HV857DB1 Ver la hoja de datos (PDF) - Supertex Inc
Número de pieza
componentes Descripción
Fabricante
HV857DB1 Datasheet PDF : 2 Pages
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ON=VDD
OFF=0V
Enable
HV857DB1 Schematic
+
VDD
-
+
VIN
-
0.1µF Cdd
560KΩ
2.0MΩ
1 VDD
VA 8
2 RSW-osc
VB 7
3 REL-osc
CS 6
4 GND
LX 5
HV857MG
Cin
4.7µF
SB01-15
LX=
220µH
HV857DB1
EL Lamp
CS=
3.3nF
100V
* Note: Tie VDD and VIN together if split supplies are not used.
SB01-15=150V Sanyo Diode
Inductor: Murata LQH32CN221K21
Typical Performance
The specific external components used in the above circuit are LX=220µH Murata (LQH32CN221K21), Cs= 3.3nF 100V NPO.
The following was observed when driving a 2.6in2 Green lamp.
VDD=
VIN (V)
1.8
2.0
3.0
4.0
5.0
IIN (mA)
24.3
24.9
24.6
20.3
17.7
VCS (V)
69.6
72.3
85.0
90.0
92.7
fEL (Hz)
250
250
250
250
250
Brightness
ft-lm
cd/m2
4.26
14.6
5.07
17.3
8.09
27.7
8.64
29.6
8.81
30.2
The following was observed when driving a 1.7in2 Green lamp.
VDD=
VIN (V)
1.8
2.0
3.0
4.0
5.0
IIN (mA)
22.1
20.5
17.3
13.7
11.7
VCS (V)
76.3
79.8
89.0
92.0
93.5
fEL (Hz)
250
250
250
250
250
Brightness
ft-lm
cd/m2
4.91
16.8
5.76
19.7
7.25
24.8
7.49
25.6
7.54
25.8
The above circuit may need to be optimized further based on specification of the lamp used.
©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
2
11/27/01rev.4
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 • FAX: (408) 222-4895
www.supertex.com
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