參數(shù)資料
型號(hào): AAT3680ITP-4.2-T1
廠商: Advanced Analogic Technologies, Inc.
英文描述: Lithium-Ion Linear Battery Charge Controller
中文描述: 鋰離子線性電池充電控制器
文件頁數(shù): 9/18頁
文件大?。?/td> 265K
代理商: AAT3680ITP-4.2-T1
Protection Circuitry
The AAT3680 is truly a highly integrated battery
management system IC including several protection
features. In addition to battery temperature monitor-
ing, the IC constantly monitors for over-current and
over-voltage conditions; if an over-current situation
occurs, the AAT3680 latches off the pass device to
prevent damage to the battery or the system, and
enters shutdown mode until the over-current event is
terminated.
An over voltage condition is defined as a condition
where the voltage on the BAT pin exceeds the max-
imum battery charge voltage. If an over-voltage con-
dition occurs, the IC turns off the pass device until
voltage on the BAT pin drops below the maximum
battery charge constant voltage threshold. The
AAT3680 will resume normal operation after the
over-current or over voltage condition is removed.
During an over-current or over-voltage event, the
STAT will report a FAULT signal.
In the event of a battery over-temperature condition,
the IC will turn off the pass device and report a
FAULT signal on the STAT pin. After the system
recovers from a temperature fault, the IC will resume
operation in the 1X trickle charge mode to prevent
damage to the system in the event a defective bat-
tery is placed under charge. Once the battery volt-
age rises above the trickle charge to constant cur-
rent charge threshold, the IC will resume the con-
stant current mode.
AAT3680
Lithium-Ion Linear Battery Charge Controller
3680.2003.4.0.91
9
High Speed Data Reporting Application Schematic
Q1
FZT788B
AAT3680
C2
10
μ
F
C1
μ
F
R2
100k
R
SENSE
0.2
R1
BATT+
BATT-
TEMP
RT1
RT2
VP
VP
Battery
Pack
DRV
CSI
VP
VSS
STAT
TS
BAT
TX2
STAT
C3
0.1
μ
F
100k
Figure 4: Typical Charge Profile
Preconditioning
(Trickle Charge)
Phase
Constant Current
Phase
Constant Voltage
Phase
Output Charge
Voltage (V
CH
)
Preconditioning
Voltage Threshold
(V
MIN
)
Regulation
Current
(I
CHARGE(REG)
)
Trickle Charge
and Termination
Threshold
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