IMP IMP803LG, IMP803IMA Datasheet

© 2000 IMP, Inc. 408-432-9100/www.impweb.com 1

IMP803

IMP803

POWER MANAGEMENT

High-

High-VV

olt

olt

ag

ag

e EL Lam

e EL Lam

p Dr

p Driviverer

◆ GPS units/Pagers/Cellular phones

◆ PDAs/Handheld computers

◆ Safety illumination

◆ Portable instrumentation

◆ Battery-operated displays

◆ LCD modules

◆ Toys

◆ Low Power: 420µA typical VDDcurrent

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

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

◆ Large output load capability - drive lamps

with more than 30nF capacitance

◆ Adjustable output lamp frequency for control of
lamp color, lamp life, and power consumption

◆ Adjustable converter frequency to minimize
power consumption

◆ Device can be Enabled/Disabled

◆ Low quiescent current – 20nA (disabled)

◆ High-Voltage CMOS Process

◆ MicroSO package option

Key Features

Applications

–

+

803_01.eps

V

DD

1

L

X

4

C

S

3

V

A

7

V

B

6

R

SW-OSC

2

Switch

Oscillator

Regulation

Control

IMP803

Bridge
Output

Driver

Q

Q

Q

V

REF

Lamp Drive

Oscillator

C

GND

5

R

EL-OSC

8

Q

The IMP803 is an Electroluminescent (EL) lamp driver with the four EL
lamp driving functions on-chip. These are the switch-mode power sup­ply, 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-to­peak. 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.

Block Diagram

IMP803

IMP803

2 408-432-9100/www.impweb.com © 2000 IMP, Inc.



Parameter Symbol Conditions Min Typ Max Units

ON-resistance of MOS Switch R

DS(ON)

I = 100mA 3.5 8 Ω

Output Voltage Regulation V

CS

VDD= 2.0 to 6.5V 80 90 100 V

Output Voltage Peak-to-peak (in regulation) VA-V

B

VDD= 2.0 to 6.5V 160 180 200 V

Quiescent VDDSupply Current, Disabled I

DDQ

V

RSW-OSC

< 100mV 20 200 nA

Input Current at VDDPin I

DD

VDD= 3.0V, See Figure 1 420 700 µA

Input Current at VDDPin I

DD

VDD= 5.0V, See Figure 2 500 750 µA

Input Current: IDDPlus Inductor Current I

IN

VDD= 3.0V, See Figure 1 20 31 mA

Output Voltage at V

CS

V

CS

VDD= 3.0V, See Figure 1 60 74 100 V

V

A-B

Output Drive Frequency f

EL

VDD= 3.0V, See Figure 1 300 370 430 Hz

Switching Frequency f

SW

VDD= 3.0V, See Figure 1 50 70 90 kHz

Switching Duty Cycle D

SW

VDD= 3.0V, See Figure 1 88 %

4L

X

3C

S

2R

SW-OSC

1V

DD

5 GND

6V

B

7V

A

8R

EL-OSC

803_02.eps

IMP803

SO/ MicroSO

Part Number Input Voltage Regulated Output Voltage Temperature Range Pins-Package

IMP803LG 2.0V to 6.5V Yes – 40°C to +85°C 8-SO
IMP803IMA 2.0V to 6.5V Yes – 40°C to +85°C 8-MicroSO
IMP803SX* 2.0V to 6.5V Yes 25°C Dice
IMP803/D1** 2.0V to 6.5V Yes 25°C Dice

VDD, V

RSW-OSC

and V

REL-OSC

. . . . . . . . . . . . . . . –0.5V to +7.0V

V

CS

, LX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to +120V

Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C

Storage Temperature Range . . . . . . . . . . . . . . –65°C to +150°C

Power Dissipation (SO) . . . . . . . . . . . . . . . . . . 400mW

Power Dissipation (MicroSO) . . . . . . . . . . . . . 300mW

V

A

, VB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to VCS(pin 3)

Unless otherwise noted, VDD= 3.0V, RSW= 750kΩ, REL= 2.0MΩ, and TA= 25°C.

Note: All voltages are referenced to GND.

These are stress ratings only and functional operation is not
implied. Exposure to absolute maximum ratings for prolonged
time periods may affect device reliability.

Pin Compatible With HV803 and IMP560

Ordering Information

Pin Configuration

Absolute Maximum Ratings

Electrical Characteristics

* Disable pad not active

** Disable pad active

Add /T to ordering part number for Tape and Reel.

IMP803

IMP803

© 2000 IMP, Inc.

Electroluminescent Lamp Driver

3

Typical Characteristics

100

(mA)

IN

(V), I

CS

V

100

(mA)

IN

(V), I

CS

V

VCS, IIN vs. Inductor Value

80

60

40

20

0

0

V

CS

I

IN

200 600 800400 1000

Inductor (µH) 803_03.eps

V

L = 470µH

80

60

40

20

0

2.0

3.0 4.0 5.0 6.0

CS

V

= 3.0V

IN

IDD vs. V

800

L = 560µH

700

600

DD

(µA)

DD

500

I

400

300

2.0

, I

vs. V

IN

IN

V

CS

I

IN

V

(V)

IN

803_04.eps

100

(mA)

IN

(V), I

CS

V

80

60

40

20

0

L = 330µH

2.0

3.0 4.0 5.0 6.0

VDD (V)

V

, I

vs. V

CS

IN

IN

V

CS

I

IN

3.0 4.0 5.0 6.0

V

(V)

IN

803_6.eps

803_07.eps

100

80

60

(mA)

IN

40

(V), I

CS

V

20

0

2.0

V

, I

vs. V

CS

IN

L = 1mH

3.0 4.0 5.0 6.0

V

IN

IN

(V)

V

, I

vs. V

CS

IN

IN

100

L = 560µH

V

CS

I

IN

803_05.eps

80

60

(mA)

IN

40

(V), I

CS

V

20

0

2.0

3.0 4.0 5.0 6.0

VIN (V)

V

CS

In Regulation

I

IN

803_08.eps