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AAT3688IWP-4.2-T1 Datasheet

  • AAT3688IWP-4.2-T1

  • USB Port Lithium-Ion/Polymer Battery Charger

  • 527.69KB

  • ANALOGICTECH

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USB Port Lithium-Ion/Polymer Battery Charger
Pin Descriptions
Pin #
1
2
3
4
AAT3688
Name
USB
BAT
GND
CHR
Type
In
In/Out
Ground
In/Out
Function
USB power supply input.
Battery charging and sensing.
Ground connection.
Resistor divider to set USB voltage regulation for charge reduction mode.
Leave this pin open for default 4.5V USB regulation point. Tie to USB pin to
disable this function.
Enable pin. Logic high enables the IC.
Connect to 10k惟 NTC thermistor.
Status report to microcontroller via serial interface, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
Battery charge status indicator pin to drive an LED: active low, open-drain.
When USB is present, use this pin to toggle between USBH and USBL
charging levels.
Connect resistor here to set charge current for low-current USB port.
Connect resistor here to set charge current for high-current USB port.
Exposed paddle (bottom); connect to GND directly beneath package.
5
6
7
8
9
10
11
12
EP
EN
TS
DATA
STAT2
STAT1
USBSEL
USBL
USBH
In
In/Out
In/Out
Out
Out
In
In/Out
In/Out
Pin Configuration
TDFN33-12
(Top View)
USB
BAT
GND
CHR
EN
TS
1
2
3
4
5
6
12
11
10
9
8
7
USBH
USBL
USBSEL
STAT1
STAT2
DATA
2
3688.2006.04.1.3

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