RT9545

Preliminary RT9545 Li-Ion Battery Protector General Description Features The RT9545 Series are protection ICs for over-charge/ discharge of rechargeable one-cell Lithium-ion (Li+) batteries by CMOS process. The RT9545 Series can detect over-charge/discharge of Li+ one-cell and excess load current and charge current, further include a short circuit protector for preventing large external short circuit current. Each of these ICs is composed of four voltage detectors, a reference unit, a hysteresis circuit, and a bidirectional short circuit protector. Package of SOT-23-6 is available. Ordering Information RT9545 Low Supply Current −Supply Current: Typical 2.0µA −Standby Current (after Detecting Over-discharge) : Less than 0.2µA High Accuracy Detector Threshold −Over-Charge Detector : −90mV to +40mV −Over-Discharge Detector : ± 2.5% Built-in Protection Circuit : Excess Current Trip/Short Circuit Protector in both Charging and Discharging Direction Output Delay of Over-charge Adjustable with an External Capacitor: 75ms at 0.01µF Ultra Small Package: SOT-23-6 RoHS Compliant and 100% Lead (Pb)-Free Package Type E : SOT-23-6 ER : SOT-23-6 (R-Type) Operating Temperature Range C : Commercial Standard P : Pb Free with Commercial Standard Over-charge / Over-discharge O : 4.35V / 2.5V T : 4.25V / 2.9V S : 4.35V / 2.9V Note : RichTek Pb-free products are : −RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. −Suitable for use in SnPb or Pb-free solder...