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參數(shù)資料
| 型號： | AIC1804 |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | CMOS Differential 4-Channel Analog Multiplexer/Demultiplexer with Logic-Level Conversion 16-SOIC -55 to 125 |
| 中文描述： | 三或四節(jié)鋰離子電池保護(hù)IC |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 170K |
| 代理商： | AIC1804 |
AIC1804
8
the positive terminal of the
battery cell BAT3 for cell-
balancing bleeding function
under overcharge condition.
PIN12: VC2 -
Input
voltage sensing. This pin is to be
connected
to
terminal of the battery cell BAT3.
pin
for
battery
BAT3
the
positive
PIN13: UD2 - This pin is to be connected to the
positive terminal of the battery
cell
BAT2
bleeding
for
function
cell-balancing
under
overcharge condition.
PIN14: VC1 -
Input
voltage sensing. This pin is to be
connected
to
terminal of the battery cell BAT2.
pin
for
battery
BAT2
the
positive
PIN15: UD1 -
This pin is to be connected to the positive terminal of the batt
PIN16: VCC -
Power supply pin and input for
battery BAT1 voltage sensing.
This pin is to be connected to the
positive terminal of the battery
cell BAT1.
n
APPLICATION INFORMATIONS
THE OPERATION
Initialization
On initial power-up, such as connecting the
battery pack for the first time to the AIC1804, the
AIC1804 enters the power-down mode. A
charger must be applied to the AIC1804 circuit
to enable the pack.
Overcharge Protection
When the voltage of either of the battery cells
exceeds the overcharge protection voltage
(V
OCP
) beyond the overcharge delay time (T
OC
)
period, charging is inhibited by the turning-off of
the
charge
control
overcharge delay time is set by the external
capacitor
C
TC
.
Inhibition
immediately released when the voltage of the
overcharged
cell
becomes
overcharge release voltage (V
OCR
or
V
OCP
-V
HYS
)
through discharging.
MOSFET
M2.
The
of
charging
is
lower
than
Overdischarge Protection
When the voltage of either of the battery cells
falls below the overdischarge protection voltage
(V
ODP
) beyond the overdischarge delay time
(T
OD
) period, discharging is inhibited by the
turning-off of the discharge control MOSFET M1.
The overdischarge delay time is set by the
external capacitor C
TD
.
Inhibition of discharging
is immediately released when the voltage of the
overdischarge cell becomes higher than the
overdischarge release voltage (V
ODR
) through
charging.
Overcurrent Protection
In normal mode, the AIC1804 continuously
monitors the discharge current by sensing the
voltage of CS pin. If the voltage V
CC
-V
CS
exceeds the overcurrent protection voltage (V
OIP
)
beyond the overcurrent delay time (T
OI
)
period,
the overcurrent protection circuit operates and
discharging is inhibited by the turning-off of the
discharge control MOSFET M1. Discharging
must be inhibited for at least 256mS after
overcurrent takes place to avoid damage to
external control MOSFETs due to rapidly
switching transient between BATT+ and BATT-
terminals. The overcurrent condition returns to
normal mode when the load is released and the
impedance between the BATT+ and BATT-
terminals is 20M
or higher.
The AIC1804 is provided with the three
overcurrent detection levels (0.15V, 0.3V and
1.0V) and the three overcurrent delay time (
TOI1
,
T
OI2
and T
OI3
) corresponding to each overcurrent
detection level. T
OI1
is set by the external
capacitor C
TI
. T
OI2
and T
OI3
default to 4mS and
300
μ
s respectively, and can not be adjusted due
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