LT3755EUD-1-PBF(RevA) View Datasheet(PDF) - Linear Technology

Part Name

Description

Manufacturer

LT3755EUD-1-PBF
(Rev.:RevA)

40VIN, 75VOUT LED Controller

Linear Technology 

BLOCK DIAGRAM

LT3755/LT3755-1

SHDN/UVLO – A6

+

1.22V

2μA

FB

SHDN

VC

–

PWMOUT PWM

VIN

+

1.3V

OVFB

COMPARATOR

– LDO

1.25V

+A8

7V

1.25V

+ A5

–gm

10μA AT

FB = 1.25V

SHORT-CIRCUIT

DETECT

+

–+ 150mV

A10

–

ISN

SCILMB

gm

+ EAMP

ISP

5k

A1

–

CTRL

CTRL

+ BUFFER

1.1V +A3

Q2

–

VREF

–

+A7

2V

50k

140μA

FAULT

LOGIC

TSD

10μA

10μA AT

A1+ = A1–

SCILMB

+

–A2 PWM

COMPARATOR

VC

SSCLAMP

RAMP

GENERATOR

10μA

1.25V

50KHz TO 1MHz

OSCILLATOR

+

+

– FREQ

PROG

RQ

S

DRIVER

ISENSE

A4

–

1.2V

FB +

INTVCC

GATE

SENSE

GND

OPENLED

OPTION

FOR

LT3755

SS

RT

SYNC

OPTION FOR

LT3755-1

37551 BD

37551fa

9

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