IR2157 データシートの表示（PDF） - International Rectifier

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IR2157

FULLY INTEGRATED BALLAST CONTROL IC

International Rectifier 

IR2157

ADVANCED INFORMATION

Power Turned On

SD > 2.0V

(Lamp Removal)

or

VCC < 9.5V

(Power Turned Off)

UVLO Mode

1/2-Bridge Off

IQCC ≅ 1 5 0 µA

CPH = 0V

Oscillator Off

VCC > 11.4V (UV+)

and

VDC > 5.1V(Bus OK)

and

SD < 1.7V (Lamp OK)

and

TJ < 175C (Tjmax)

FAULT Mode

Fault Latch Set

1/2-Bridge Off

IQCC ≅ 1 5 0 µA

CPH = 0V

VCC = 15.6V

Oscillator Off

TJ > 175C

(Over-Temperature)

PREHEAT Mode

1/2-Bridge @ f PH

C P H Charging @ I PH = 1 µA

RPH = 0V

RUN = Open Circuit

CS Disabled

CS > 1.0V

(Failure to Strike Lamp

or Hard Switching)

or

TJ > 175C

(Over-Temperature)

CPH > 4.0V

(End of PREHEAT Mode)

IGNITION RAMP Mode

fPH ramps to f MIN

C P H Charging @ I PH = 1 µA

RPH = Open Circuit

RUN = Open Circuit

CS 1V Threshold Enabled

CS > 1.0V

(Over-Current or Hard Switching)

or

CS < 0.2V

(No-Load or Below Resonance)

or

TJ > 175C

(Over-Temperature)

CPH > 5.1V

(End of IGNITION RAMP)

RUN Mode

fMIN Ramps to f RUN

CPH Charges to 7.6V Clamp

RPH = Open Circuit

RUN = 0V

CS 0.2V Threshold Enabled

VCC < 9.5V

(VCC Fault or Power Down)

or

VDC < 3.0V

(dc Bus/ac Line Fault or Powe

or

SD > 2.0V

(Lamp Fault or Lamp Remova

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