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HV857 데이터 시트보기 (PDF) - Supertex Inc
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HV857
High Voltage EL Lamp Driver for Low Noise Applications
Supertex Inc
HV857 Datasheet PDF : 14 Pages
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Block Diagram
V
DD
R
SW
GND
Rel
Switch
Osc
+
Disable
C_
Vref
V
DD
EL
Osc
Vsen
Q
Q
High
Voltage
Level
Trans-
lators
Q
Q
HV857
L
X
C
S
V
A
V
B
Figure 1: Typical Application/Test Circuit
ON=V
DD
OFF=0
Enable Signal
V
IN
=V
DD
+
V
IN
_
V
DD
1.0
µ
F
1
V
DD
Ω
2
R
SW-osc
2.0M
Ω
3
R
EL-osc
4
Gnd
V
A
8
V
B
7
C
S
6
L
X
5
HV857MG
Equivalent to 3.0in
2
lamp
2.0K
10nF
SB01-15
220
µ
H
3.3nF
100V
Typical Performance
Device Lamp Size
HV857MG
3.0 in
2
V
IN
3.3V
I
IN
20mA
L
X
=220
µ
H Murata (LQH32CN221K21)
SB01-15=150V Sanyo Diode
V
CS
f
EL
Brightness
84V 240Hz 6.0ft-lm
3
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