MP24892

Step Down White LED Driver

MP24892 Rev. 1.0

www.MonolithicPower.com

1

11/3/2011

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

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP24892 is a high-efficiency step-down

converter that functions in continuous current

mode to drive high-brightness LED. It can take

a wide input voltage range of 6V–45V.

The MP24892 employs a hysteretic control

architecture to regulate a high-accuracy LED

current, which is measured through an external

high-side current-sensing resistor. Moreover,

this control scheme provides optimal circuit

stabilization and a very quick response time

without loop compensation. Its low 202mV

average feedback voltage reduces power loss

and improves the converter efficiency.

The MP24892 implements PWM and analog

dimming together through the DIM pin.

The MP24892 includes thermal overload

protection that prevents damage in the event of

an output overload.

The MP24892 is available in a small TSOT23-5

package.

FEATURES

 Wide 6V-to-45V Input Range

 1A Output Current

 High Efficiency (>95%)

 Hysteresis Control

 PWM & Analog Dimming

 1000:1 PWM Dimming Resolution

 Thermal Shutdown

 Inherent Open LED Protection

 Short LED Protection

 Available in a TSOT23-5 Package

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 the Products, Quality

Assurance page.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

R

45

SENSE

D1

L1

IN

RS

SW

EN/DIM

GND

MP24892