HY2120
2-Cell Lithium-ion/Lithium Polymer Battery Packs Protection ICs
1. General Description
The series of HY2120 ICs is best created for 2-cell lithium-ion/lithium polymer rechargeable battery
protection and it also comprises high-accuracy voltage detectors and delay circuits.
These ICs are suitable for protecting 2-cell rechargeable lithium-ion/lithium polymer battery packs
against the problems of overcharge, overdischarge and overcurrent.
2. Features
The features that whole series of HY2120 comprised are as follows:
(1) High-accuracy voltage detection circuit
● Overcharge detection voltage VCUn (n＝1, 2)
● Overcharge release voltage VCRn (n＝1, 2)
4.10 to 4.50V
3.90 to 4.30V
Accuracy ±25mV
Accuracy ±50mV
Accuracy ±80mV
Accuracy ±100mV
● Overdischarge detection voltage VDLn (n＝1, 2) 2.00 to 3.20V
● Overdischarge release voltage VDRn (n＝1, 2) 2.30 to 3.40V
● Discharge overcurrent detection voltage
● Charge overcurrent detection voltage
● Short-circuiting detection voltage
(by option)
(by option)
1.0V(fixed)
Accuracy ±30mV
Accuracy ±0.4V
(2)Delay times are generated by an internal circuit (external capacitors are unnecessary).
● Overcharge delay time
1000ms typ.
110ms typ.
10ms typ.
7ms typ.
● Overdischarge delay time
● Discharge overcurrent delay time
● Charge overcurrent detection voltage
● Short circuit delay time
.
250μs typ.
(3) Low current consumption(Products with Power-down Function)
● Operation mode
5.0μA typ., 9.0μA max. (VDD=7.8V)
0.1μA max. (VDD=4.0V)
● Ultra low power-down current at
(4) High-withstanding-voltage device is used for charger connection pins
(CS pin and OC pin : Absolute maximum rating = 33 V)
(5) 0 V battery charge function “available” / “unavailable” are selectable
(6) Wide operating temperature range −40°C to +85 °C
(7) Small package
SOT-23-6
(8) The HY2120 series are Halogen-free, green package
3. Applications
2-cell lithium-ion rechargeable battery packs
2-cell lithium polymer rechargeable battery packs
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www.hycontek.com
DS-HY2120-V15_EN
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