ACT2801 Product Brief 06_Nov_2013 - Active-Semi

ACT2801
Rev 0, 06-Nov-13
Product Brief
5V/1.5A Backup Battery Pack Manager
FEATURES
 Dedicated Single Chip Solution for Mobile

APPLICATIONS
Power With Minimal Component Count
5V/1.5A Constant Output Current in Boost
Mode
1.5A Switching Charger
Programmable 4.1V to 4.35V Battery Voltage
95% Boost Efficiency (Vbat=4.1V)







 Adaptive to 10mA-2400mA Input Sources
 Battery Disconnection at Output Short
 <10µA Low Battery Leakage Current at HZ













Backup Battery Pack
Power Bank
Mobile Power
Standalone Battery Charger with USB Output
GENERAL DESCRIPTION
ACT2801 is a space-saving and high-performance
low-profile single-chip solution for backup battery
pack and standalone battery charger. ACT2801
integrates all the functions that a backup battery
pack needs, including switching charger, boost
converter and LED indication.
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
Up to 2.0A Input Current Limit with Prioritized
Power Path to Output
5V+/-100mV Output Voltage in Boost Mode
1.1MHz/0.55MHz Boost Switching Frequencies
2.2uH SMD Inductor and Low Profile Ceramic
Capacitors
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
QFN4x4-24 Package
ACT2801 operates at 2.2MHz/1.1MHz for switching
charger and 1.1MHz/0.55MHz for boost converter
allowing tiny external inductor and capacitors.
ACT2801 provides a direct power path from input to
output with programmable current limit while
providing power to switching charger. Output has
higher priority than battery charger if the
programmed input current limit is reached.
ACT2801 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.
ACT2801 boost converter steps battery voltage up
to 5V. Boost converter features high efficiency,
constant current regulation, short circuit protection
and over voltage protection.
ACT2801 provides 3.5mA constant currents to drive
4 LEDs to indicate battery level and charge status.
Boost CC/CV Curve
Output Voltage (V)
5.5
VBAT =3.7V
5.0
VBAT =3.2V
4.5
4.0
VBAT =4.1V
3.5
3.0
0
200
400
600
800
1000
1200
1400
Output Current (mA)
Innovative PowerTM
ActiveSwitcherTM is a trademark of Active-Semi.
-1-
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.
ACT2801
Rev 0, 06-Nov-13
Product Brief
ORDERING INFORMATION
PART NUMBER
BOOST SWITCH
FREQUENCY
OUTPUT
CHARGE
CURRENT
PACKAGE
PACKING
ACT2801QL-T
1.1MHz
5V/1.5A
1.5A
QFN44-24
TAPE & REEL,
3KU/REEL
ACT2801QL-T0550
0.55MHz
5V/1.5A
1.5A
QFN44-24
TAPE & REEL,
3KU/REEL
PIN CONFIGURATION
TOP VIEW
24
23
22
21
20
19
HZ
PB
1
18
2
17
AGND
nPG
ILIM
VIN
3
16
4
15
5
14
EP
6
7
8
9
10
13
11
LED1
BTV
ICST
IOST
CSN
CSP
12
QFN44-24
Innovative PowerTM
ActiveSwitcherTM is a trademark of Active-Semi.
-2-
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.
ACT2801
Rev 0, 06-Nov-13
Product Brief
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
HZ
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.
2
PB
Push button input, connect a push button from this pin to AGND, internally pulled up
by a 3MΩ resistor to battery. When this pin is pushed for 100ms, LED1-4 indicators
are enable for 5 seconds. PB starts up boost converter if HZ pin is grounded and VIN
is not present.
3
AGND
4
nPG
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.
5
ILIM
Input current limit setting pin. Connect a resistor from this pin to AGND to set the input
current limit. The current setting ranges from 0.5A-2.0A.
6
VIN
USB or AC adaptor input. When VIN is valid, charge and power path is enabled.
7, 8
VOUT
9, 10
SW
11
PGND
Power ground. PGND is connected to the source of low-side N-channel MOSFET and
the MOSFET’s gate driver.
