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ACT2802C Datasheet(PDF) 14 Page - Active-Semi, Inc

No. de pieza ACT2802C
Descripción Electrónicos  5V/2.5A Backup Battery Pack Manager
PDF  25 Pages
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Fabricante Electrónico  ACTIVE-SEMI [Active-Semi, Inc]
Página de inicio  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT2802C Datasheet(HTML) 14 Page - Active-Semi, Inc

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Rev 7, 15-Jul-16
Innovative PowerTM
- 14 -
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
Input current limit at various resistor curve is shown
in Figure 8.
The ILIM pin voltage is proportional to input current
until input current is limited, as shown in Figure 9.
Battery Fast Charge Current
Battery fast charge current is set by a resistor
connected from ICST pin to AGND as shown in
Figure 10. Figure 11 gives out different fast charge
current with various RICST. The battery fast charge
current is estimated as the following equation:
Boost Output Constant Current
Boost output current is set by a resistor connected
from IOST pin to AGND as shown in Figure 12. The
boost output current is estimated as the following
equation:
Figure 13 gives out boost output current with
various RIOST.
The IOST pin voltage is proportional to output
current until output current is limited, as shown in
Figure 14.
Figure 7.
Input current limit setting circuit
Figure 8.
Input current limit setting
3.5
2.0
1.5
1.0
0.5
2.5
3.0
RILIM (kΩ)
0.6
1.0
1.4
1.8
2.2
2.6
3.0
VIN = 5.0V
Input current (A)
0
0.4
0.8
2.0
2.4
2.8
3.2
1.2
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
Figure 9.
VILIM VS. input current
VIN = 5.0V
RILIM=750Ω
(4)
)
m
(
Rcs
)
k
(
R
)
A
(
25
.
1
)
A
(
Ic
ICST
Figure 10.
Battery fast charge current setting
Figure 11.
Battery fast charge current setting
RICST (kΩ)
0
10
20
30
40
50
60
3.0
2.5
2.0
1.5
1.0
0.5
0
VIN = 5.0V
Vbat=3.7V
)
(m
s
Rc
)
(k
R
)
A
(
3
2
(A)
I
OST
I
IOST
(5)
Figure 12.
Boost output current setting circuit
Figure 13.
Boost output current setting
2.5
2.0
1.5
1.0
0.5
0
3.0
RIOST (kΩ)
0
20
40
60
80
100
VBAT = 3.7V
CVout=4.5V
Figure 14.
VIOST VS. output current
750
600
450
300
150
0
Output current(A)
0
0.4
0.8
1.2
1.6
2.0
2.4
VBAT = 3.7V
RIOST=91kΩ



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