IMP803/D1 IMP [IMP, Inc], IMP803/D1 Datasheet

IMP803/D1

Manufacturer Part Number

IMP803/D1

Description

HIGH-VOLTAGE EL LAMP DRIVER

Manufacturer

IMP [IMP, Inc]

Datasheet

1.IMP803D1.pdf (8 pages)

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The IMP803 is an Electroluminescent (EL) lamp driver with the four EL

lamp driving functions on-chip. These are the switch-mode power sup-

ply, its high-frequency oscillator, the high-voltage H-bridge lamp driver

and its low-frequency oscillator. The IMP803 drives EL lamps of up to

30nF capacitance to high brightness; EL lamps with capacitances greater

than 30nF can be driven, but will be lower in light output. The typical

regulated output voltage that is applied to the EL lamp is 180V peak-to-

peak. The circuit requires few external components, a single inductor,

single diode, two capacitors and three resistors. Two of these resistors

set the frequency for two internal oscillators.

The IMP803 operates over a 2.0V to 6.5V supply voltage range. A

regulated, low-power source can supply the low quiescent current of the

IMP803. The inductor may be driven from an independent, unregulated

supply voltage in dual supply applications.

An internal circuit shuts down the switching regulator when the lamp

drive voltage reaches 180V peak-to-peak. This conserves power and

extends battery life.

The IMP803 is available in MicroSO and SO-8 packages and in die or

wafer form.

SW-OSC

Block Diagram

EL-OSC

GND

IMP803

Oscillator

Switch

Regulation

Control

Lamp Drive

Oscillator

–

REF

408-432-9100/www.impweb.com

Output

Bridge

Driver

N Low Power: 420µA typical V

N Wide operating voltage range - from 2.0V to 6.5V

N 180V peak-to-peak typical AC output voltage

N Large output load capability - drive lamps

N Adjustable output lamp frequency for control of

N Adjustable converter frequency to minimize

N Device can be Enabled/Disabled

N Low quiescent current – 20nA (disabled)

N High-Voltage CMOS Process

N MicroSO package option

N GPS units/Pagers/Cellular phones

N PDAs/Handheld computers

N Safety illumination

N Portable instrumentation

N Battery-operated displays

N LCD modules

N Toys

with more than 30nF capacitance

lamp color, lamp life, and power consumption

power consumption

803_01.eps

IMP803

Key Features

Applications

current

Related parts for IMP803/D1

IMP803/D1 Summary of contents

Page 1

The IMP803 is an Electroluminescent (EL) lamp driver with the four EL lamp driving functions on-chip. These are the switch-mode power sup- ply, its high-frequency oscillator, the high-voltage H-bridge lamp driver and its low-frequency oscillator. The IMP803 drives EL lamps ...

Page 2

Pin Configuration IMP803 R 2 SW-OSC Ordering Information 803 IMP LG 2.0V to 6.5V 803 IMP IMA 2.0V to ...

Page 3

vs. Inductor Value CS IN 100 200 400 600 Inductor (µ vs 100 L = 470µ ...

Page 4

Pin Descriptions SW-OSC GND EL-OSC External Components Diode ...

Page 5

Test and Application Circuit, 3.0V Figure 1 shows the IMP803 configured to drive a 3-square-inch EL lamp, represented as a 10nF capacitor. With a 3.0V input, the EL lamp will be driven to moderate brightness OFF ...

Page 6

Test and Application Circut, 6.0V At higher input voltage levels, the IMP803 will drive large EL lamps. Figure 3 shows a 6.0V circuit configuration that will drive a ...

Page 7

Dual Supply Operation with 1.5V Battery The IMP803 can also be operate from a single battery cell when a regulated voltage higher than 2.0V is also available. This dual supply configuration, shown in Figure 5, uses the regulated voltage to ...

Page 8

Package Dimensions 0.10mm e 0.004in A1 b IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, ...

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