Microchip HV833DB1 Bedienungsanleitung


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Supertex inc.
Supertex inc.
www.supertex.com
HV833DB1
Doc.# DSDB-HV833DB1
B032114
The Supertex HV833DB1 demoboard contains all necessary
circuitry to demonstrate the features of the HV833 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) and AN-H45 (EL Lamp
Driver Circuits to Reduce Lamp Audible Noise).
Board Layout and Connections
High Voltage
EL Lamp Driver Demoboard
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, or to a
logic circuit output that has a source impedance of less than
20K .Ω
VDD - IC Supply
Supplies the HV833 EL driver IC. The supplied circuit is
optimized for 1.8 to 6.5 volt operation.
VIN - Inductor Supply
Supplies the high voltage power converter.
GND - Circuit Ground
Connect to VDD and VIN negative terminals. Supply bypass
capacitor for both VDD and VIN are provided on the demo
board. External supply bypass capacitors are not necessary.
VA and VB - Lamp Connections
Connect to an EL lamp. Polarity is irrelevant.
Parameter Value
Input voltage 1.8 to 6.5V
Supply current 45mA
Lamp size range 5.5in2 to 10in2
Lamp frequency 250Hz
Converter frequency 70kHz
General Description
HV833
Rsw
REL
CDD
CIN
DIODE
VDD
EN
VIN
GND
VB
VA
EL Lamp
ON
OFF
1.8 - 6.5V
LX
CS
Speciîšżcations
Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives
an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability
to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and
specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)
©2014
Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited.
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA
94089
T
el: 408-222-8888
www.supertex.com
2
HV833DB1
Doc.# DSDB-HV833DB1
B032114
Figure1: HV833DB1 Circuit Schematic
1
2
3
4
VDD
RSW-Osc
VB
REL-Osc
GND
VA
LX
CS
HV833
EL
Lamp
ON = VDD
OFF = 0V
Enable
4.7µF
LX
220µH
1N4148
C
S
10nF
100V
680kΩ
2.0MΩ
0.1µF
+
-
V
DD
+
-
V
IN
8
7
6
5
Typical Performance
The specic external components used in the above circuit are: LX=220µH Murata (LQH43MN221K01), C S = 10nF 100V
NPO. The following was observed when driving a 10in 2 Green lamp.
VIN
(V)
IIN
(mA)
VCS
(V)
fEL
(Hz)
Lamp Brightness
ft-lm cd/m2
2.0 31.1 49.7 232 1.4 4.7
3.0 41.5 67.8 232 3.4 11.5
4.0 34.0 77.2 232 4.3 14.7
5.0 27.7 81.5 232 4.5 15.5
6.0 24.4 84.3 232 4.7 16.0
6.5 24.2 85.3 232 4.8 16.3
The following was observed when driving a 5.5in2 Green lamp
VIN
(V)
IIN
(mA)
VCS
(V)
fEL
(Hz)
Lamp Brightness
ft-lm cd/m2
1.8 26.1 56.3 232 2.3 7.9
2.0 29.1 61.9 232 3.0 10.3
3.0 25.2 78.2 232 4.9 16.8
4.0 18.5 82.7 232 5.2 17.8
5.0 14.7 84.6 232 5.2 17.5
6.0 13.5 85.4 232 5.3 18.1
6.5 12.0 86.9 232 5.4 18.5


Produktspezifikationen

Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: HV833DB1

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