HV823X Ver la hoja de datos (PDF) - Supertex Inc

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HV823X

High Voltage EL Lamp Driver

Supertex Inc 

Split Supply Configuration Using a Single

Cell (1.5V) Battery

The HV823 can also be used for handheld devices operating

from a single cell 1.5V battery where a regulated voltage is

available. This is shown in Figure 5. The regulated voltage

can be used to run the internal logic of the HV823. The

amount of current necessary to run the internal logic is

typically 100µA at a VDD of 3.0V. Therefore, the regulated

voltage could easily provide the current without being loaded

down. The HV823 used in this configuration can also be

enabled/disabled via logic control signal on the RSW and REL

resistors as shown in Figure 4.

HV823

Split Supply Configuration for Battery

Voltages of Higher than 9.5V

Figure 5 can also be used with high battery voltages such as 12V

as long as the input voltage, VDD, to the HV823 device is within

its specifications of 2.0V to 9.5V.

Figure 5: Split Supply Configuration

ON =VDD

OFF = 0

VDD = Regulated

Voltage

+

VIN = Battery

Voltage -

Remote

Enable

REL

RSW

Lx

1N4148

0.1µF*

CS

100V

1 VDD REL-osc 8

2 RSW-osc

VA 7

3 Cs

VB 6

4 Lx

GND 5

HV823LG

EL Lamp

*Larger values may be required depending upon supply impedance.

For additional information, see Application Notes AN-H33 and AN-H34.

©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.

8

11/12/01

1235 Bordeaux Drive, Sunnyvale, CA 94089

TEL: (408) 744-0100 • FAX: (408) 222-4895

www.supertex.com

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