ACT2803
Rev 1, May-12-2016
5V/2.4A Dual Cell Battery Power Manager
FEATURES
Dedicated Single-chip Integrated Dual Cell
Battery Management
Dual Cell Battery Charger with Cell Balancing
Management
Auto Detection support USB BC1.2, Chinese
YD/T 1591-2009, Apple, and Samsung Devices
Meet EN55022 Class B Radiated EMI Standard
Pass MFi Test
4.5V-5.5V Input Voltage and 2.75A Input Current
Limit
2.4A Output Current with CC Regulation
5.07V+/-1% Output with Prioritized Power Path
from Input to Output
4.20V/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 2.4A
Output for Full Battery Range
4 Modes of LED Operation
Capability to Charge Wearable Devices
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
Dual Cell Boost Battery Charger
Bluetooth Speaker
Standalone Battery Charger with USB Output
GENERAL DESCRIPTION
ACT2803 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, ACT2803 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.
ACT2803 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 .
ACT2803 is available in a thermally enhanced
5mmx5mm QFN55-40 package with exposed pad.
Buck Output CC/CV
6.0
Buck Output Voltage (V)
5.0
V
BAT
= 6.0V
4.0
3.0
V
BAT
= 8.2V
2.0
1.0
0
0
500
1000
1500
2000
2500
3000
Output Current (mA)
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Copyright © 2016 Active-Semi, Inc.
ACT2803
Rev 1, May-12-2016
ORDERING INFORMATION
PART NUMBER
ACT2803QJ-T
ACT2803QJ-T0435
BATTERY CELL VOLTAGE
4.20V
4.35V
JUNCTION TEMPERATURE
-40˚C to 150˚C
-40˚C to 150˚C
PACKAGE
QFN55-40
QFN55-40
PINS
40
40
PIN CONFIGURATION
TOP VIEW
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Copyright © 2016 Active-Semi, Inc.
ACT2803
Rev 1, May-12-2016
PIN DESCRIPTIONS
PIN
1
2,3
4, 5
6, 7
8
9
10
11
12
13
14,15
16,17
18
19
20
21
22
NAME
CSN
CSP
VOUT
VIN
OVGATE
OVSENS
SCL
SDA
PGND
HSB
SW
BAT
BATS
BATP
BATC
CBD
BATN
Output current sense negative input.
Output current sense positive input.
Power Output Pin.
USB or AC Adapter input.
DESCRIPTION
Output to drive optional external NMOS protect IC from over voltage.
USB or AC Adapter input sense.
I2C clock input.
I2C data input.
Power ground. Directly connect this pin to IC thermal PAD and connect 22uF high quality
capacitors from BAT to PGND on the same layer with IC.
High side bias pin. Connect a 47nF ceramic capacitor from HSB to SW.
Internal switch connected to a terminal of the output inductor.
BAT connection. Connect it to battery current sense positive terminal. Bypass to PGND with high
quality ceramic capacitors placed as close to the IC as possible.
Battery charge current sense input. Connect to charge sense resistor positive terminal with
Kevin sense.
Connect to charge sense resistor negative terminal and battery positive terminal.
Battery central point connection. Connect to dual battery cell common terminal.
Cell balancing discharge. Connect to a discharge resistor from this pin to battery common
terminal.
Battery negative terminal.
Fast charge current setting pin. Connect a resistor from this pin to AGND to set the charging
current. The current setting ranges from 0.5A-1.8A. The voltage at this pin reflects the charge
current and discharge current in charge mode and discharge mode, respectively.
Temperature sensing input. Connect to a battery thermistor terminal.
+5V
Bias output. Connect a 1.0uF to this pin. This pin supplies up to 50mA output current. The
bias turns on in charge mode and discharge mode. Internal register bit can shut down the bias.
Bias turns off in HZ mode.
Logic ground output. Connect this pin to the exposed PGND pad on same layer with IC.
Push button input. When this pin is pushed for more than 40ms, LED1-4 indicators are enabled
for 5 seconds.
Battery level indicator.
23
ICST
24
25
26
27
28
TH
VREG
AGND
PB
LED1
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ACT2803
Rev 1, May-12-2016
PIN DESCRIPTIONS
PIN
29
30
31
32
33
34
35
36
37
NAME
LED2
LED3
LED4
LEDLS1
LEDLS2
LEDLS3
LEDLS4
PT
RIMC
Battery level indicator.
Battery level indicator.
Battery level indicator.
DESCRIPTION
LED1 threshold level shift. Connect a resistor from the pin to AGND to shift LED1 threshold.
LED2 threshold level shift. Connect a resistor from the pin to AGND to shift LED2 threshold.
LED3 threshold level shift. Connect a resistor from the pin to AGND to shift LED3 threshold.
LED4 threshold level shift. Connect a resistor from the pin to AGND to shift LED4 threshold.
LED indication mode input. The 5 modes of LED indication patterns are set by a voltage at this
pin. Connect a resistor at the pin to set the voltage and an LED indication pattern .
RIMC Battery impedance compensation input. Connect a resistor to this pin to offset the LED
thresholds in charge mode and discharge mode.
The hysteresis window setting input. Connect a resistor at the pin to set the hysteresis windows
for LED1, 2, 3, 4. In charge mode, LED thresholds moves up and in discharge mode, LED
thresholds moves down.
Output port auto detection input. Connected to portable device D-.
Output port auto detection input. Connected to portable device D+.
Exposed pad. Must be soldered to ground plane layer(s) on the PCB for best electrical and
thermal conductivity.
38
39
40
41
HYST
DM
DP
PGND
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Copyright © 2016 Active-Semi, Inc.
ACT2803
Rev 1, May-12-2016
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 CSN, 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 (θ
JA
)
Operating Junction Temperature (T
J
)
Operating Temperature Range (T
A
)
Store Temperature
Lead Temperature (Soldering, 10 sec)
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.
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