HV832DB1 Datasheet, PDF (1/2 Pages) Supertex, Inc – Dual EL Lamp Driver

HV832DB1
HV832DB1
Dual EL Lamp Driver
Introduction
The Supertex HV832DB1 demo board contains all necessary
circuitry to demonstrate the features of the HV832 dual EL lamp
driver.
Simply connect it to a power supply and a lamp as shown below.
For additional assistance in designing EL driver circuits, please
refer to application notes AN-H33 (effect of external components
on performance of Supertex EL drivers), application note AN-
H44 (HV832 application circuits), and AN-H43 (EL lamp driver
circuits to reduce lamp audible noise).
Specifications
Input Voltage
Supply Current
Lamp Size Range
Lamp Frequency
Converter Frequency
3.0V to 4.2V
40mA Max.
Up to 2.7in²
417Hz
53.4KHz
Board Layout and Connections
VDD
EL1 Com Com EL2
CDD
Re
Ce
Cs
HV832
EN-SW
Diode
LX
VIN
CIN
GND
Demo Board Connections:
Control lamp selection/Enable Input (EN-SW)
Various modes of the device are selected via the control pin/EN-
SW. Each logic pulse applied to the control pin/EN-SW will
cause the device to change to the next mode. The sequence for
the modes is: 1) EL1 on, 2) EL2 on, 3) both EL1 and EL2 on, and
4) device shuts down. This input may be connected to a
mechanical switch, or to a logic circuit output that has a source
impedance of less than 20KΩ.
V_DD IC Supply
Supplies the HV832 EL driver IC. The supplied circuit is
optimized for 3.0 to 4.2 volt operations. Connect to positive
terminal of a power supply.
V_IN Inductor Supply
Supplies the high voltage power converter. Connect to positive
terminal of a power supply.
GND Circuit Ground
Connect to V_DD and V_IN negative terminals. Supply bypass
capacitor for both V_DD and V_IN are provided on the demo board.
External supply bypass capacitors are not necessary.
EL1 and EL2 Lamp Connections
Connects to lamps 1 and 2. Polarity is irrelevant.
Com Lamp Connections
Connects to the other side of lamps 1 and 2. Polarity is irrelevant.
12/14/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex prod₁ucts, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.