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PDF ACT2804 Data sheet ( Hoja de datos )
| Número de pieza | ACT2804 | |
| Descripción | 5V/3.4A Dual Cell Backup Battery Power Manager | |
| Fabricantes | Active-Semi | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ACT2804 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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ACT2804
Rev 2, Feb-04-2016
5V/3.4A Dual Cell Backup Battery Power Manager
FEATURES
Dedicated Single-chip Integrated Battery Power
Manager
Dual Cell Battery Charger with Cell Balancing
Management
Auto Detection support USB BC1.2, Chinese
YD/T 1591-2009, Apple 2.4A, and Samsung
Devices
Passed Apple MFi Test
4.5V-5.5V Input Voltage with 3.4A Input Current
Limit
2.4A+1.0A Dual Outputs with CC Regulation
5.07V+/-1% Output with Prioritized Power Path
from Input to Output
4.2V/4.35V +/- 0.5% Battery Charge Voltage
Accuracy of Each Cell
Output Plug-in Detection Wakeup and No Load
Detection Sleep Mode
Optimized Power Path and Battery Charge
Control
<10uA Low Battery Drainage Current
I2C Port for Optimal System Performance and
Status Reporting
Configurable Charge, Discharge and HZ modes
>92% Charge and Discharge Efficiency at 3.4A
Output for Full Battery Range
4 Modes of LED Operation
Preconditioning for Deeply Depleted Battery
Weak Input Sources Accommodation
Safety:
Input Over-voltage Protection
Nearly Zero Power Short Circuit Protection
Output Over-voltage Protection
Battery Over-charge and Over-discharge
Protections
Charge/Discharge Thermal Regulation
TQFN5x5-40 Package
APPLICATIONS
Backup Battery Pack
Power Bank
Mobile Power
Standalone Battery Charger with USB Output
GENERAL DESCRIPTION
ACT2804 is a space-saving and dedicated single-
chip solution for dual-cell battery charge and
discharge. It takes 5V USB input source to charge a
dual cell battery with boost configuration in three
phases: preconditioning, constant current, and
constant voltage. Charge is terminated when the
current reaches 10% of the fast charge rate. The
battery charger is thermally regulated at 110˚C with
charge current foldback.
If input 5V is not present, ACT2804 discharge a
dual cell battery with buck configuration to provide
5.07V+/-1% to output ports. There is a power path
from input to output. The cycle-by-cycle peak
current mode control, constant current regulation,
short circuit protection and over voltage protection
maximize safe operation.
ACT2804 provides 4 LED drive pins for battery
capacity level and charge status indication to
indicate 25%, 50%, 75%, and 75% above battery
level with battery impedance compensation. The
LED indication patterns are programmable .
ACT2804 is available in a thermally enhanced
5mmx5mm QFN55-40 package with exposed pad.
VIN
4.5V-5.5V
VOUT2
5.07V/2.4A
VOUT1
5.07V/1A
22uF
25mΩ
25mΩ
4.7uH
22uF
47nF
22uF
1uF
LED4 LED3 LED2 LED1 VREG
VIN BAT
CSN2
BATS
CSP
BATP
CSN1
VOUT
ACT2804
BATC
SW
PGND
CBD
HSB
BATN
RIMC ICS T TH PB AGND
22uF
22uF
25mΩ
510Ω
47Ω
510Ω
540k 8k 10k
Innovative PowerTM
-1-
Buck Output CC/CV
6.0
5.0
VBAT = 6.0V
4.0
3.0
1A Output
2.0
2.4A Output VBAT = 8.2V
1.0
0
0 500 1000 1500 2000 2500 3000
Output Current (mA)
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
1 page  
ABSOLUTE MAXIMUM RATINGS
PARAMETER
LEDLS1, LEDLS2, LEDLS3, LEDLS4, RIMC, HYST and PT to GND
LED1, LED2, LED3 and LED4 to GND
PB, DM, DP, TH, SCL, SDA and ICST to GND
OVSENS to GND
OVGATE to GND
VIN, VOUT and VREG to GND
CSP to CSN2, CSP to CSN1, CSP to VOUT
BAT to BATS, BATS to BATP
BATC to BATN
BAT to BATC
BATN to GND
CBD to BAT
BATN to CBD
SW to PGND
HSB to SW
Junction to Ambient Thermal Resistance (θJA)
Operating Junction Temperature (TJ)
Operating Temperature Range (TA)
Store Temperature
Lead Temperature (Soldering, 10 sec)
ACT2804
Rev 2, Feb-04-2016
VALUE
-0.3 to +6
-0.3 to +6
-0.3 to +6
-0.3 to +16
-0.3 to +12
-0.3 to +6
-0.3 to +0.3
-0.3 to +0.3
-0.3 to +6
-0.3 to +6
-0.3 to +0.3
-6 to +0.3
-6 to +0.3
-0.3 to +12
-0.3 to +6
40
-40 to 150
-40 to 85
-55 to 150
300
UNIT
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
℃/W
℃
℃
℃
℃
Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long
periods may affect device reliability.
