AAT3672 Datasheet, PDF (2/27 Pages) Skyworks Solutions Inc. – 1.6A Dynamic Battery Charger and Power Manager

DATA SHEET
AAT3672
1.6A Dynamic Battery Charger and Power Manager
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
EP
Name
ADPSET
ADP
STAT1
GND
STAT2
EN2
EN
EN1
ENO
ENBAT
CHRADP
TERM
TS
BAT
OUT
CT
EP
Type
I
I
O
I/O
O
I
I
I
I
I
I
I
I
I/O
O
I
I/O
Function
Connect a resistor from this pin to GND set the ADP fast charge constant current. The programmed
constant current level should be less than the ADP current limit set by ADPLIM specification (I_{LIM_ADP}).
Adapter input, source of system load and battery charging. Connect a 1μF (minimum) ceramic ca-
pacitor as close as possible between ADP and GND.
This open-drain MOSFET device is for charger status reporting. If used for status indication display,
connect an LED Cathode to this node with a series ballast resistor. Connect the LED anode to OUT or
ADP.
Common ground connection.
AAT3672-1/-2: This open-drain MOSFET device is for charger status reporting. If used for status
indication display, connect an LED cathode to this node with a series ballast resistor. Connect the LED
anode to OUT or ADP.
AAT3672-3: The EN2 pin (internal pull-down) is used together with the EN1 pin; see Table 2 in the
"Functional Description" section of this datasheet.
AAT3672-1/-2: Input enable (internal pull-down). High to enable the ADP switch and battery charg-
ing path; low or floating to disable the ADP switch and battery charging function. See Table 1 in the
"Functional Description" section of this datasheet.
AAT3672-3: This EN1 pin (internal pull-down) is used together with the EN2 pin; see Table 2 in the
"Functional Description" section of this datasheet.
Enable Input power to OUT, the dynamic power path from the ADP input to the system load. Active
high input (internal pull down).
Battery load switch enable, active high. Battery load switch control the power path between the bat-
tery cell and OUT (internal pull down).
Adaptor mode charge reduction voltage threshold programming pin. The ADP charge reduction
threshold may be adjusted from the default value by placing a voltage divider between this pin to
VADP and GND to this pin.
Connect a resistor between this pin and GND to program the charge termination current threshold.
The charge termination current level can be disabled by connecting this pin to a logic high level.
Battery temperature sensing input. For typical applications, connect a 10kΩ resistor from ADP to this
pin and a 10kΩ NTC thermistor located inside the battery pack under charge to this pin and GND to
sense battery over temperature conditions during the charge cycle. To disable the TS function, con-
nect with a 10kΩ resistor between this pin and GND.
Battery pack (+) connection. For best operation, a 1μF (minimum) ceramic capacitor should be
placed as close as possible between BAT and GND.
System dynamic power output supplied from the ADP input, BAT or both. Connect a 10μF capacitor
between this pin and GND for best system stability. If the system load circuit contains a reasonable
bulk capacitance, the output capacitor value may be reduced.
Battery charge timer input pin, connect a capacitor on this pin to set the ADP charge timers. Typi-
cally, a 0.1μF ceramic capacitor is connected between this pin and GND. To disable the timer circuit
function, connect this pin directly to GND.
Exposed paddle (package bottom). Connect to GND as closely to the device as possible.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
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201880B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012