LT3517I(RevA) Просмотр технического описания (PDF) - Linear Technology

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производитель

LT3517I
(Rev.:RevA)

Full-Featured LED Driver with 1.5A Switch Current

Linear Technology 

BLOCK DIAGRAM

CIN

RSENSE

PVIN

LED ARRAY

CFILT

LT3517

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

–

PWM

COMPARATOR

RSQ

SYNC

SS

RT

+

A5

1V

–

VIN

10μA 1V

SS

RAMP

GENERATOR

2.5MHz TO 250kHz

OSCILLATOR

+

+ A6

Q2

–

FREQ

ADJUST

VIN

Figure 1. Buck Mode LED Driver

PWM

2V

SW

MAIN SWITCH

DRIVER

Q1

POWER

SWITCH

A8

GND

VIN

100μA

VREF

+

A7

–

3517 F01

3517fa

7

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