Microchip HV823DB1 Bruksanvisning
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HV823DB1
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Supertex inc.
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HV823DB1
Doc.# DSDB-HV823DB1
B032114
The HV823DB1 EL Driver demoboard contains all the circuitry
necessary to drive an EL (Electroluminescent) lamp. Simply
connect it to a power supply and a lamp as shown below.
The supplied circuit has been optimized to drive an 8.0in2 lamp
from a 3.0 to 3.3V supply. The circuit may be customized with
different component values to suit a particular application.
To assist in customization, various circuits optimized for a
variety of applications are provided. For additional assitance
in designing EL driver circuits, please refer to AN-H34 (HV823
& HV825 EL Lamp Driver Circuits).
Board Layout and Connections
EL Driver
Demoboard
Parameter Value
Supply voltage 3.0 to 3.3V
Supply current ~50mA
Lamp size range 3.0 to 12in2
Lamp frequency ~260Hz
Converter frequency ~50KHz
Connections:
EN - Enable Input
Enables/disables the lamp driver. A logic high (VDD) enables
the driver and a logic low (GND) disables the driver. This
input may be connected to a mechanical switch as shown,
or to a logic circuit output that has a source impedance of
less than 20KΩ.
VDD - IC Supply
Supplies the HV823 EL driver IC. The supplied circuit is op-
timized for 3.0V to 3.3V operation. Current draw is typically
100µA when enabled and less than 1µA when disabled.
VIN
- Inductor Supply
Supplies the high voltage power converter. Current draw is
approximately 50mA.
GND - Circuit Ground
Connect to VDD negative terminal. Supply bypass capacitors
for both VDD and VIN are provided on the demoboard. An ex-
ternal supply bypass capacitor is not necessary.
VA and VB
- Lamp Connections
Connect to EL lamp of 3 to 12 square inches. Polarity is ir-
relevant.
Off
On
EL Lamp
connect together
EN
VDD
VIN
GND
HV 823D B1
V
A
VB
R
EL
R
SW
C
SW
C
DD
C
L
C
D
823
3.0 - 3.3V
Enable
General Description Specications
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | HV823DB1 |
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