ACT2813/ACT2813C
Rev 2, 19-May-15
5V/2.4A Power Bank Solution
FEATURES
•
Dedicated Single Chip Solution for Mobile Power
With Minimal Component Count
•
2.4A Continuous Output Current in Boost Mode
•
2.4A Switching Charger Current
•
96% Boost Efficiency
(Vbat=4.1V)
APPLICATIONS
•
•
•
•
Power Bank
Mobile Power
Backup Battery Pack
Standalone Battery Charger with USB Output
•
Adaptive to 10mA-2400mA Input Sources
•
Battery Disconnection at Output Short
•
<10µA Low Battery Leakage Current at HZ
•
•
•
•
•
•
•
•
•
•
•
•
•
Mode During Storage
Boost Auto Turn-off at No Load and Push
Button Turn-on
Battery Over Current, Over Voltage, Over
Temperature and Short Circuit Protections
Boost Auto Startup with Load Detection
Prioritized Power Path from Input to Output
5V+/-100mV Output Voltage in Boost Mode
1.1MHz/0.55MHz Switching Frequencies
2.2uH Inductor and Low Profile Ceramic
Capacitor
4 LEDs Battery Level and Status Indication
Battery Impedance Compensation
Full Cycle of Battery Charge Management
Preconditioning, Fast Charge, Top off and End
of Charge
Charge Current Foldback at 110°C Die
Temperature
IC Over Temperature Protection at 160°C
FCQFN 4x4-20 Package
GENERAL DESCRIPTION
ACT2813/ACT2813C is a space-saving and high-
performance low-profile single-chip solution for
backup battery pack and standalone battery
charger. ACT2813/ACT2813C integrates all the
functions that a backup battery pack needs,
including switching charger, boost converter and
LED indication.
ACT2813/ACT2813C operates at 1.1MHz for
switching charger and 0.55MHz for boost converter
allowing tiny external inductor and capacitors.
ACT2813/ACT2813C provides a direct power path
from input to output while providing power to
switching charger. Output has higher priority than
battery charger if the input current limit is reached.
ACT2813/ACT2813C charges battery with full cycle
of preconditioning, fast charge with constant current
and constant voltage until end of charge. The
battery charger is thermally regulated at
110°C
with
charge current foldback.
ACT2813/ACT2813C boost converter steps battery
voltage up to 5V. Boost converter features high
efficiency, constant current regulation, short circuit
protection and over voltage protection.
ACT2813/ACT2813C provides 3.5mA constant
currents to drive 4 LEDs to indicate battery level
and charge status. Battery impedance is
compensated for battery level indication.
Boost CC/CV Profile
Boost Output Voltage (V)
5.5
V
BAT
=3.2V
5.0
V
BAT
=3.7V
4.5
4.0
V
BAT
=4.1V
3.5
3.0
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
Output Current (A)
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Copyright © 2015 Active-Semi, Inc.
ACT2813/ACT2813C
ORDERING INFORMATION
PART NUMBER
ACT2813QY-T
ACT2813QY-T0435
ACT2813CQY-T
ACT2813CQY-T0435
OUTPUT
5V/2.4A
5V/2.4A
5V/2.4A
5V/2.4A
CHARGE
CURRENT
2.4A
2.4A
2.4A
2.4A
BATTERY
VOLTAGE
4.2V
4.35V
4.2V
4.35V
FLASHLIGHT
No
No
Yes
Yes
TH PIN
Yes
Yes
No
No
PACKAGE
FCQFN 4x4-20
FCQFN 4x4-20
FCQFN 4x4-20
FCQFN 4x4-20
Rev 2, 19-May-15
PIN CONFIGURATION
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ACT2813/ACT2813C
PIN DESCRIPTIONS
PIN
1
2
3
4
5
Rev 2, 19-May-15
NAME
LED1
ICST
IOST
CSP
VBAT/CSN
DESCRIPTION
Battery level indicator. An internal 3.5mA sink current limit is built in.
Fast charge current setting pin. Connect a resistor from this pin to AGND to set the
charge current. The current setting ranges from 1.0A-3.0A.
Output current setting. Connect a resistor from this pin to AGND to set output constant
current. The current setting ranges from 1.0A-3.0A.
Positive terminal of charge current sense input. Kevin sense is required with 10nF
ceramic capacitor right across CSP and CSN pins.
Battery input and negative terminal of charge current sense input. Connected to the
battery pack positive terminal to provide power in High-Z mode. Bypass to PGND with
a high quality ceramic capacitor placed as close to the IC as possible.
Power ground. PGND is connected to the source of low-side N-channel MOSFET and
the MOSFET’s gate driver. PGND must be connected to AGND externally through
ground plane.
