IR2161 datasheet(6/20 Pages) IRF

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IR2161(S)&(PbF)

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NOTE: If the IR2161 die temperature exceeds 135o at any time the system will enter FAULT Mode. At a typical frequency of

40kHz, the die temperature is approximately 12oC above the ambient air temperature

UVLO Mode

QCC ≅

300

μA

Oscillator Off

SOFTSTART

Mode

RUN Mode

Fault Timing Mode

VCC > 12.1V (VCCUV+)

VCSD > 5.2V

(End of SOFTSTART Mode)

CSD discharged to 0V

Power Turned On

SHUTDOWN Mode

(Over-Temperature)

(Phase Cut Dimming)

- Bridge On

CSD charged from Isource

Initial frequency 130kHz

Frequency ramps down to

f(min)

-Bridge Off

CSD switched to Comp function

CSD varies between

VCSD (min) = 0 for f(min)

to VCSD(max) = 5.5V for f(max)

Fault Detected (Vpk at VCS > 0.56V (V

))

CSD switched to Shutdown Circuit

Frequency defaults to f(min)

- Bridge On

VCS >0.56V(VCSOL)=Overload:CSD slow charge

VCS > 1.2V (VCSSC) = Short Circuit : CSD

fast charge

Fault Removed

CSD switched to

run mode

(Vpk at VCS < 0.5V)

Fault Confirmed

(VCSD > 12V)

CSD is slowly discharged

Auto-Restart Timeout

(VCSD < 2.4V) (VCSDRS)

CSD switched to run mode

Oscillator On

CSD initialized to 5V (VCSDOL)

CSD is slowly

discharged to 2.4V

(VCSDRS)

Delay

STANDBY Mode

QCC ≅

300

μA

Oscillator Off

-Bridge Off

VCC < 5.5V (VCCUVL-)

(Power Turned Off)

VCC > 12.1V(VCCUV+)

Oscillator On

FAULT Mode

Oscillator Off

-Bridge Off

VCC < 5.5V (VCCUVL-)

(Power Turned Off)

Fault Detected

(Vpk at VCS > 0.56V)(V

)

CSD = 0V

(Over-Temperature)

Voltage compensation active

(Phase Cut Dimming)

(Tjmax)

-Bridge Off

(VCSLATCH)

Fault Detected

(Vpk at VCS > 9V)

)

(VCSDSD)

<135 C

CSOL

VCC < 10.5V (V

)

CCUV-

VCC < 10.5V (V

)

CCUV-

CSOL

All values are typical

IR2161 Datasheet(PDF) 6 Page - International Rectifier

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