Innovative PowerTM
- 5 - www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
5 Page 
APPLICATIONS INFORMATION
Fast Charge Current Control
The block diagram in Figure 2 shows how battery
current is sensed for charge current control.
Input
Iin
Cin
RICST
VIN
ICST
VOUT
Io
ACT2804
SW
BAT
CBD
L
RCS
25m
RCBD
47
Output
Cout1
Battery1
Battery2
ACT2804
Rev 2, Feb-04-2016
LEDLS3, LEDLS4 to APNG respectively, as shows
in Figure3.
RHY ST
RIMC RLS1 RLS2 RLS3 RLS4
ACT2804
Figure 2: Battery current monitoring
A small percentage of charge current is sensed and
sinked into a resistor connected at pin ICST. In
charge mode, this would allow user to set fast
charge current based on the following equation.
Ic( A)
1000
5* RCS (m) * RICST (k)
(1)
For example, IC=1A with RCS=25mΩ and
RICST=8kΩ.
Recommended RICST is shown in following table:
IC (A)
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
RICST
RCS=25mΩ
10
RCS=50mΩ
5
8.89 4.44
84
7.27 3.64
6.67 3.33
6.15 3.08
5.71 2.86
5.33 2.67
Units
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
During discharge mode, inputs of battery current
sense amp are flipped to sense discharge current,
and voltage level at pin ICST can be used (by the
system) to monitor the magnitude of discharge
current based on the following equation.
VICST
I RDISCHARGE
ICST
20k
(2)
For example: VICST=0.4V with I_DISCHARGE=1A,
and RICST=8kΩ.
LED Threshold Setting
LED1, LED2, LED3 and LED4 thresholds are
adjustable with external resistors RLS1, RLS2, RLS3,
and RLS4 connected from LEDLS1, LEDLS2,
Figure 3: LED threshold setting
The following equation shows how the external
resistor shifts the LED thresholds. The range of
LED1‐LED4 indicator threshold shift from 5.5V‐
8.8V.
VLEDX (V )
5.5V
108k
R LSx (k)
(3)
RLSx
(kΩ)
40
43.2
47
49.1
57
60
67.5
VLEDx
(V)
8.2
8
7.798
7.7
7.395
7.3
7.1
RLSx
(kΩ)
72
90
108
120
135
180
270
VLEDx
(V)
7
6.7
6.5
6.4
6.3
6.1
5.9
VLED Example is given by the below table:
LED Hysteresis Window Setting
The adjustable LED voltage thresholds are set for
HZ mode. In charge mode, the measured battery
voltage is higher than in HZ mode, while in
discharge mode, the measured battery voltage is
lower. To have relatively better “fuel gauge” for
battery, a programmable hysteresis window will
help. When the battery voltage goes up (in charge
mode), the thresholds become higher, when the
battery voltage goes down, lower thresholds are
applied.
ACT2804 provide HYST pin to set hysteresis
window for each indication level as shows in Figure
Innovative PowerTM
- 11 -
www.active-semi.com
Copyright © 2016 Active-Semi, Inc.
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ACT2804.PDF ] | |
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