ISL1902FAZ datasheet(4/25 Pages) INTERSIL

No. de pieza	ISL1902FAZ

Descripción Electrónicos	Full-Featured, Dimmable AC Mains LED Driver with PFC

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Fabricante Electrónico	INTERSIL [Intersil Corporation]

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Functional Block Diagram - ISL1902

OUT

PWM

COMPARATOR

PWM LATCH

+

-

S

R

Q

+

-

RAMP

AC

CrCM

DETECTOR

fMAX

Clamp

200mV

+

-

Master

Oscillator

LPOUT

REFIN

DUTY CYCLE TO

VOLTAGE

CONVERTER

LOW PASS FILTER

INRUSH

150us

One Shot

INRUSH CONTROL CIRCUIT

+

-

DELADJ

+

-

Triangle Wave

Generator

CLK

-

+

PWMOUT

VERR

600 mV

VREF

LOUT

LFB

LREF

DIMMING PWM

+

-

EA1

CrCM OSCILLATOR/PWM/ERROR

AMPLIFIERS

LINEAR AMPLIFIER

OC

Leading

Edge

Blanking

FB1

Quasi-ZVS

Delay

IOUT

REFINBUFF

+

-

EA2

FB2

PRIMARY OC

CLK

DELAYED AC-P

fMIN

Clamp

Peak

Detector

1/5

SS/5

1/5

Verr/5

PWM

VERR

AC Present 0-Xing

Blanking

_

+

Bias and

Reference

Generator

GND

VDD

UVLO

+

-

VREF

OTP Shutdown

150 - 170

°C

BIAS/UVLO/OTP

+

-

CS-

CS+

DIFFERENTIAL ISENSE

IOUT

No AC Counter

CLK

CARRY

-

+

PRELOAD

OFFREF

MINIMUM DIMMING

LEVEL CONTROL

0.25 V

SS LOW

FAULT LATCH

+

-

S

R

Q

SS

+

-

300 ms

Soft Start

ENABLE

+

- 1.50 V

BG

INHIBIT

VERR CLAMP

OVP

REF

Reference SS

AC-PRESENT

SS

REFINBUFF

Reference SS

Buffer

Q

350

μS

One Shot

Q

AC

DETECTION

SOFT-START/POR/OVP

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ISL1902FAZ Datasheet(PDF) 4 Page - Intersil Corporation

ISL1902FAZ Datasheet(HTML) 4 Page - Intersil Corporation

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