MP3801

190Vpp High Voltage

EL Lamp Driver

MP3801 Rev. 1.0

www.MonolithicPower.com

1

1/25/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3801 is a high output voltage, DC to AC

converter

designed

for

driving

Electroluminescent (EL) lamps of up to 5 square

inches. The device operates from an input

voltage range of 2.5V to 5.5V, making it suitable

for

1-cell

Li-Ion

and

2

or

3-cell

alkaline/NiCad/NiMH battery applications. The

device uses a single inductor and a minimum

number of passive components. The MP3801

converts a low-voltage DC input to a ±95V

regulated output voltage that drives the EL lamp.

The MP3801 is comprised of two stages: a boost

stage and a H-bridge lamp driver stage. The

boost stage converts the input voltage up to 95V.

The H-bridge stage alternately switches the 95V

to each terminal of the EL lamp.

The

MP3801

has

two

separate

internal

oscillators for the boost and H-bridge stages.

The frequency of each oscillator is set

independently

via

external

resistors.

This

flexibility allows the EL lamp circuit to be

optimized for maximum performance. Also, the

IC can be enabled /disabled by connecting these

The MP3801 is available in an 8-pin MSOP

package.

FEATURES

• 2.5V to 5.5V DC Input Voltage

• Single Cell Lithium-Ion Compatible

• 10nA Shutdown Current

• Adjustable EL Lamp Frequency

• Adjustable Converter Frequency

• Available in MSOP-8

• Split Supply Capability

APPLICATIONS

• Portable Multimedia Players

• LCD Backlighting

• PDAs

• Handheld Wireless Communication

• Mobile Phones

• Remote Controls

• Global Positioning Systems (GPS)

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP3801

GND

8

7

6

5

1

2

3

4

EL LAMP

BAS21

3.3nF

100V

EN

OFF ON