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TS2208ACX6 Folha de dados(PDF) 1 Page - Taiwan Semiconductor Company, Ltd

Nome de Peças TS2208ACX6
Descrição Electrónicos  Li-Ion Battery Protector Ideal for One-Cell Rechargeable Li-Ion Battery
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Fabricante Electrônico  TSC [Taiwan Semiconductor Company, Ltd]
Página de início  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

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TS2208A/B series
1-6
2003/12 rev. B
TS2208A/B
Li-Ion Battery Protector
Ideal for One-Cell Rechargeable
Li-Ion Battery
General Description
The TS2208A/B series are over-charge/discharge protection ICs for rechargeable one-cell Lithium-ion batteries. They
bear an over-charge/over-discharge threshold for the battery cell voltage during charging/discharging process, and also
provide on-time protection when excess current or short circuit occurs.
The TS2208A/B series are essentially composed of a reference unit and three voltage detectors. During charging
process, when the cell voltage/VDD crosses the over-charge threshold voltage VC1, the over charge detector (COM1) will
switch the output pin (COUT) to a low level within a delay time (tC1), and thus turning off the MOSFET connected to the
charging path. The COUT pin may change to high level again when the VDD voltage falls below “VC1-VHYS”, or when VDD
falls below VC1 while the charger is disconnected from the battery pack.
During the discharging process, when the VDD voltage crosses the over-discharge threshold voltage (VD1), the
over-discharge detector (COM2) will switch DOUT to low level within a delay time (tD1), and thus turning off the MOSFET
connecting the discharging path. In the mean time, the TS2208A/B series will enter a low current standby mode. Once
into standby mode, it can only be released from standby after the battery pack is connected to a charger.
The conditions of excess current and short circuit protection are both determined according to the voltage at the V- pin.
As the voltage of V- pin reaches a greater value than VOC, which means an undesirable large current is flowing through
the path, DOUT will be switched to a low level and the path is cutoff after internally pre-set delay time (tOC) elapses. In the
case of short circuit, i.e. V- rises above VSHORT, the path will also be cutoff but with almost no delay time. Once the excess
current or short circuit fault is removed, the built-in resistor at the V- pin, typically 100kohm, will pull V- down to VSS and
bringing the IC back to normal operation.
Together with the application circuit, the TS2208A/B will function as a consummate protector for Li-ion battery packs
which leads to safety and long lifetime.
Ordering Information
Note: Marking BXX,
XX is wafer and assembly lot code (A~Z and 1~9)
Part No.
Threshold Voltage
Reel
TS2208ACX6
4.33V ~ 4.37V
Black
TS2208BCX6
4.26V ~ 4.30V
White
Features
Low current consumption
Supply current 3uA (typ) and standby current 0.1uA
High withstand voltage up to 22V (VDD ~ V-)
High accuracy voltage detection
Over charge detector
Over discharge detector
Over current and short circuit protection
Small package of SOT-26
Applications
Over-charge and over-discharge protection for Li-ion
cell pack
High precision protectors for cell-phones and other
gadget using on board Li-ion cell battery
Pin Description
No.
Symbol
Description
1
DOUT
Output of over discharge detection
2
V
-
Pin for charger negative input
3
COUT
Output of over charge detection
4
CEXT
Pin for external capacitor Setting
COM1 delay time
5
VDD
Power supply
6
VSS
Ground
Pin assignment
1. DOUT
2. V
-
3. COUT
4. CEXT
5. VDD
6. VSS


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