MP24894

Step-Down WLED-Current Controller

with Wide 6V to 60V Input Voltage

MP24894 Rev 1.01

www.MonolithicPower.com

1

12/20/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP24894 is a high-efficiency step-down

controller. It is designed to operate in

continuous current mode (CCM) to power LEDs

of high-brightness with a wide input voltage

range of 6V to 60V.

The MP24894 employs a hysteretic control

architecture that accurately regulates LED

current with a feedback coming from an external

high-side current-sense resistor. This control

scheme optimizes circuit stabilization and fast

response time without loop compensation. Its

low 200mV average feedback voltage reduces

power loss and improves the converter’s

efficiency.

The MP24894 implements PWM and analog

dimming together through the EN/DIM pin.

The MP24894 includes thermal overload

protection in case of output overload.

The MP24894 is available in TSOT6 package.

FEATURES

• Wide 6V to 60V Input Range

• Able to Drive >1A LED Load

• Hysteresis Control

• High Efficiency (>95%)

• 2500:1 PWM Dimming Ratio

• Open LED Protection

• Short LED Protection

• Thermal Shutdown

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 Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

6V-60V

MP24894

IN

RS

DR

GND

VCC

EN/DIM

D1

L1