LT3599 データシートの表示（PDF） - Linear Technology

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LT3599

4-String 120mA LED Driver with ±1.5% Current Matching

Linear Technology 

LT3599

Block Diagram

SHDN/UVLO

VIN

–

1.4V +

RT

OSCILLATOR

SYNC

1.227 VREF

SLOPE

SOFT-START LOGIC

Σ

+

S

Q

VC

– A2

R

SS

PWM

VREF

PWM DIMMING

LOGIC

CTRL –

1V +

TSET –

A1

VPTAT +

ISET

OVP gm

VREF

0.7V

LED gm

LED DRIVE

CIRCUITRY

GND

SW

Q1

A3

VOUT

PMOS

VO_SW

R2

FB

R1

OPENLED, SHORTLED

DETECTION

SHORTLED

OPENLED

LED1

LED2

LED3

LED4

LED4 DISABLE

DISABLE4

3599 F01

Figure 1. Block Diagram

3599ff

8

For more information www.linear.com/LT3599

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