TP3102 View Datasheet(PDF) - Topro

Part Name

Description

Manufacturer

TP3102

1Cell Li-ion Battery Protector IC

Topro 

TP3102

1Cell Li-ion Battery

Protector IC

● VD2/Over-Discharge Detector

• The VD2 monitors a VDD pin voltage. When the VDD voltage crosses the over-discharge detector

threshold VDET2 from a high value to a value lower than the VDET2, the VD2 can sense an

over-discharging and the external discharge control Nch-MOS-FET turns to “OFF” with the DOUT

pin being at "L".

• Resetting the VD2 with the DOUT pin level being "H" again after detecting over-discharge is only

possible by connecting a charger to the battery pack. When the VDD voltage stays under

over-discharge detector threshold VDET2 charge current can flow through parasitic diode of external

discharge control Nch-MOS-FET, then after the VDD voltage comes up to a value larger than

VDET2 discharging process would be advanced

through “ON” state discharge control Nch-MOS-FET. Connecting a charger to the battery pack makes

the DOUT level being "H" instantaneously when the VDD voltage is higher than VDET2.

• When a cell voltage equals to zero, connecting charger to the battery pack makes the system

allowable for charge with higher charge voltage than Vst, 1.2V Max.

• An output delay time for the over-discharge detection is fixed internally. Though the VDD voltage

would be going down to a lower level than VDET2 if it is within a time period of the output delay

time, VD2 would not output a signal for turning “OFF” of discharge control Nch-MOS-FET.

• After detection of an over-discharge by VD2, supply current would be reduced to 0.2 µATYP. at

VDD=2.0V and into standby, only the charger detector is operating.

• The output type of DOUT pin is CMOS having “H” level of VDD and “L” level of Vss.

Print Page 7 of 13

表單編號 QW730101-05A

TOPRO CONFIDNETIAL

2003/7/28 Print

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