LT3755-1 LINER [Linear Technology], LT3755-1 Datasheet

LT3755-1

Manufacturer Part Number

LT3755-1

Description

60V 4-Switch Synchronous

Manufacturer

LINER [Linear Technology]

Datasheet

1.LT3755-1.pdf (28 pages)

Current page: 1 of 28
Download datasheet (362Kb)

FEATURES

APPLICATIONS

TYPICAL APPLICATION

15V TO 58V

4-Switch Single Inductor Architecture Allows V

Above, Below or Equal to V

Wide V

±2% Output Voltage Accuracy

Synchronous Switching: Up to 98.5% Efficiency

±6% LED Current Accuracy: 0V ≤ V

Accurate Rail-to-Rail LED Current Sense with

Monitor Output

Input Current Sense with Monitor Output

PWM and Analog Dimming

Capable of 100W or greater per IC

38-Lead TSSOP with Exposed Pad

Automotive Headlamps/Running Lamps

General Purpose Lighting

OUT

15.8k

499k

28k

Disconnected from V

OUT

0.003

Range: 4.7V to 60V

Range: 0V to 60V (55V LED)

98.5% Efficient 100W (33.3V 3A) Buck-Boost LED Driver

INTV

470nF

200k

1µF

0.1µF

200k

10nF

IVINN

IVINP

EN/UVLO

OVLO

SHORTLED

OPENLED

PWM

IVINMON

ISMON

CLKOUT

CTRL

REF

SYNC

OUT

During Shutdown

2.2k

LT3791

10nF

OUT

86.6k

300kHz

PWMOUT

SGND

INTV

SNSN

PGND

SNSP

< 60V

BST2

BST1

SW2

SWI

BG1

BG2

TG1

TG2

ISN

ISP

0.1µF

10µH

0.1µF

0.004

DESCRIPTION

The LT

driver and voltage regulator controller. The controller

operates from input voltages above, below, or equal to

the output voltage. The LT3791 has a wide 4.7V to 60V

input and 0V to 60V output range along with seamless

transitions between operating modes. A ground reference

voltage FB pin serves as the input for several LED protec-

tion features and also makes it possible for the converter

to operate as a constant-voltage source. The LT3791 is

ideal for a wide variety of applications.

The LT3791 runs in forced continuous mode, which is

ideal for systems with stringent EMI requirements. Fault

protection is provided to survive and report an open or

shorted LED condition. A timer allows the LT3791 to

continue to run, latch off or restart when a fault occurs.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered and True Color PWM

is a trademark of Linear Technology Corporation. All other trademarks are the property of their

respective owners.

60V 4-Switch Synchronous

4.7µF

3791 is a synchronous 4-switch buck-boost LED

2.2µF

100V

×5

0.033

3791 TA01a

Buck-Boost LED Driver

34.2k

LED POWER

3A, 100W

4.7µF

50V

×5

100

BOOST

Controller

Efficiency vs V

INPUT VOLTAGE (V)

BUCK-BOOST

LT3791

BUCK

3791 TA01b

3791f

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