VIN

TPS92510

PDIM

EN

COMP

PH

RT/CLK

VSENSE

TSENSE

BOOT

GND

UDG-11042

Pad

T

TPS92510

www.ti.com

SLUSAE4A – JANUARY 2012 – REVISED JUNE 2012

1.5-A Constant-Current Buck Converter for High-Brightness LEDs

with Integrated LED Thermal Foldback

Check for Samples: TPS92510

1

FEATURES

DESCRIPTION

2

•

3.5-V to 60-V Input Voltage Range

The TPS92510 is a 60-V, 1.5-A peak current-mode

•

Integrated 200-m

Ω High-Side MOSFET

step-down converter with an integrated high-side

•

200 mV Internal Voltage Reference

MOSFET. It is specifically designed for driving high-

brightness LEDs with a constant current. The tight-

•

±3% LED Current Accuracy

tolerance, 200-mV internal reference voltage reduces

•

100 kHz to 2.5 MHz Switching Frequency

power dissipation in the current-sense resistor. A

Range

dedicated pulse width modulation input pin allows

•

Dedicated PWM Dimming Input

linear control of the light output.

•

LED Thermal Foldback

The TPS92510 integrates a thermal foldback feature

•

Adjustable UVLO

that reduces the average output current to ensure

that the sensed LED temperature never exceeds a

•

Overcurrent Protection

specific value, improving the reliability of the overall

•

Over-Temperature Protection

system. An integrated frequency synchronization

•

MSOP-10 (DGQ) PowerPAD™ Package

feature

allows

a

reduction

of

unwanted

beat-

frequencies in multi-string applications and simplifies

APPLICATIONS

EMI filtering. The adjustable input voltage UVLO

feature accommodates the various deep discharge

•

Street Lighting

levels of multiple battery types.

•

Emergency Lighting

The TPS92510 includes cycle-by-cycle overcurrent

•

General Illumination

protection, and thermal shutdown protection. It is

•

Industrial and Commercial Lighting

available in a 10-pin MSOP PowerPAD™ package.

•

MR16 LED Bulbs

SIMPLIFIED APPLICATION

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.