Supertex inc.
EL Driver Demoboard
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).
Specifications
Supply voltage
Supply current
Lamp size range
Lamp frequency
HV809DB2
6.0VDC
~170mA
Up to 12.5in
2
~200Hz
Board Layout and Connection Diagram
V+
Supertex inc.
V+
OFF
C
IN
L
X
Q
SW
1
HV809DB2
555
R
D
R
FB
R
C
V
A
C
T
Z
FB
V
A
DC Input
Voltage
ON
V-
- CHV +
D
R
DELAY
1 HV809LG
Connect to
EL Lamp
V-
C
DD
D
SW
R
P
C
R
EL
V
B
V
B
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 12.5in
2
.
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
(in
2
)
V
IN
(V)
I
IN
(mA)
f
EL
(Hz)
Brightness
(ft-lm)
3.0
3.0
6.0
6.0
12.5
12.5
4.5
6.0
4.5
6.0
4.5
6.0
48.4
40.5
81.5
66.9
164.4
130.2
208
208
208
208
208
208
13.5
14.1
13.0
13.6
14.9
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.
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
●
Tel: 408-222-8888
●
www.supertex.com
HV809DB2
HV809DB2 Circuit Schematic
V
IN
+
1
GND
4-AA
Cells
-
SW
C
IN
4.7µF
2
TRIG
3
OUT
4
RESET
U1
555
VCC
8
R
C
51KΩ
LX
330µH
U2
HV809LG
1
HVIN
Z
FB
150V
C
DD
0.1µF
C
HV
2.2µF
2
VDD
3
Osc2
4
Osc1
VA
DISCHG
7
THRSH
6
CNTRL
5
D
BAS21
QSW
VN2224N3
8
VB
7
GND
REL-Osc
6
5
R
EL
2.0KΩ
R
FB
120KΩ
C
T
1.0nF
Bill of Materials
Item
R
C
R
D
R
FB
R
EL
C
IN
C
T
C
HV
C
DD
D
ZFB
QSW
L
X
SW
U1
U2
Description
Thick film chip resistor
Thick film chip resistor
Thick film chip resistor
Thick film chip resistor
Tantalum capacitor
X7R ceramic chip capacitor
Radial electrolytic capacitor
X7R ceramic chip capacitor
250V diode
Zener diode
N-channel MOSFET
Inductor
Slide switch
Timer IC
EL lamp driver IC
Value
51kΩ ±5%
20kΩ ±5%
120kΩ ±5%
2.0MΩ ±5%
4.7µF, 16V
1.0nF, 50V
2.2µF, 250V
0.1µF, 16V
250V
150V, 5%
250V, 1.25Ω
330µH
SPDT
-
200V
Package
0805
0805
0805
0805
1206
0805
6.3mm
0805
SOT-23
DO-35
TO-92
Surface Mount
PC Mount
SO-8
SO-8
Manufacturer
Any
Any
Any
Any
Any
Any
Any
Any
Motorola
Microsemi
Supertex
J.W. Miller
E-Switch
National
Supertex
Part Number
-
-
-
-
-
-
-
-
BAS21
1N5276B
VN2224N3
PM105-331K
EG1271A
LM555CM
HV809LG
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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