Microchip HV833 Handleiding


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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 îš¿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.
2
AN-H45
Supertex inc.
www.supertex.com
Doc.# DSAN-AN-H45
A082113
Circuit 1
ON = 3.3V
OFF = 0V
Enable
4.7μF
220μH
1N914
0.01μF
100V
750kΩ
+
-
V
IN
3.3V
3.3MΩ
Inductor: Murata LQH43MN221K01
VDD
RSW-Osc
REL-Osc
GND
VA
VB
CS
LX
HV833MG
8
7
6
5
1
2
3
4
Circuit 2
EL Lamp
Enable
4.7μF
220μH
1N914
0.01μF
100V
1.0MΩ
+
-
VIN
3.3V
1.5MΩ
Inductor: Murata LQH43MN221K01
3.3V
VDD
RSW-Osc
REL-Osc
GND
VA
VB
CS
LX
HV833MG
8
7
6
5
1
2
3
4
ON = 3.3V
OFF = 0V
Application
Lamp
Color/
Size
(in2)
Lamp
Brightness
(ft-lm)
Supply
Voltage
(V)
Supply
Current
(mA)
Output
Voltage
(VP-P)
Output
Frequency
(Hz)
PDA’s, HPCs Green/
10.0 2.9 3.3 29.2 159 138
Application
Lamp
Color/
Size
(in2)
Lamp
Brightness
(ft-lm)
Supply
Voltage
(V)
Supply
Current
(mA)
Output
Voltage
(VP-P)
Output
Frequency
(Hz)
Clocks, Radios,
Organizers, PDAs
White/
8.8 5.6 3.3 50.7 150 312
3
AN-H45
Supertex inc.
www.supertex.com
Doc.# DSAN-AN-H45
A082113
Circuit 3
Circuit 4
EL Lamp
Enable
4.7μF
220μH
1N4148
560kΩ
2.0MΩ
Inductor: Murata LQH43MN221K01
3.0V
VDD
RSW-Osc
REL-Osc
GND
VA
VB
CS
LX
HV833MG
8
7
6
5
1
2
3
4
0.01μF
100V
+
VIN
3.0V
-
ON = 3.3V
OFF = 0V
EL Lamp
Enable
4.7μF
220μH
1N914
560kΩ
3.3MΩ
Inductor: Murata LQH43MN221K01
3.0V
VDD
RSW-Osc
REL-Osc
GND
VA
VB
CS
LX
HV833MG
8
7
6
5
1
2
3
4
0.01μF
100V
+
V
IN
5.0V
-
ON = 3.0V
OFF = 0V
Application
Lamp
Color/
Size
(in2
)
Lamp
Brightness
(ft-lm)
Supply
Voltage
(V)
Supply
Current
(mA)
Output
Voltage
(VP-P)
Output
Frequency
(Hz)
Caller IDs, HPCs,
Organizers, Calculators
Green/
5.5 4.6 3.0 26.8 151 220
Application
Lamp
Color/
Size
(in2
)
Lamp
Brightness
(ft-lm)
Supply
Voltage
(V)
Supply
Current
(mA)
Output
Voltage
(VP-P)
Output
Frequency
(Hz)
PDA’s, HPCs Green/
11.0 3.1 3.0/5.0 18.2 171 138


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: HV833

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