HV9906 Supertex Inc, HV9906 Datasheet - Page 10

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

Application Information -
Power Factor Corrected Average Current LED Lamp Power Supply
This power factor corrected circuit provides a constant average
current output to power LED lamps.
12V (6 cell) Lead-Acid Battery Charger
This floating battery charger circuit will charge a 6 cell 12V lead-
acid battery to a float voltage of 13.8V and provides a 1A charging
current limit for a severely discharged or shorted battery.
80VAC
to
135VAC
Supertex, Inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: [phone] FAX: [phone] www.supertex.com
D1
D4 D3
C1
D2
R1
R2
C2
12VDC to 400VDC
or
65VAC to 280VAC
D5
R3
C3
C4
Von
Vdd
AGND
+Vin
U1
HV9906
continued
1N4007
GATE
PGND
D1
D4
0.1uF
400V
C1
100k
NS
PS
D2
D3
R1
8M
R1
R4
10uF
R6
C5
R5
C2
C6
Von
Vdd
AGND
C7
HV9906
10
R7
+Vin
U1
PGND
GATE
C8
R8
NS
MURS120T3
PS
It is intended to meet the following specifications:
When the discharged battery terminal voltage is at 12V, the
charging current is 130mA. The charging current decreases as the
battery charges and the terminal voltage rises. When the
maximum float voltage of 13.8V is reached the current into the
battery will be essentially zero.
R10
D5
L1
D6
L1
C9
Q1
C3
M1
MURS120T3
MURS120T3
M1
Input Voltage
LED String Forward Voltage
Power Factor
THD
P
D7
D6
D8
D7
L2
225k
150k
R3
R4
L2
Negative Voltage
R9
500
R5
13.3k
R6
R7
0.5
LED-5
Row 1
LED-1
Row 1
LED-2
Row 1
+
-
20V
80VAC to 135VAC
>0.95
<15%
10W
12V
Lead-Acid
Battery
LED-1
Row 2
LED-2
Row 2
LED-5
Row 2
HV9906
LED-1
Row 3
LED-2
Row 3
LED-5
Row 3
07/23/02