Supertex inc.
EL Driver Demoboard
General Description
The HV809DB1 EL Driver demoboard contains all the
circuitry necessary to drive an EL (Electroluminescent)
lamp. Simply connect it to the AC line and a lamp as shown
below.
For additional assistance in designing EL driver circuits,
please refer to application note AN-H36 (EL Lamp Driver
Circuits).
Specifications
Supply voltage
Supply current
Lamp size range
Lamp frequency
HV809DB1
120VAC
~60mA
Up to 100in
2
~400Hz
Board Layout and Connection Diagram
ON/OFF
Switch
To
EL Lamp
HV809
120VAC
Input
Diode
Bridge
R
EL
R
LIMIT
C
DD
C
IN
Fuse
EN - Enable Switch
Enables/Disables the lamp driver. The internal logic high
(V
DD
) disables the driver and a logic low (GND) enables the
driver.
VA and VB - Lamp Connections
Connects to an EL lamp. Polarity is irrelevant.
120V AC - Off-line Voltage
Supplies the high voltage power.
Connections:
The specific external components used in the above circuit
are:
Diode Bridge, C
IN
= 22µF 200V, C
DD
= 0.1µF 16V, R
EL-Osc
=
1.0MΩ, R
LIMIT
= 51Ω (to limit the inrush current during power
up), a 375mA Pico Fuse, and a 15W heat sink. The following
typical performance was observed in the lab for HV
IN
= 170V
DC to simulate a rectified 120V AC.
Lamp Size
(in
2
)
Typical Performance
I
IN
(mA)
f
EL
(Hz)
Brightness
(ft-lm)
10
20
35
55
70
90
100
6.4
11.3
22.4
33.1
41.9
52.3
56.5
385
385
385
385
385
385
385
29.5
22.8
21.4
20.6
19.8
15.5
14.0
Supertex inc.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
HV809DB1
HV809DB1 Circuit Schematic
Fuse
R
LIMIT
HVIN
On/Off
Switch
D1
VDD
D3
OSC1
VA
HV809K2
REL-Osc
1MΩ
EL Lamp
VB
120VAC
C
DD
0.1µF
D2
D4
GND
C
IN
22µF
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)
©2010
Supertex inc.
All rights reserved. Unauthorized use or reproduction is prohibited.
092810
2
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
Supertex inc.
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