Internal switch to output inductor terminal.
Output pin. Bypass to PGND with a high quality low ESR and ESL ceramic capacitor
placed as close to the IC as possible.
USB or AC adaptor input. When VIN is valid, charge and power path is enabled.
Analog ground. AGND must be connected to PGND externally through ground plane.
Drive external P-FET to protect output short circuit and leakage during shutdown. nPG
pin is pulled up to VOUT internally. nPG pin is pulled low if VOUT is in the range.
Push button input, connect a push button from this pin to AGND, internally pulled up
by a 3MΩ resistor to battery. PB starts up boost converter if HZ pin is grounded and
VIN is not present. When this pin is pushed for 30ms, LED1-4 indicators are enable for
5 seconds.
Boost/high-Z mode enable pin, internally pulled up by a 3MΩ resistor to battery. When
HZ pin is pulled ground, boost is enabled if VIN is not present.
TH: ACT2813
Temperature sensing input. Connect to battery thermistor terminal. If no use, put 10K
pulled down resistor.
FLD: ACT2813C
Open-drain flashlight driver. A internal switch can handle up to 50mA.
6
7, 8
9
10
11
12
PGND
SW
VOUT
VIN
AGND
nPG
13
PB
14
HZ
15
TH/FLD
16
17
18
19
20
21
BLVS
RIMC
LED4
LED3
LED2
EP
Battery level voltage shift. Connect a resistor from this pin to AGND to shift the battery
LED indication thresholds.
Battery impendence compensation input. Connect to a resistor from this pin to APNG
to program the battery impedance.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Battery level indicator. An internal 3.5mA sink current limit is built in.
Exposed pad. Must be soldered to ground on the PCB.
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ACT2813/ACT2813C
ABSOLUTE MAXIMUM RATINGS
PARAMETER
All the Pin to PGND and AGND
Junction to Ambient Thermal Resistance
Maximum Power Dissipation
Operating Ambient Temperature
Operating Junction Temperature
Storage Junction Temperature
Lead Temperature (Soldering 10 sec.)
Rev 2, 19-May-15
VALUE
-0.3 to 6.5
40
2.5
-40 to 85
-40 to 150
-40 to 150
300
UNIT
V
°C/W
W
°C
°C
°C
°C
: 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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ACT2813/ACT2813C
ELECTRICAL CHARACTERISTICS
(V
IN
= 5V, T
A
= 25°C, unless otherwise specified.)
Rev 2, 19-May-15
PARAMETER
Input Current Limit
Input Voltage Range
V
IN
Over Voltage Protection
Input Voltage Validation Time
Leakage Current from VOUT to VIN in Boost
Mode
Battery Discharge Current in High-Z Mode
TEST CONDITIONS
MIN
TYP
MAX
UNI
T
4.5
VIN rising, V
IN
_OVP
VIN_UVLO<VIN<VIN_OVP
3.0V<VBAT<4.2V, Ta=25℃
3.0V<VBAT<4.2V, Ta=25℃
5.5
6.0
32
0
7.5
5.5
6.5
V
V
ms
10
15
µA
µA
Power Switches
VIN-to-VOUT FET on Resistance
VOUT-to-SW FET on Resistance
SW-to-PGND FET on Resistance
60
45
45
mΩ
mΩ
mΩ
Buck Converter
Switching Frequency
High Side Switch Peak Current Limit
Minimum On-time
Over Temperature Protection (OTP)
OTP Hysteresis
OTP rising
OTP falling
-15%
4.5
1.1
6
100
160
35
+15%
MHz
A
ns
℃
℃
Charge Mode
Charge Current Setting Range
Charge Current Setting (I
CHRG
)
Thermal Regulation Temperature
ACT2813/ACT2813C
End of Charge (EOC) Voltage
ACT2813-T0435/ACT2813C-T0435
Battery Over Voltage Threshold
Battery Over Voltage Threshold Hysteresis
Fast Charge Current
Precondition Charge Current
Precondition Voltage Threshold
Precondition Voltage Threshold Hysteresis
VBAT rising
VBAT falling
VBAT=3.5V
2.4V≤VBAT≤2.8V, Percent of I
CHRG
VBAT rising
-0.5%
4.35
4.6
200
I
CHRG
10
2.8
130
+0.5%
V
V
mV
A
%
V
mV
-0.5%
Rcs=25mΩ, R
ICST
=20kΩ—60kΩ
Rcs=25mΩ, R
ICST
=48kΩ
1.0
-10%
2.4
110
4.2
+0.5%
3.0
+10%
A
A
℃
V
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