Microchip HV809DB2 Manual

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Supertex inc.

www.supertex.com

HV809DB2

Doc.# DSDB-HV809DB2

B032014

General Description

The HV809DB2 EL Driver demoboard contains all the

circuitry necessary to drive an EL (Electroluminescent)

lamp. Simply connect it to a 4.5 to 6.0V DC supply and an

EL lamp as shown below.

For additional assistance in designing EL driver circuits,

please refer to application note AN-H36 (EL Lamp Driver

Circuits).

Board Layout and Connections

EL Driver Demoboard

Specications

Supply voltage 6.0VDC

Supply current ~170mA

Lamp size range Up to 12.5in2

Lamp frequency ~200Hz

Connections:

V+ and V-

DC input supply voltage. V+ is the positive side of the sup-

ply and V- is the return side. It supplies the boost converter

circuit to generate the high DC voltage to the HV809. The

supplied circuit is optimized for an operating range of 4.5 to

6.0 volts.

VA and VB

VA and VB are the EL lamp connections. Polarity is irrel-

evant. Maximum lamp size should be limited to 12.5in2.

Switch

An On/Off slide switch is provided. When in the off position,

it disconnects the input voltage to the circuit.

Typical Performance

Lamp Size

(in2)

VIN

(V)

IIN

(mA)

fEL

(Hz)

Brightness

(ft-lm)

3.0 4.5 48.4 208 13.5

3.0 6.0 40.5 208 14.1

6.0 4.5 81.5 208 13.0

6.0 6.0 66.9 208 13.6

12.5 4.5 164.4 208 14.9

12.5 6.0 130.2 208 15.5

Note:

The differences in brightness in the above measurements are due to the

differences between lamps used (it is within the tolerance of the lamp for

most manufacturers).

Supertex inc. HV809DB2

555

DSW

CDD

O N

OFF

HV809LG

QSW RFB

REL

RDELAY

V+

V-

Connect

EL Lam

V+

V-

Input

Voltage

ZFB

- CHV +

Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives

an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability

to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and

specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)