MP24893

Step Down White LED Driver

with Wide 6V-to-36V Input Voltage

MP24893 Rev.1.02

www.MonolithicPower.com

1

12/7/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP24893 is a high efficiency step-down

converter designed in continuous current mode

for driving the high brightness LEDs from wide

input voltage of 6V to 36V.

The MP24893 employs hysteretic control

architecture to regulate a highly accurate LED

current, which is measured through an external

high-side current-sense resistor. Moreover, this

control

scheme

provides

optimal

circuit

stabilization and a very quick response time

without loop compensation. Its low 200mV

average feedback voltage reduces power loss

and improves the converter efficiency.

The MP24893 implements PWM and analog

dimming together through the DIM pin.

The MP24893 includes under-voltage lockout,

thermal overload protection to prevent damage

in the event of an output overload.

The MP24893 is available in TSOT23-5 and

QFN6 packages.

FEATURES

• Internal 36V MOSFET

• Wide 6V-to-36V Input Range

• 1A Output Current

• High Efficiency

• Hysteretic Control

• PWM and Analog Dimming

• 1000:1 PWM Dimming Resolution

• UVLO, Thermal Shutdown

• Available in TSOT23-5 and QFN6 Packages

APPLICATIONS

• Low-Voltage Halogen Replacement

• Low-Voltage General Illumination

• Automotive/Decorative LED Lighting

• Signs/Emergency Lighting

• LED Backlighting

All MPS parts are lead-free and adhere to the RoHS directive. For MPS

green status, please visit MPS website under Products, Quality Assurance

page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

V

IN

6V-36V

R

SENSE

D1

L1

IN

C

IN

RS

SW

EN/DIM

GND

MP24893