ICE2QR4765 Ver la hoja de datos (PDF) - Infineon Technologies

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ICE2QR4765

Off-Line SMPS Quasi-Resonant PWM Controller with integrated 650V Startup Cell/Depletion CoolMOS® In DIP-8

Infineon Technologies 

CoolSET® - Q1

ICE2QR4765

Electrical Characteristics

4.3.7

Digital Zero Crossing

Parameter

Symbol

Zero crossing threshold voltage

Ringing suppression threshold

Minimum ringing suppression

time

VZCCT

VZCRS

tZCRS1

Maximum ringing suppression tZCRS2

time

Threshold to set Up/Down

Counter to one

VFBR1

Threshold for downward

counting at low line

VFBZHL

Threshold for upward counting VFBZLL

at low line

Threshold for downward

counting at hig line

VFBZHH

Threshold for upward counting VFBZLH

at highline

ZC current for IC switch

threshold to high line

IZCSH

ZC current for IC switch

threshold to low line

IZCSL

Counter time1)

tCOUNT

Limit Values

Unit

min. typ.

max.

50

100

170

mV

-

0.7

-

V

1.62 2.5

4.5

µs

-

25

-

µs

3.9

V

3.2

V

2.5

V

2.9

V

2.3

V

-

1.3

-

mA

-

0.8

-

mA

48

ms

Test Condition

VZC > VZCRS

VZC < VZCRS

Maximum restart time in normal tOffMax

operation

30

42

57.5 µs

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

4.3.8

Active Burst Mode

Parameter

Symbol

Feedback voltage for entering VFBEB

Active Burst Mode

Minimum Up/down value for

entering Active Burst Mode

NZC_ABM

Blanking time for entering Active tBEB

Burst Mode

Feedback voltage for leaving

Active Burst Mode

VFBLB

Feedback voltage for burst-on

Feedback voltage for burst-off

VFBBOn

VFBBOff

Limit Values

Unit

min. typ.

max.

-

1.25 -

V

7

-

24

-

ms

-

4.5

-

V

-

3.6

-

V

3.0

V

Test Condition

Version 2.1

15

February 5, 2010

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