Supertex HV853DB1 Manual

Supertex inc.
High Voltage, Low Noise, Inductorless
General Description
The Supertex HV853DB1 demoboard contains all the
necessary circuitry to demonstrate the features of the HV853
EL lamp driver. The HV853 is the low noise version of the EL
driver HV852 with improved EMI performance.
Simply connect it to a power supply and a lamp as shown in
Figure 1. For additional assistance with the HV853 demoboard
circuit, please refer to the HV853 datasheet.
Board Layout and Connection Diagram
Connections:
VDD (IC Supply)
Supplies the HV853 EL driver IC. The supplied demoboard
is optimized for 3.2 to 5.0V operation.
EN (Enable Input)
A logic input which enables/disables the driver. Connect
EN to logic high (VDD) to enable the driver and to logic low
(GND) to disable the driver. This input may be connected to
a mechanical switch or to a logic circuit output.
CLK (Clock Input)
IN
A logic input pin to which an external clock can be applied to
set the EL lamp frequency. CLKEN has to be connected to
V when external clock input is used. Also, the R
DD
needs to be removed and the R
to ground. Connect CLKIN to GND if not used.
Note:
All of the above connections must be made before powering up the supply voltages.
Doc.# DSDB-HV853DB1
A032813
EL Lamp Driver Demoboard
VDD
EN
CLKIN
GND
Actual Dimensions: 13mm x 8mm
EL
pin needs to be connected
EL
Specifications
Parameter
Input voltage:
Supply current:
Lamp size:
Lamp frequency:
GND (Circuit Ground)
Connect to VDD negative terminal. Supply bypass capaci-
tor for VDD is provided on the demoboard. External supply
bypass capacitors are not required.
VA and VB (Lamp Connections)
They connect to EL lamp terminals. Polarity is irrelevant.
CLKEN (Clock Enable)
Logic input pin which enables/disables the external clock ap-
plied. Logic high (VDD) will cause the EL lamp frequency to
be set by the CLKIN input. Logic low (GND) will cause the EL
lamp frequency to be set by the external R
resistor
HV853DB1
3.2V to 5.0V
0.93in and 1.5in
2
VA
VB
CLKEN
resistor.
EL
Supertex inc.
www.supertex.com
Value
18mA
2
274Hz