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ACT2813 数据表(PDF) 12 Page - Active-Semi, Inc

部件名 ACT2813
功能描述  5V/2.4A Power Bank Solution
PDF  23 Pages
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制造商  ACTIVE-SEMI [Active-Semi, Inc]
网页  http://www.active-semi.com
标志 ACTIVE-SEMI - Active-Semi, Inc

ACT2813 数据表(HTML) 12 Page - Active-Semi, Inc

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Rev 2, 19-May-15
Innovative PowerTM
- 12 -
www.active-semi.com
Copyright © 2015 Active-Semi, Inc.
ACT2813/ACT2813C
APPLICATIONS INFORMATION
Battery level voltage shift (BLVS pin)
LED1-4 voltage thresholds are adjusted from HZ
mode during charging and discharging based on
the compensated impedance. Those thresholds are
programmed by a resistor connected from BLVS
pin to AGND as shown in Figure 5. The following
equation shows the LED4 voltage threshold:
As long as LED4 is set, all the other 3 LED
thresholds is fixed as shown in the table 2:
Table 2: 4 LED Voltage Thresholds
LED Status Indication
4 LEDs ON/OFF and flash show the charge status
and the remained capacity level as shown in the
table 3. The LED status is based on battery voltage
and operation modes. When battery voltage is low,
LED1 is flashing. In charge mode, when a battery is
fully charged, flashing stops and all the 4 LEDs are
solid on.
Fast Charge Current
Battery fast charge current is set by a resistor
connected from ICST pin to AGND as shown in
Figure 6.
The battery fast charge current is estimated as the
following equation:
Figure 7 gives out different fast charge current with
various RICST.
Charge Mode
PB time>30ms (Boost or HZ Mode)
LED
LED1
LED2
LED3
LED4
LED1
LED2
LED3
LED4
2.9V≤VBAT<LED1
Flash
Off
Off
Off
Flash
Off
Off
Off
LED1≤VBAT<LED2
On
Flash
Off
Off
On
Off
Off
Off
LED2≤VBAT<LED3
On
On
Flash
Off
On
On
Off
Off
LED3≤VBAT<LED4
On
On
On
Flash
On
On
On
Off
VBAT≥LED4
On
On
On
Flash
On
On
On
On
VBAT≥LED4 (End of Charge)
On
On
On
On
On
On
On
On
VBAT<2.9V
Flash
Off
Off
Off
Off
Off
Off
Off
Figure 5.
Battery level voltage shift setting circuit
Table 3: LED Indication
(2)
)
m
(
Rcs
)
k
(
R
)
A
(
25
.
1
)
A
(
Ic
ICST
Ω
Ω
×
=
3.0
2.5
2.0
1.5
1.0
0.5
0
Figure 7.
Battery fast charge current setting
RICST (kΩ)
0
10
20
30
40
50
60
VIN = 5.0V
Vbat=3.7V
Figure 6.
Battery fast charge current setting circuit
(1)
)
k
(
R
)
mA
(
01
.
0
)
V
(
5
.
3
)
V
(
V
BLVS
4
BATLED
Ω
×
+
=
RBLVS (ohm)
50K
60K
70K
80K
LED1
3.55V
3.65V
3.75V
3.85V
LED2
3.65V
3.75V
3.85V
3.95V
LED3
3.80V
3.90V
4.00V
4.10V
LED4
4.00V
4.10V
4.20V
4.30V



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