The LP4120 is a standalone Boost switching battery charger to charge 2-cell batteries at up to 2A charge current. The charge voltage is programmable with a resistor connected to VSET pin and GND, and the charge current is programmable with a resistor connected to ISET pin and GND. The 2-cell switching battery charger operates at 1.3MHz switching frequency to allow a small size of 1µH inductor with low DCR loss. A cell balance circuit is integrated in LP4120 to balance battery cell voltages to avoid battery overcharge.
High charge efficiency, cell balance, 1.3MHz SW freqeucny and small 1uH inductor, NTC
封装
DFN-10
特征
特征
◆ Easy-to-use standalone 2-cell synchronous Boost switching charger - Proprietary charge current control - 4.5V to 6.2V input voltage operation - 20V absolute maximum input voltage rating - Charge voltages:8.2V/8.3V/8.4V/8.6V/8.7V - 0.35A-2.0A maximum fast charge current - 1.3MHz switching frequency - 1uH inductor for low DCR loss and small footprint - 93% charge efficiency at 1A charge - Support Precharge, Constant Current (CC) charge, Constant Voltage (CV) charge, charge termination and recharge - Battery short circuit protection - Resistor programmable charge voltage - Resistor programmable charge current - Cell balance to avoid battery overcharge ◆ High charge accuracy - -+/-0.75% charge voltage regulation - -+/-7.5% switching charge current regulation ◆ Protections - Cycle-by-cycle current limit protection - Input voltage regulation (VINDPM) - Battery short protection - Cold/hot battery temperature monitoring - Junction temperature thermal regulation (TREG) ◆ Packaging - DFN3x3-10L - RoHS compliant and halogen free - 100% lead (Pb) free
