HV852DB1 Datasheet, PDF (1/2 Pages) Supertex, Inc – High Voltage, Low Noise, Inductorless EL Lamp Driver Demoboard

HV852DB1
High Voltage, Low Noise,
Inductorless EL Lamp Driver Demoboard
General Description
The Supertex HV852DB1 demo board 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.
Specifications
Parameter
Input Voltage
Supply Current
Lamp Size
Lamp Frequency
Value
2.4V to 5.0V
25mA
1.5in²
245Hz
HV852DB1 Schematic and Board Layout
V_DD
R_EL
C_DD
V_A
EN
V_B
CLK_IN
GND
HV852DB1
CLK_EN
Actual Dimensions: 13mm x 8mm
Connections:
EN - Enable Input
Enables/Disables the lamp driver. Logic high (V_DD), 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_DD - IC Supply
Supplies the HV852 EL driver IC. The supplied circuit is
optimized for 2.4V to 5.0V operation.
V_A and V_B - Lamp Connections
Connects to an EL lamp. Polarity is irrelevant.
CLK_EN - Clock Enable
To use external clock for setting the EL lamp frequency, this
pin will need to be connected to V_DD. To set the lamp frequency
via R_EL, this pin will need to be connected to GND.
CLK_IN - Logic Input
An external logic clock applied to this pin can be used to set
the EL lamp frequency. When using external clock signal,
R_EL will need to be removed, and R_EL pin will need to be
connected to GND. CLK_EN will need to be connected to V_DD
when an external clock signal is used. Connect both CLK_EN
and CLK_IN to GND when not in use.
GND - Circuit Ground
Connect to V_DD negative terminals. Supply bypass capacitor
for V_DD is provided on the demo board. External supply
bypass capacitors are not necessary.
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