HV9906 Supertex Inc, HV9906 Datasheet - Page 9

• Manufacturer Part Number: HV9906
• Description: Simple Off-Line/PFC & >9V DC/DC Switcher
• Manufacturer: Supertex Inc

Application Information
Universal Input Non-Isolated Constant 10mA Average Current LED Lamp Power Supply
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.
Universal Input Non-Isolated Constant 0.5A Average Current LED Lamp Power Supply
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.
12VDC to 400VDC
or
65VAC to 280VAC
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: [phone] FAX: [phone] www.supertex.com
12VDC to 400VDC
or
65VAC to 280VAC
1N4007
D1
0.047uF
D4 D3
400V
C1
100k
D2
R1
8M
R2
1uF
to
6.8uF
C2
1N4007
D1
D4 D3
0.1uF
400V
Von
Vdd
C1
AGND
100k
D2
R1
8M
R2
HV9906
+Vin
U1
1uF
to
6.8uF
PGND
GATE
C2
NS
PS
MURS160
56uH
0.033uF
D5
L1
C3
Von
Vdd
AGND
M1
IRFBC30AF
HV9906
9
MURS160
MURS160
+Vin
D6
U1
PGND
GATE
D7
MURS120T3
NS
PS
If current ripple is permissible then C4 may be omitted.
If current ripple is permissible then C4 may be omitted.
Optional
0.01uF
1mH
D5
15uH
L1
900k
300k
R3
R4
L2
C3
C4
M1
VN2460N8
MURS120T3
MURS120T3
+
-
100
R5
D6
Q1
LED-9
Row 1
LED-1
Row 1
20mA
D7
NPN Bipolar Transistor Array or Matched 2N2222
Optional
Q2
220uH
700k
200k
R3
R4
L2
C4
LED-1
Row 2
LED-9
Row 2
LED-10
Row 2
20mA
10mA
Q3
+
-
LED-1
Row 3
LED-9
Row 3
LED-10
Row 3
20mA
Negative Voltage
1 to 8
LEDs
250
R5
Q25
HV9906
LED-1
Row 25
LED-9
Row 25
LED-10
Row 25
20mA
07/23/02