HV9904X 查看數據表（PDF） - Supertex Inc
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HV9904X Datasheet PDF : 5 Pages
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Application Information
Non-Isolated Constant Current Output PWM
Universal Input Constant Average Currrent LED Lamp Power Supply
10VDC to 400VDC
or
VAC to 265V
1N4007
D1 D2
D5
D6
MURS120T3 MURS120T3
L2
220uH
D4 D3
C3
0.01uF
D7
MURS120T3
C1
0.1uF
400V
L1
1mH
U1
Vdd +Vin GATE M1
NS
HV9904
C2
PS
1uF
AGND PGND
VN2460N8
or
IRFBC30AS
C4
0.1uF
10mA
1 to 8
LEDs
R1
250
HV9904
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
very high current ripple values are permissible then C4 may be
omitted. The following BOM provides a list of suggested
components.
Item Number
1
2
3
4
5
6
7
8
9
10
11
Total Part Count
Quantity
1
1
1
1
4
3
1
1
1
1
1
16
Reference
C1
C2
C3
C4
D1, D2, D3, D4
D5, D6, D7
L1
L2
M1
R1
U1
Value
0.1µF, 500V
1µF, 15V
0.01µF, 500V
0.1µF,25V
1N4007
MURS120T3
DO1608C-105
DO1608C-224
VN2460N8
250Ω
HV9904LG
Manufacturer
Vishay
Vishay
Vishay
Vishay
On Semiconductor
On Semiconductor
Coilcraft
Coilcraft
Supertex
Supertex
Prepare by Telecom Group
4
Rev. D
3/29/2002
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 FAX: (408) 222-4895 www.supertex.com
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