Microchip HV833 Manual


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Supertex inc.
Supertex inc.
www.supertex.com
Doc.# DSAN-AN-H45
A082113
AN-H45
Application Note
HV833 EL Lamp Driver Circuits
This application note presents eight EL driver circuits
utilizing the Supertex HV833 integrated circuit. They have
been optimized for a variety of applications and may be used
as is or used as a starting point in designing a circuit for a
particular application.
When constructing and testing one of the driver circuits listed
below, keep in mind that results may differ from those given
due to component tolerances and lamp characteristics.
When making component changes, always remove the
supply voltage rst. After making adjustments, bring up
the supply voltage slowly (starting from the minimum
required device input voltage) while monitoring input
current. Excessive input current may be a good indication
of connection errors or incorrect component values. A sharp
rise in current usually indicates a saturated inductor. To
avoid inductor saturation, use a higher current rated inductor
or increase the conversion frequency by lowering the RSW
resistor value.
Circuit Selector Guide
Circuit
Lamp
Color/
Size
(in2)
Lamp
Brightness1
(ft-lm)
Supply
Voltage
(V)
Supply
Current
(mA)
Output
Voltage
(VP-P)
Output
Frequency
(Hz)
1Green
10.0 2.9 3.3 29.2 159 138
2White
8.8 5.6 3.3 50.7 150 312
3Green
5.5 4.6 3.0 26.8 151 220
4Green
11.0 3.1 3.0/5.0 18.2 171 138
5Green
3.0 8.2 3.3 23.0 167 312
6Green
8.5 6.3 3.3 54.6 177 312
7Green
10.0 6.7 5.0 54.1 157 465
8White
8.8 9.5 3.0/12 24.5 176 465
Notes:
1. Lamp brightness can vary by type and manufacturer.


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: HV833

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