HV823
Block Diagram
L
x
V
DD
C
s
R
SW-osc
Enable *
Switch
Osc
Q
GND
Disable
V
A
+
C
_
Q
Vref
Output
Osc
Q
V
B
R
EL-osc
Q
* Enable is available in die form only.
Figure 1: Test Circuit, V
IN
= 3.0V
ON = V
DD
OFF = 0V
(Low input current with moderate output brightness).
2M
Ω
1
750K
Ω
560
µ
H
V
DD
= V
IN
= 3.0V
1N4148
0.1
µ
F
2
1
V
DD
R
EL-osc
V
A
V
B
GND
8
2.0K
Ω
2
3
4
R
SW-osc
C
s
L
x
7
10nF
6
5
Equivalent to 3 square inch lamp.
0.1
µ
F
100V
HV823
Typical Performance
Lamp Size
3.0 in
2
Notes:
1. Murata part # LQH4N561K04 (DC resistance < 14.5Ω)
2. Larger values may be required depending upon supply impedance.
V
IN
3.0v
I
IN
25mA
V
CS
65v
f
EL
385Hz
Brightness
6.5ft-lm
For additional information, see Application Notes AN-H33 and AN-H34.
3
SUPERTEX [ Supertex, Inc ]
