R5460N209AD Datasheet | RICHO

R5460x2xx SERIES Li-ION/POLYMER 2-CELL PROTECTOR NO.EA-165-160603 OUTLINE The R5460x2xxxx Series are high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable two-cell Lithium-ion (Li+) / Lithium polymer, further include a short circuit protection circuit for preventing large external short circuit current and the protection circuits against the excess discharge-current and excess charge current. Each of these ICs is posed of six voltage detectors, a reference unit, a delay circuit, a short circuit protector, an oscillator, a counter, and a logic circuit. When the over-charge voltage threshold or excess-charge current threshold crosses the each detector threshold from a low value to a high value, the output of COUT pin switches to “L” level after internal fixed delay time. To release over-charge detector after detecting over-charge, the detector can be reset and the output of COUT bees "H" when a kind of load is connected to VDD after a charger is disconnected from the battery pack and the cell voltage bees lower than over-charge detector threshold. In case that a charger is continuously connected to the battery pack, if the cell voltage bees lower than the over-charge released voltage, over-charge state is also released. The output of DOUT pin, the output of the over-discharge detector and the excess discharge-current detector, switches to “L” level after internally fixed delay time, when discharged voltage crosses the detector threshold from a high value to a value lower than VDET2. The conditions to release over-discharge voltage detector after detecting over-discharge voltage are as follows: A/D versions: after connecting a charger, when the cell voltage bees higher than over-discharge detector threshold or, without connecting charger, when the cell voltage bees equal or higher than over-discharge released voltage. C version: after connecting a charger, when the cell voltage bees higher than over-discharge detector threshold voltage. E...