General Description
The Supertex HV852DB1 demoboard contains all necessary
circuitry to demonstrate the features of the HV852 EL lamp
driver.
Simply connect it to a power supply and a lamp, as shown
below. For additional assistance in implementation of the
HV852 circuit, please refer to the HV852 data sheet.
Board Layout and Connection Diagram
Connections:
EN - Enable Input
Enables/Disables the lamp driver. Logic high (VDD), enables
the driver, and a logic low (GND), disables the driver. This
input may be connected to a mechanical switch, or to a logic
circuit output.
V
Supplies the HV852 EL driver IC. The supplied circuit is
optimized for 2.4 to 5.0V operation.
V
Connects to an EL lamp. Polarity is irrelevant.
GND - Circuit Ground
Connect to V
for V
bypass capacitors are not necessary.
Supertex inc.
A
DD
and V
- IC Supply
DD
is provided on the demo board. External supply
B
Supertex inc.
- Lamp Connections
DD
Actual Dimensions: 13mm x 8.0mm
negative terminals. Supply bypass capacitor
Inductorless EL Lamp Driver Demoboard
●
1235 Bordeaux Drive, Sunnyvale, CA 94089
High Voltage, Low Noise,
CLKIN
GND
VDD
Specifications
Parameter
V
Supply current:
Lamp size:
Lamp frequency:
CLK
To use external clock for setting the EL lamp frequency, this
pin will need to be connected to V
via REL, this pin will need to be connected to GND.
CLK
An external logic clock applied to this pin can be used to set
the EL lamp frequency. When using external clock signal,
R
connected to GND. CLK
when an external clock signal is used. Connect both CLK
and CLK
EN
DD
EL
input voltage:
will need to be removed, and R
EN
IN
- Logic Input
- Clock Enable
IN
to GND when not in use.
●
Tel: 408-222-8888
R
HV852DB1
EL
EN
will need to be connected to V
●
C
www.supertex.com
DD
DD
. To set the lamp frequency
EL
pin will need to be
HV852DB1
2.4 to 5.0V
245Hz
CLKEN
Value
VA
VB
25mA
1.5in
DD
EN
2