LT3492IUFD(RevA) Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LT3492IUFD
(Rev.:RevA)

Triple Output LED Driver with 3000:1 PWM Dimming

Linear Technology 

LT3492

BLOCK DIAGRAM

+VSENSE–

ILED

RSENSE

LED ARRAY

C2

M1

D1

L1

VIN

C1

R3

R4

RC

CC

VIN

OVP1

VC1

ISP1

ISN1

TG1

PWM1

+ V1 –

R1 2k

EAMP

+

A1

–

A7

MOSFET

DRIVER

–

A6

+

1V

1V +

CTRL1

+ A8

Q3

–

CTRL

BUFFER

SLOPE

VC –

+

SR LATCH

A2

PWM

COMPARATOR

A3

RQ

S

R2

20k

PWM1

NPN

DRIVER

A4

A5

ISENSE

A10

SW1

Q1

GND

REPLICATED FOR EACH CHANNEL

VIN

C3

VIN

SHDN

VREF

INTERNAL

REGULATOR

AND UVLO

2V

REFERENCE

–

A9

+

R5

C4

R6

VIN

200μA

RAMP

GENERATOR

Q2

OSCILLATOR

FADJ

SHARED COMPONENTS

3492 BD

Figure 1. LT3492 Block Diagram Working in Boost Configuration

3492fa

8

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