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TS2207AB Fiches technique(PDF) 1 Page - Taiwan Semiconductor Company, Ltd

No de pièce TS2207AB
Description  Li-Ion Battery Protector Ideal for One-Cell Rechargeable Li-Ion Battery
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Fabricant  TSC [Taiwan Semiconductor Company, Ltd]
Site Internet  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

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TS2207A/B series
1-6
2003/12 rev. B
TS2207A/B
Li-Ion Battery Protector
Ideal for One-Cell Rechargeable
Li-Ion Battery
General Description
The TS2207A/B series are protection ICs design to safe guard one-cell Lithium-ion battery pack against over
charge/discharge, over current and short circuit. The TS2207A/B series use advanced high voltage CMOS process to
provide high accuracy voltage detection and low current consumption.
The TS2207A/B series incorporate a reference unit and three voltage detectors. During charging process, when the cell
voltage(VDD) is charged to a value higher than 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 drops to a value lower than 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 TS2207A/B series will enter a low current standby
mode. Once into standby mode, the system can only be released from standby mode right after the battery pack is
connected to a charger.
The conditions of over current and short circuit protection are both determined by the voltage at the V- pin. As the voltage
of V- pin reaches a higher value than VOC, which indicates 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 over current or
factors contributing to short circuit is removed, the built-in resistor at the V- pin, typically 100kΩ, will pull V- down to VSS
and bringing the IC back to normal operation.
Together with the application circuit, the TS2207A/B will function as a consummate protector, which promotes safe usage
and the sustainability of Li-ion battery packs.
Ordering Information
Note: Marking BXX,
XX
is wafer and assembly lot code (A~Z & 1~9)
Part No.
Threshold Voltage
Reel
TS2207ACX6
4.30V ~ 4.40V
Black
TS2207BCX6
4.23V ~ 4.33V
White
Features
Low current consumption
Supply current 3uA (typ) and standby current 0.6uA
High withstand voltage up to 22V (VDD ~ V-)
High accuracy voltage detection
Over charge detector: ± 50mV
Over discharge detector: ± 3.2%
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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