03

Electrical Characteristics

4.3.3

PWM Section

Parameter

Feedback Pull-Up Resistor

PWM-OP Gain

Offset for Voltage Ramp

Maximum on time in normal

operation

Symbol

RFB

GPWM

VPWM

tOnMax

Limit Values

Unit

min. typ.

max.

14

23

33

kΩ

3.18 3.3

-

-

0.63 0.7

-

V

22

30

41

µs

Test Condition

4.3.4

Current Sense

Parameter

Symbol

Peak current limitation in normal VCSth

operation

Leading Edge Blanking time

Peak Current Limitation in

Active Burst Mode

tLEB

VCSB

Limit Values

Unit

min. typ.

max.

0.97 1.03 1.09 V

200

330

460

ns

0.29 0.34 0.39 V

Test Condition

4.3.5

Soft Start

Parameter

Symbol

Limit Values

Unit Test Condition

min. typ.

max.

Soft-Start time

tSS

8.5

12

-

ms

soft-start time step

tSS_S1)

-

3

-

ms

Internal regulation voltage at

VSS11)

-

1.76 -

V

first step

Internal regulation voltage step VSS_S1)

-

0.56 -

V

at soft start

1) The parameter is not subjected to production test - verified by design/characterization

4.3.6

Foldback Point Correction

Parameter

Symbol

ZC current first step threshold

ZC current last step threshold

CS threshold minimum

IZC_FS

IZC_LS

VCSMF

Limit Values

Unit

min. typ.

max.

0.35 0.5

0.621 mA

1.8

2

2.2

mA

-

0.66 -

V

Test Condition

Izc=2.2mA, VFB=3.8V

Version 2.0

14

December 4, 2009

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