AIC1802 AIC [Analog Intergrations Corporation], AIC1802 Datasheet

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AIC1802

Manufacturer Part Number
AIC1802
Description
Two-Cell Lithium-Ion Battery Protection IC
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet
n
n
n
DS-1802-03
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
l
l
l
l
l
l
l
l
Ultra-Low Quiescent Current at 10 A (V
V
Ultra-Low Power-Down Current at 0.2 A (V
=3.8V, V
Wide Supply Range: 2 to 18V.
Precision Overcharge Protection Voltage
4.35V
4.30V
4.25V
Built-in Delay Circuits for Overcharge, Over-
discharge and Overcurrent Protection.
Overcharge and Overdischarge Delay Time
can be Extended by External Capacitors.
Built-in Cell-balancing Bleeding Network under
Overcharge Condition.
Protection IC for Two-Cell Lithium-Ion Battery
Pack.
C
=3.5V).
July 13, 00
30mV for the AIC1802A
30mV for the AIC1802B
30mV for the AIC1802C
C
=1.9V).
BATTERY 1
BATTERY 2
CEM9926
Protection Circuit for Two-Cell Lithium-Ion Battery Pack
M1
**R1
**R2
*C
**R1 & R2: Refer application informations.
TC
Two-Cell Lithium-Ion Battery Protection IC
1 F
1 F
C1
C2
& C
TD
are optional for delay time adjustment.
www.analog.com.tw
CC
4
2
6
8
=7V,
VCC
VC
GND
OD
CC
AIC1802
n
OC
CS
TC
TD
DESCRIPTION
The AIC1802 battery protection IC is designed
to protect lithium-ion batteries from damage due
to
overcurrent for two series cells in portable
phones and laptop computers. It can be a part of
the low-cost charge control system within a two-
cell lithium-ion battery pack.
Safe and full utilization charging is ensured by
the accurate
Three
overcharge protection voltage are provided for
various protection requirements. The very low
standby current drains little current from the
cells while in storage.
R6
1K
5
3
1
7
overcharging,
*C
*C
CEM9926
M2
TD
TC
different
R3
1M
Q1
30mV overcharge detection.
C3
0.01 F
specification
overdischarging,
V
BAT
R4
1M
R5
1M
+
V
BAT
AIC1802
-
values
and
for
1

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AIC1802 Summary of contents

Page 1

... Protection Circuit for Two-Cell Lithium-Ion Battery Pack DS-1802-03 July 13, 00 Two-Cell Lithium-Ion Battery Protection IC n DESCRIPTION =7V, The AIC1802 battery protection IC is designed CC to protect lithium-ion batteries from damage due to CC overcurrent for two series cells in portable phones and laptop computers. It can be a part of the low-cost charge control system within a two- cell lithium-ion battery pack ...

Page 2

... ORDERING INFORMATION AIC1802 XCX PACKAGE TYPE S: SOP-8 OVERCHARGE PROTECTION VOLTAGE A: 4.35V B: 4.30V C: 4.25V n ABSOLUTE MAXIMUM RATINGS Supply Voltage ....................................… … … … … ..................................................... 18V DC Voltage Applied on VC, CS, OC, OD Pins ...............… … … … … .............................. DC Voltage Applied on TC, TD Pins ...............… … … … … … … ..… … .............................. ...

Page 3

... OD1 =4.8V, V =2.4V OD2 C =0. =7V, V =3.5V OI1 V =0.15V CS V =7V, V =3.5V OI2 V =0.36V CS V =8.6V, V =4.3V Pin Short to GND V DL AIC1802 MIN. TYP. MAX. UNIT 0.8 1.2 A 400 600 nA 4.32 4.35 4.38 4.27 4.30 4.33 V 4.22 4.25 4.28 3.85 4.0 4.15 V 2.25 2.4 2.55 V 2.85 3.0 3.15 V 135 150 165 ...

Page 4

... AIC1802B 145 142.5 140 - SYMBOL MIN. TYP. MAX -0.55 -0 5.4 7.7 UD Power-down Current vs. Supply Voltage 3.8 4.3 4.8 Supply Voltage (V) Overcurrent Protection Voltage vs. Temperature V = =3. Temperature ( C) AIC1802 UNIT 0 =1/ = 5.3 5 ...

Page 5

... CC V =3.5V C 0.9 0.7 0.5 - 4.025 4.020 4.015 4.010 4.005 - AIC1802 (Continued) Power-Down Current vs. Temperature - Temperature ( C) Overcharge Release Voltage vs. Temperature - Temperature ( C) =4.8V =2. ...

Page 6

... DETECTOR 2 OVERDISCHARGE DETECTOR 2 OVERCURRENT OVERCURRENT DETECTOR DELAY CIRCUIT PIN 5: TC the charge control PIN inhibited by PIN 7: CS PIN 8: VCC - Power supply pin AIC1802 5 OVERCHARGE DELAY CIRCUIT OVERDISCHARGE DELAY CIRCUIT 3 POWER- VCC DOWN LOGIC CONTROL WAKE- UP TIMING 1 GENERATION CHARGE ...

Page 7

... A (V unusual case where one overdischarged while the other under overcharge condition, the AIC1802 will turn off all the delay time period, . Inhibition of TC protection ) defaults to 25mS OD ...

Page 8

... Unbalanced Discharge after Overcharge When either of the battery cells is overcharged, the AIC1802 will automatically discharge the overcharged cell at about 7.7mA until the voltage of the overcharged cell is equal to the voltage of the other cell. If the voltage of the other cell is below V , the internal cell-balance “bleeding” ...

Page 9

... Otherwise, overcharge release voltage protection voltage and the charging current may oscillate. In addition, if overcharge protection function occurs, AIC1802 will discharge the overcharged cell and will stop bleeding function even if the voltage is not equal to the other. The recommended resistance of R1 and R2 is from ...

Page 10

... PHYSICAL DIMENSIONS l 8 LEAD PLASTIC SO (unit: mm AIC1802 SYMBOL MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80 4.00 e 1.27(TYP) H 5.80 6.20 L 0.40 1.27 10 ...

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