IR21592S datasheet(7/25 Pages) IRF

7 / 25 page

IR21592/IR21593(S)

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State Diagram

PREHEAT Mode

1/2-BridgeOscillator On

CSPK+VIPH (Peak Current Control)

CPH Charging@I

PH+1µA

DIM+Open Circuit

Over-Current Disabled

UVLO Mode

1/2-Bridge Off

IQCC=200mA

CPH=0V

Oscillator Off

FAULT Mode

Fault Latch Set

1/2-Bridge Off

QCC=240µA

CPH=0V

VCC=15.6V

Oscillator Off

DIM Mode

Phase

CS=PhaseREF

DIM=CPH

Over-Current Enabled

CPH > 5.1V

(End of PREHEAT Mode)

VCC < 10.9V

(VCC Fault or Power Down)

VDC < 3.0V

(dc Bus/ac Line Fault or Power Down)

SD > 2.0V

(Lamp Fault or Lamp Removal)

SD > 2.0V

(Lamp Removal)

VCC < 10.9V

(Power Turned Off)

CS > V

CSTH (1.6V)

(Failure to Strike Lamp

or Hard Switching)

J > 165C

(Over-Temperature)

> 165C

(Over-Temperature)

CS > V

CSTH

(1.6V)

(Over-Current or Hard Switching)

> 165C

(Over-Temperature)

CS>VIPH(enable ignition detection)

then

CS<VIPH(ignition detected)

VCC > 12.5V (UV+)

and

VDC > 5.1V

(Bus OK)

and

SD < 1.7V

(Lamp OK)

and

< 165C

jmax

)

Power Turned On

IGNITION Mode

PH ramps to fMIN

CPH Charging@I

PH+1µA

DIM=Open Circuit

Over-Current Enabled

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