12
BAT
Battery 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.
13
CSP
Positive terminal of charge current sense input. Kevin sense is required with 10nF
ceramic capacitor right across CSP and CSN pins.
14
CSN
Negative terminal of charge current sense input.
15
IOST
Output current setting. Connect a resistor from this pin to AGND to set output constant
current. The current setting ranges from 0.75A-1.5A.
16
ICST
Fast charge current setting pin. Connect a resistor from this pin to AGND to set the
charge current. The current setting ranges from 0.75A-1.5A.
17
BTV
Battery termination voltage setting. Connect a resistor from this pin to AGND to
program battery charge termination voltage.
18
LED1
Battery level indicator. An internal 3.5mA sink current limit is built in.
19
LED2
Battery level indicator. An internal 3.5mA sink current limit is built in.
20
LED3
Battery level indicator. An internal 3.5mA sink current limit is built in.
21
LED4
Battery level indicator. An internal 3.5mA sink current limit is built in.
22
RIMC
Battery impendence compensation input. Connect to a resistor from this pin to APNG
to program the battery impedance.
23
BLVS
Battery level voltage shift. Connect a resistor from this pin to AGND to shift the battery
LED indication thresholds.
24
TH
Temperature sensing input. Connect to battery thermistor terminal. If no use, put 10K
pulled down resistor.
25
EP
Exposed pad. Must be soldered to ground on the PCB.
Logic ground.
Output pin. Bypass to PGND with a high quality low ESR and ESL ceramic capacitor
placed as close to the IC as possible.
Internal switch to output inductor terminal.
Innovative PowerTM
ActiveSwitcherTM is a trademark of Active-Semi.
-3-
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.
ACT2801
Rev 0, 06-Nov-13
Product Brief
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
UNIT
-0.3 to 6.5
V
Junction to Ambient Thermal Resistance
40
°C/W
Maximum Power Dissipation
2.5
W
Operating Ambient Temperature Range
-40 to 85
°C
Operating Junction Temperature
-40 to 150
°C
Storage Junction Temperature
-40 to 150
°C
300
°C
All the pin to PGND and AGND
Lead Temperature (Soldering 10 sec.)
: 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
ActiveSwitcherTM is a trademark of Active-Semi.
-4-
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.
ACT2801
Rev 0, 06-Nov-13
Product Brief
PACKAGE OUTLINE
QFN44-24 PACKAGE OUTLINE AND DIMENSIONS
SYMBOL
DIMENSION IN
MILLIMETERS
DIMENSION IN
INCHES
MIN
MAX
MIN
MAX
A
0.700
0.800
0.028
0.031
A1
0.000
0.050
0.000
0.002
A3
0.200 REF
0.008 REF
b
0.180
0.300
0.007
0.012
D
3.850
4.150
0.152
0.163
E
3.850
4.150
0.152
0.163
D2
2.500
2.800
0.098
0.110
E2
2.500
2.800
0.098
0.110
e
L
R
K
0.500 BSC
0.350
0.450
0.200 TYP
0.200
---
0.020 BSC
0.014
0.018
0.008 TYP
0.008
---
Active-Semi, Inc. reserves the right to modify the circuitry or specifications without notice. Users should evaluate each
product to make sure that it is suitable for their applications. Active-Semi products are not intended or authorized for use
as critical components in life-support devices or systems. Active-Semi, Inc. does not assume any liability arising out of
the use of any product or circuit described in this datasheet, nor does it convey any patent license.
Active-Semi and its logo are trademarks of Active-Semi, Inc. For more information on this and other products, contact
sales@active-semi.com or visit http://www.active-semi.com.
is a registered trademark of Active-Semi.
Innovative PowerTM
ActiveSwitcherTM is a trademark of Active-Semi.
-5-
www.active-semi.com
Copyright © 2013 Active-Semi, Inc.