HV9906LG Ver la hoja de datos (PDF) - Supertex Inc
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componentes Descripción
Fabricante
HV9906LG Datasheet PDF : 10 Pages
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Application Information
Universal Input Non-Isolated Constant 10mA Average Current LED Lamp Power Supply
12VDC to 400VDC
or
65VAC to 280VAC
1N4007
D1 D2
D4 D3
C1
0.1uF
400V
R1
8M
R2
100k
C2
1uF
to
6.8uF
D5
D6
MURS120T3 MURS120T3
L2
220uH
C3
0.01uF
L1
1mH
D7
MURS120T3
C4
Optional
-
+
10mA
1 to 8
LEDs
U1
+Vin GATE
M1
VN2460N8
R3
700k
Von
NS
HV9906
Vdd
PS
AGND PGND
R4
200k
R5
250
HV9906
This circuit provides a constant average current output, which may
be used to power LED lamps. The circuit maintains a constant
average current and the value of C4 capacitor controls the peak-to-
peak ripple, which decreases with increasing capacitor value.
If current ripple is permissible then C4 may be omitted.
Universal Input Non-Isolated Constant 0.5A Average Current LED Lamp Power Supply
12VDC to 400VDC
or
65VAC to 280VAC
1N4007
D1 D2
D5
MURS160
D6
MURS160
L2
15uH
D4 D3
C1
0.047uF
400V
R1
8M
R2
100k
C2
1uF
to
6.8uF
C3
0.033uF
L1
56uH
D7
MURS160
C4
Optional
U1
+Vin GATE
Von
NS
HV9906
Vdd
PS
AGND PGND
M1
IRFBC30AF
R3
900k
R4
300k
NPN Bipolar Transistor Array or Matched 2N2222
Q1
Q2
Q3
Q25
Negative Voltage
-
+
LED-1
Row 1
LED-1
Row 2
LED-1
Row 3
LED-1
Row 25
20mA
20mA
20mA
20mA
LED-9
Row 1
LED-9
Row 2
LED-9
Row 3
LED-9
Row 25
R5
LED-10
LED-10
LED-10
100
Row 2
Row 3
Row 25
This circuit provides 0.5A constant average current output to power
249 LEDs , each operating at 20mA to form a large LED lamp or
array. The circuit maintains a constant average current and the
value of C4 capacitor controls the peak-to-peak ripple, which
decreases with increasing capacitor value.
If current ripple is permissible then C4 may be omitted.
9
07/23/02
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com
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