IR1155SPBF データシートの表示（PDF） - International Rectifier

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IR1155SPBF

PROGRAMMABLE FREQUENCY, ONE CYCLE CONTROL PFC IC

International Rectifier 

IR1155S

Block Diagram

OVP

VFB

COMP

VBIAS

VOVP

Overvoltage

Comparator

OVP

VBIAS

VSLEEP

Enable

Comparator

(SLEEP MODE)

SLEEP

ISNS

V BIAS

Peak

Overcurrent

Comparator

V BIAS

OCP

VISNS(PK)

-

+

FREQ

RESET

BLANK

V BIAS

VREF

Vm

V BIAS

RAMP

OVP

V BIAS

GATE OFF

VSUMMER

VCOMP

PWM OFF

0

RESET

OSC

V BIAS

OSCILLATOR

SET

Blanking

Pulse at Ton

MAX

DUTY CYCLE

LIMIT

MAX

DUTY

GATE OFF

SQ

R1

V BIAS

VCC

GATE

VCOMP Discharge

V BIAS

STNDBY

VOLP

Open Loop

Comparator

(Stand-By Mode)

UVLO/SLEEP

250mV

VCOMP Discharge

Threshold

Comparator

S1 Q

RQ

VCC OK

UVLO

VOVP = 106% VREF

VREF

80% VREF

VOUV = 50% VREF

VOLP = 19%VREF

VSLEEP

250mV

Internal Rail

&

Precision

Reference

SLEEP

(POWER

OFF)

VCC

COM

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© 2011 International Rectifier

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