MP2483

2.5A, 55V, Programmable Frequency

White LED Driver

MP2483 Rev. 1.0

www.MonolithicPower.com

1

12/25/2013

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

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2483 is a 55V, 2.5A, white LED driver

suitable for either step-down or inverting

step-up/down applications. It achieves 2.5A

peak 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 MP2483 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 MP2483 requires a minimum number of

readily available standard external components

and is available in 10-pin 3mm x 3mm QFN

package and 14-pin SOIC14 packages.

FEATURES

• 2.5A 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)

• 0.28Ω Internal Power MOSFET Switch

• Adjustable Switching Frequency

• Analog and PWM Dimming

• 0.198V Reference Voltage

• 5μA Shutdown Mode

• No Minimum LED 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 10-Pin 3x3 QFN Package and

14-Pin SOIC14 Package

APPLICATIONS

• General LED Illuminations

• LCD Backlight Panels

• Handheld Computers

• Automotive Internal Lighting

• Portable Multimedia Players

• Portable GPS Devices

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

VDD OVP

BST

SW

FB

RSET

COMP

MP2483

VSS

INGND

EN/DIM

OFF ON

L1

4.7

C3

100nF

D1

B360A

C2

2.2

C1

10

VIN

4.5V<VIN<55V

C4

1nF

DC or PWM Input

R1

R2

R3

C5

1nF

R4