The LP4032 is a standalone 1-cell switching battery charger providing up to 2A charge current to the battery from 4.1V to 6.2V input voltage. The charge current is programmable by a resistor connected from ISET to GND and the charge voltage is programmable by a resistor connected from VSET to GND. The charge can be enabled and disabled from ISET pin. The LP4032 operates at 1.2MHz switching frequency allowing a small-size 1uH inductor for 2A fast charging. The patent-protected integrated current sensing technique eliminates external sensing resistor allowing very high charge efficiency, low BOM cost and very small footprint (20mmx10mm). The precharge, fastcharge and termination current accuracy is competitive with external-resistor-based current sensing architecture. LP4032 is available in DFN3x3-10 package.
Current sensorless, high integration, 1uH inductor, high efficiency
封装
DFN3x3-10
特征
特征
◆ Easy-to-use standalone high-efficiency 1-cell switching charger -Proprietary sensorless technique -4.1V to 6.2V input voltage with 28V absolute maximum input voltage rating -Resistor programmable charge voltages 4.1V/4.2V/4.35V/4.4V -2.0A maximum fast charge current -1.2MHz switching frequency -95% high efficiency @ VBAT=3.8V, ICHG=1A -93% high efficiency @ VBAT=3.8V, ICHG=2A -Input voltage regulation to allow weak input power source to charge battery (VINDPM) -Support trickle charge, precharge, Constant Current (CC) charge and Constant Voltage (CV) charge, charge termination and recharge ◆ High charge accuracy -+/- 0.5% charge voltage regulation -+/- 6% charge current regulation ◆ High integration -Integrated all MOSFETs -Internal loop compensation -Internal bootstrap diode -LED charge indication driver ◆ Protections -Cycle-by-cycle current limit protection -Input under-voltage lockout (UVLO) -Input over-voltage protection (OVP) -Cold/hot battery temperature monitoring -Junction temperature thermal regulation -Charge safety timer ◆ Packaging -DFN3x3-10 -RoHS compliant and halogen free -100% lead (Pb) free
