AAT3670 データシートの表示（PDF） - Advanced Analogic Technologies
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AAT3670 Datasheet PDF : 31 Pages
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BatteryManagerTM
PRODUCT DATASHEET
AAT3670
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
15
16
17
18
19
20
21
22
23
24
EP
Name
USBSEL
OUT
BAT
ADP
VTS
TS
BATS
CHRADP
ADPLIM
USBLIM
ADPSET
USBSET
GND
TERM
EN
CT
STAT2
STAT1
N/C
USB
CHRUSB
ENBAT
Type
I
O
I/O
I
O
I
I
I/O
I
I
I
I
I/O
I
I
I
O
O
I
I/O
I
Function
Logic input. High for 100% USB charge current set by USBSET; low for 20% (constant cur-
rent charge mode) or 50% (trickle charge mode) charge current set by the USBSET resistor.
System load output; a capacitor with a minimum value of 10µF (including all capacitance on
the load of OUT) is required.
Battery pack input/output. For best operation, a 1µF ceramic capacitor should be placed
between BAT and GND.
AC adapter input, source of system load and battery charging. Minimum 1µF input capacitor.
Voltage reference for battery temperature sensing.
Battery temperature sensing input. Use an NTC resistor from TS pin to ground and a 1%
standard resistor that has equal resistance of the NTC at 25°C from VTS to TS for battery
temperature sensing. Tie TS pin to ground to disable the temperature sensing function.
Battery sense pin.
ADP voltage sensed charge reduction programmable pin. A resistor divider from ADP to this
pin and GND sets the charge reduction threshold. When this pin is open, the charge reduc-
tion threshold is 4.6V. If this pin is tied to the ADP pin, the charge reduction is disabled.
Connect a resistor to this pin to set the ADP input current limit (including load switch and
charger currents).
Connect a resistor to this pin to set the USB input current limit (including load switch and
charger currents).
Connect a resistor to this pin to set the ADP charge current (for trickle charge and constant
current charge). The CC current set by this pin should be less than the current limit set by
ADPLIM, otherwise the CC current will be limited by ADPLIM.
Connect a resistor to this pin to set the USB charge current (for trickle charge and constant
current charge). The CC current set by this pin should be less than the current limit set by
USBLIM, otherwise the CC current will be limited by USBLIM.
Common ground.
Connect a resistor to this pin to program the charge termination current threshold. No termi-
nation current setting when this pin is pulled up to a logic high level.
ADP/USB enable input. High or floating (internal pull-up) to enable ADP/USB switch and ADP/
USB battery charging; low to disable ADP/USB switch and ADP/USB battery charging.
Battery charge timer input pin. Connect a capacitor to this pin to set the ADP charge timers.
No time-out for USB charging. Timers are disabled when this pin is grounded. The timer is
suspended if the battery temperature is not within 0 to 50ºC or is in charge reduction (either
due to the supply voltage dropping or the device temperature rising) is activated. The timer
continues where it left off after the battery temperature returns to normal and the device is
out of the charge reduction loops.
Open drain charger status reporting.
Open drain charger status reporting.
No connection.
USB input, source of system load and battery charging when ADP is not available. Minimum
1µF input capacitor.
USB voltage sensed charge reduction programmable pin. A resistor divider from USB to this
pin and GND sets the charge reduction threshold. When this pin is open, the charge reduc-
tion threshold is 4.5V. If this pin is tied to the USB pin, charge reduction is disabled.
Battery load switch enable, active high.
Exposed paddle (bottom). Connect to ground as closely as possible to the device.
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3670.2008.04.1.5
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