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High Voltage EL Lamp Driver

HV830

Features

❏ 2.0V to 9.5V operating supply voltage

❏ DC to AC conversion

❏ 200V peak-to-peak typical output voltage

❏ Large output load capability – typically 50nF

❏ Permits the use of high-resistance elastomeric lamp

connectors

❏ Adjustable output lamp frequency to control lamp color,

lamp life, and power consumption

❏ Adjustable converter frequency to eliminate harmonics and

optimize power consumption

❏ Enable/disable function

❏ Low current draw under no load condition

❏ Very low standby current – 30nA typical

General Description

The Supertex HV830 is a high-voltage driver designed for driving

EL lamps of up to 50nF. EL lamps greater than 50nF can be

driven for applications not requiring high brightness. The input

supply voltage range is from 2.0V to 9.5V. The device uses a

single inductor and a minimum number of passive components.

The nominal regulated output voltage that is applied to the EL

lamp is

±100V. The chip can be enabled by connecting the

resistors on R

connected to GND.

The HV830 has two internal oscillators, a switching MOSFET,

and a high-voltage EL lamp driver. The frequency for the switch-

ing converter MOSFET is set by an external resistor connected

between the R

driver frequency is set by an external resistor connected be-

connected between the L

capacitor is connected between C

The switching MOSFET charges the external inductor and

increase. Once the voltage at C

100V, the switching MOSFET is turned OFF to conserve power.

switched in opposite states to achieve 200V peak-to-peak across

the EL lamp.

Pin Configuration

Applications

❏ Handheld personal computers

❏ Electronic personal organizers

❏ GPS units

❏ Pagers

❏ Cellular phones

❏ Portable instrumentation

Absolute Maximum Ratings*

-0.5V to +10V

Output Voltage, V

Cs

-0.5V to +120V

Operating Temperature Range

-25

°C to +85°C

Storage Temperature Range

-65

°C to +150°C

Power Dissipation

400mW

Note:

*All voltages are referenced to GND.

Package Options

Device

Input Voltage

8-Lead SO

Die

HV830

2.0V to 9.5V

HV830LG

HV830X

Ordering Information

V

DD

R

EL-osc

R

SW-osc

V

A

L

x

GND

1

2

3

4

8

7

6

5

SO-8

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.