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ACT2802C Datenblatt(PDF) 13 Page - Active-Semi, Inc

Teilenummer ACT2802C
Bauteilbeschribung  5V/2.5A Backup Battery Pack Manager
PDF  25 Pages
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Hersteller  ACTIVE-SEMI [Active-Semi, Inc]
Direct Link  http://www.active-semi.com
Logo ACTIVE-SEMI - Active-Semi, Inc

ACT2802C Datenblatt(HTML) 13 Page - Active-Semi, Inc

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Rev 7, 15-Jul-16
Innovative PowerTM
- 13 -
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
ACT2802/ACT2802B/ACT2802C
APPLICATIONS INFORMATION
Battery Charge Termination Voltage
Battery charge termination voltage is set by a
resistor Rbtv connected from BTV pin to AGND as
shown in Figure 5. The battery charge termination
voltage is estimated as the following equation:
Rbtv is selected based on the battery voltage rating.
1% accuracy resistor is recommended for Rbtv.
LED Status Indication
4 LEDs ON/OFF and flash show the charge status
and the remained capacity level as shown in the
table 2. The LED status is based on battery voltage
and operation modes. In charge mode, when a
battery is fully charged, flashing stops and all the 4
LEDs are solid on.
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 6. The following
equation shows the LED4 voltage threshold:
As long as LED4 is set, the other 3 LED thresholds
is fixed as shown in the table 3:
Table 3: 4 LED Voltage Thresholds
Input Current Limit
An external resistor is used to set the input current
limit connected from ILIM pin to AGND as shown in
Figure 7. Input current limit has built-in soft startup
and current foldback control loop. The input current
limit is estimated as the following equation:
Charge Mode
(Boost or HZ Mode)
ACT2802QL-T1028/
ACT2802CQL-T1028:PB time > 30ms
LED
LED1
LED2
LED3
LED4
LED1
LED2
LED3
LED4
VBAT<2.9V
Flash
Off
Off
Off
Off
Off
Off
Off
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
(2)
)
k
(
R
)
mA
(
01
.
0
)
V
(
5
.
3
)
V
(
V
BLVS
4
BATLED
(1)
)
V
(
10
4
R
)
V
(
1
.
4
)
V
(
V
6
btv
BAT
Figure 5.
Battery terminal voltage setting circuit
Figure 6.
Battery level voltage shift setting circuit
Table2: LED Indication
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
)
(k
R
(V)
4
.
2
(A)
I
ILIM
ILIM
(3)



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