1

HV825

Absolute Maximum Ratings*

Supply voltage, V

DD

-0.5V to +2.5V

Operating Temperature Range

-25

°C to +85°C

Storage Temperature Range

-65

°C to +150°C

MSOP-8 Power Dissipation

300mW

SO-8 Power Dissipation

400mW

Note:

*All voltages are referenced to GND.

High Voltage EL Lamp Driver

Features

❏ 1.0V to 1.6V operating supply voltage

❏ DC to AC conversion

❏ Output load of typically up to 6nF

❏ Adjustable output lamp frequency

❏ Adjustable converter frequency

❏ Enable function

General Description

The Supertex HV825 is a high voltage driver designed for driving

EL lamps typically up to 6nF. The input supply voltage range is

from 1.0V to 1.6V. The device uses a single inductor and a

minimum number of passive components. Typical output

voltage that can be applied to the EL lamp is

±56V.

The HV825 can be enabled/disabled by connecting the R

SW-osc

The HV825 has two internal oscillators, a switching bipolar

junction transistor (BJT), and a high voltage EL lamp driver. The

frequency for the switching BJT is set by an external resistor

connected between the R

EL lamp driver frequency is set by an external resistor connected

between R

An external inductor is

connected between the L

connected between V

The switching BJT charges the external inductor and discharges

it into the 0.01 to 0.1

µF, 100V capacitor at C

will start to increase. The outputs V

an H-bridge and are switching in opposite states to achieve a

peak-to-peak voltage of two times the V

lamp.

Pin Configuration

Applications

❏ Pagers

❏ Portable Transceiver

❏ Cellular phones

❏ Remote control units

❏ Calculators

1

2

3

4

8

7

6

5

R

SW-osc

V

A

C

s

V

B

GND

top view

SO-8/MSOP-8

For detailed circuit and application information, please refer

to application notes AN-H33 and AN-H34.

Package Options

Device

Input Voltage

8-Lead SO

MSOP-8

Die

HV825

1.0 to 1.6V

HV825LG

HV825MG*

HV825X

* Product supplied on 2500 piece carrier tape reels.

Ordering Information

11/12/01

Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability

indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to

workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the

Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.