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SS8028 Datasheet(PDF) 8 Page - Silicon Standard Corp.

Part # SS8028
Description  Micro-Power Step-up DC/DC Converter
PDF  9 Pages
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Manufacturer  SSC [Silicon Standard Corp.]
Direct Link  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS8028 Datasheet(HTML) 8 Page - Silicon Standard Corp.

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SS8028
minimize the output ripple voltage, but proper
selection of the inductor and the output capacitor also
plays a big role. If a larger inductance value or a
smaller capacitance value is used, the output ripple
voltage will increase because the capacitor will be
slightly overcharged each burst cycle. To reduce the
output ripple, increase the output capacitance value,
or add a 10pF feed-forward capacitor in the feedback
network of the SS8028 (see the circuits in the
Typical Applications section). To add this small
inexpensive 10pF capacitor will greatly reduce the
output voltage ripple.
TYPICAL APPLICATION CIRCUITS
Boost Converter
SEPIC Converter
VCC
SW
SHDN
FB
GND
G5111
C2
22µF
C1
4.7µF
R2
120k
2.5V to 4.2V
R1
390k
5V
50mA
D1
VCC
SW
SHDN
FB
GND
C2
22µF
C1
4.7µF
R2
270k
V
2.5V to 4.2V
R1
470k
3.3V
60mA
1
L2
10µH
D1
VCC
SW
SHDN
FB
GND
C2
22µF
C1
4.7µF
V
IN
5V
50mA
D1
GND
C2
22µF
C1
4.7µF
IN
3.3V
60mA
L1:MURATA LQH3C4R7M24
D1:MOTOROLA MBR0520
L1,L2:MURATA LQH3C100K24
D1:MOTOROLA MBR0520
L2
10µH
D1
C3
1uF
L1
10uH
L1
4.7uH
R1
30_1%
R2
120k_1%
Dimming Ratio>50:1
Drive 2~4 White LEDs
R3
308k_1%
R4
660k_1%
VBIAS(+3.3V)
PWM Dim
PWM Dimming Control
VH=3.3V
VL=0V
Freq=160~240Hz
D2(Optional)
18V
C2
1µF
D1
MBR0520
L1
10µH/0.5A
SW
VCC
SHDN
FB
GND
VBAT
2.5V~5.5V
C1
4.7µF
ON/OFF Control
R1
30_1%
R2
120k_1%
Dimming Ratio>50:1
Drive 2~4 White LEDs
R3
308k_1%
R4
660k_1%
VBIAS(+3.3V)
PWM Dim
PWM Dimming Control
VH=3.3V
VL=0V
Freq=160~240Hz
D2(Optional)
18V
C2
1µF
D1
MBR0520
L1
10µH/0.5A
SW
VCC
SS8028
SHDN
FB
GND
VBAT
2.5V~5.5V
C1
4.7µF
ON/OFF Control
White LED Driver
Rev.2.02 12/06/2003



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