LT3518 View Datasheet(PDF) - Analog Devices

Part Name

Description

MFG CO.

LT3518

Full-Featured LED Driver with 2.3A Switch Current

Analog Devices 

Block Diagram

LT3518

PVIN

RSENSE

CIN

LED ARRAY

CFILT

ISP

ISN

X10

CURRENT

SENSE

AMPLIFIER

SHDN

CTRL

1V

–

+

A1

+

1.01V

FB

VC

+

A2

–

TG

VISP

TGEN

VISP – 7V

MOSFET DRIVER

+

A3

+

ERROR

AMPLIFIER

–

A4

+

RSQ

PWM

COMPARATOR

SYNC

SS

RT

+

A5

1V

–

VIN

10µA 1V

SS

RAMP

GENERATOR

2.5MHz TO 250kHz

OSCILLATOR

+

+ A6

Q2

–

FREQ

ADJUST

VIN

PWM

2V

SW SW

MAIN SWITCH

DRIVER

Q1

MAIN

SWITCH

A8

GND

VIN

100µA

VREF

+

A7

–

3518 F01

Figure 1. Buck Mode LED Driver

3518ff

For more information www.linear.com/LT3518

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