AAT3682 データシートの表示（PDF） - Skyworks Solutions
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AAT3682 Datasheet PDF : 18 Pages
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Functional Block Diagram
DATA SHEET
AAT3682
Li-Ion/Polymer Linear Battery Charger
VP
T2X
CSI
BSENSE
TS
VCC
2X Trickle
Charge
Control
Current Loop
Error Amp
VREF
Voltage Loop
Error Amp
Voltage
Comparator
Temperature
Sense
Comparator
Loop Select
MUX
Driver
Charge Status
Logic Control
Microcontroller
Status Generator
MUX
LED Signal
Generator
Microcontroller
Read Enable
T2X
Power-On
Reset
Under-Voltage
Lock Out
Over-Current /
Short-Circuit
Protection
BAT
GATE
DRV
STAT
VSS
Functional Description
The AAT3682 is a linear charger designed for single-cell
lithium-ion/polymer batteries. It is a full-featured bat-
tery management system IC with multiple levels of
power savings, system communication, and protection
integrated inside. Refer to the block diagram above and
the flow chart and typical charge profile graph (Figures
1 and 2) in this section.
Cell Preconditioning
Before the start of charging, the AAT3682 checks sev-
eral conditions in order to maintain a safe charging envi-
ronment. The input supply must be above the minimum
operating voltage, or under-voltage lockout threshold
(VUVLO), for the charging sequence to begin. Also, the cell
temperature, as reported by a thermistor connected to
the TS pin, must be within the proper window for safe
charging.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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201884B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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