MP24833

3A, 55V

White LED Driver

MP24833 Rev. 1.0

www.MonolithicPower.com

1

05/05/2010

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

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP24833 is a 55V, 3A, white LED driver

suitable for step-down, inverting step-up/down

and step-up applications. It achieves 3A output

current over a wide input supply range with

excellent load and line regulation. Current mode

operation provides fast transient response and

eases

loop

stabilization.

Fault

condition

protection

includes

thermal

shutdown,

cycle-by-cycle peak current limiting, open strings

protection and output short circuit protection.

The MP24833 incorporates both DC and PWM

dimming onto a single control pin. The separate

input reference ground pin allows for direct

enable and/or dimming control for a positive to

negative power conversion.

The MP24833 requires a minimal number of

readily-available standard external components

and is available in an SOIC8E package.

FEATURES

• 3A Maximum Output Current

• Unique Step-Up/Down Operation (Buck-

Boost Mode)

• Wide 4.5V-to-55V Operating Input Range

for Step-Down Applications (Buck Mode)

• 0.19Ω Internal Power MOSFET Switch

• Fixed 200kHz Switching Frequency

• Analog and PWM Dimming

• 0.198V Reference Voltage

• 6μA Shutdown Mode

• No Minimum Number of LEDs Required

• Stable with Low ESR Output Ceramic

Capacitors

• Cycle-by-Cycle Over-Current Protection

• Thermal Shutdown Protection

• Open Strings Protection

• Output Short-Circuit Protection

• Available in an SOIC8E Package

APPLICATIONS

• General LED Illumination

• LCD Backlight Panels

• Notebook Computers

• Automotive Internal Lighting

• Portable Multimedia Players

• Portable GPS Devices

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

BST

OVP

SW

VIN

EN/DIM

VDD

EN/DIM

INGND

VSS

L

D

1

4.5V<VIN<55V

5

OFF

ON

DC or PWM Input

6

2

FB

R

FB

4

8

7

3