MAX4990E Maxim Integrated Products, MAX4990E Datasheet

MAX4990E

Manufacturer Part Number

MAX4990E

Description

High-Voltage +-15kV ESD-Protected Electroluminescent Lamp Driver

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX4990E.pdf (15 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX4990ETD

Manufacturer:

MAXIM/美信

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX4990ETD+T

Manufacturer:

MAXIM/美信

Quantity:

20 000

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Download datasheet (253Kb)

The MAX4990E high-voltage DC-AC converter is ideal

for driving electroluminescent (EL) lamps. The

MAX4990E features a wide +2.4V to +5.5V input range

that allows the device to accept a wide variety of

voltage sources such as single-cell lithium-ion (Li+)

batteries and higher voltage battery chargers. The lamp

outputs of the device generate up to 250V peak-to-

peak output voltage for maximum lamp brightness.

The MAX4990E utilizes an inductor-based boost con-

verter to generate the high voltage necessary to drive

an EL lamp. The boost-converter switching frequency is

set with the combination of an external capacitor con-

nected from SW to GND and an external resistor con-

nected from SLEW to GND.

The MAX4990E uses a high-voltage full-bridge output

stage to convert the high voltage generated by the

boost converter to an AC waveform suitable for driving

the EL panel. The EL output switching frequency is set

with the combination of an external capacitor connect-

ed from EL to GND and an external resistor connected

from SLEW to GND.

The MAX4990E uses a proprietary acoustic noise-

reduction circuit that controls the slew rate of the AC

voltage, reducing audible noise from the EL panel. The

slew rate is set with an external resistor connected from

SLEW to GND.

The MAX4990E features an EL lamp dimming control

(DIM) that allows the user to set the EL output voltage

with a PWM signal, a DC analog voltage, or a resistor

connected from the DIM input to GND. A capacitor

placed in parallel to the resistor on DIM allows the user

to program a slow turn-on/-off time that generates a soft

fade-on/fade-off effect of the EL lamp.

The MAX4990E enters a low-power shutdown mode

(100nA max) when the EN and DIM inputs are connect-

ed to GND. The MAX4990E also enters thermal shut-

down if the die temperature rises above +158°C.

The MAX4990E is available in a space-saving, 14-pin,

3mm x 3mm TDFN package and is specified over the

extended -40°C to +85°C operating temperature range.

19-0886; Rev 0; 8/07

Typical Application Circuits appear at end of data sheet.

Note: The device operates over the -40°C to +85°C operating

temperature range.

MAX4990ETD+

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART

________________________________________________________________ Maxim Integrated Products

PIN-PACKAGE

14 TDFN-EP (3mm x 3mm)

General Description

High-Voltage, ±15kV ESD-Protected

Electroluminescent Lamp Driver

MARK

TOP

ADL

T1433-2

CODE

PKG

+ Denotes a lead-free package.

EP = Exposed paddle.

♦ ESD-Protected EL Lamp Outputs

♦ 250V

♦ Wide +2.4V to +5.5V Input Voltage Range

♦ Resistor-Adjustable Slew-Rate Control for

♦ Externally Driven Lamp and Switching Converter

♦ Capacitor-Adjustable Lamp and Switching

♦ Low 100nA Shutdown Current

♦ DIM Input for Controlling Output Voltage Through

♦ Capacitor Adjustable for Slow Turn-On/-Off

♦ Space-Saving Packages

*EP = EXPOSED PAD. CONNECT EP TO GND OR LEAVE UNCONNECTED.

Audible Noise Reduction

Frequencies

Converter Frequencies

DC Analog Voltage, PWM, or Resistor to GND

TOP VIEW

Keypad Backlighting

MP3 Players

LCD Backlighting

±15kV Human Body Model

±4kV IEC 61000-4-2 Contact Discharge

±15kV IEC 61000-4-2 Air-Gap Discharge

14-Pin, 3mm x 3mm TDFN

P-P

PROTECTION

±15kV

(MAX) Output for Highest Brightness

Yes

Ordering Information

TDFN-EP

MAX4990E

DIM CONTROL

Pin Configuration

Yes

PDAs/Smartphones

Automotive Instrument

Clusters

*EP

www.DataSheet4U.com

Applications

Features

SLEW-RATE

CONTROL

Yes

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