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TP3102

1Cell Li-ion Battery Protector IC

Topro 

TP3102

1Cell Li-ion Battery

Protector IC

General Specification

The TP3102 series are protection IC for over-charge/discharge of rechargeable one-cell Lithium-ion

(Li+) batteries by CMOS process.

The TP3102 series can detect over-charge/discharge of Li+ one-cell and excess load current, further

include a short circuit protector for preventing large external short circuit current.

Each of these ICs is composed of three voltage detectors, a reference unit, a hysteresis circuit, and a

short circuit protector. When charging voltage crosses the detector threshold from a low value to a

value higher than VDET1, the output of COUT pin, the output of over-charge detector/VD1, switches

to low level, charger's negative pin level. After detecting overcharge the VD1 can be reset and the

output of COUT pin becomes "H" when the VDD voltage is coming down to a level lower than '

VDET1 – VHYS1 ", or when a charger is disconnected from the battery pack while the VDD level is

in between 'VDET1" and ' VDET1 – VHYS1 " in the TP3102 version.

The output of DOUT pin, the output of over-discharge detector/VD2, switches to "L" after

internally fixed delay time passed, when discharging voltage crosses the detector threshold from a

high value to a value lower than VDET2. An excess load current can be sensed and cut off after

internally fixed delay time passed through the built in excess current detector, VD3, with DOUT being

enabled to low level. Once after detecting excess current, the VD3 is released and DOUT level

switches to "H" by detaching a battery pack from a load system.

Further, short circuit protector makes Dout level to "L" immediately with external short circuit

current and removing external short circuit leads DOUT level to "H". After detecting over-discharge,

supply current will be kept extremely "L" by halting some internal circuits operation. The output

delay of over - charge detectors can be set by connecting external capacitors. Output type of COUT

and DOUT are CMOS. SOT26-w is available.

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表單編號 QW730101-05A

TOPRO CONFIDNETIAL

2003/7/28 Print

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