HL7132

The HL7132 is the low voltage 2:1 fast direct charger for 1 cell Li-ion and Li-polymer batteries. The device integrates a dual phase switched capacitive converter, a reverse blocking MOSFET (QRB FET) and shows 97.11% efficiency at 4.5V output and 5A current with flying capacitor,1x22µF, per phase. The switched capacitor converter architecture and the integrated FETs in the device are optimized to enable a 50% duty cycle operation under Charge Pump (CP) Mode. The 2:1 CP mode allows the output voltage, VOUT, to be around half of the input voltage, VIN, and the output current to be double of the input current, reducing the losses over the input power cable as well as limiting the temperature rise in the application. The dual-phase architecture reduces the input capacitance requirements as well as reducing the input voltage ripple. The HL7132 provides CC (Constant Current) and CV (Constant Voltage) regulation through controlling the QRB FET for a safe charging operation. CC regulation is controlled through a close loop of the input current sensing or battery current sensing and CV regulation is controlled through a close loop of the battery voltage sensing. In addition, HL7132 also supports thermal regulation loop in case CV/CC loop causing device over-heat during regulation operating. The HL7132 has all the necessary protections to ensure the safe operation. The device includes OTP (Over-Temperature Protection), VIN UVP (Under-Voltage Protection)/OVP (Over-Voltage Protection), IIN OCP )Over-Current Protection)/UCP (Under-Current Protection), VOUT OVP/UVP, VBAT OVP, IBAT OCP, PMID to VOUT OV/UV, CFLY SCP (Short Circuit Protection), VIN SCP, VOUT SCP, QRB RCP (Reverse-Current Protection) and Watchdog Timer. Besides all the protections above, HL7132 also features 10-bit ADC that can offer VIN, IIN, VOUT, VBAT, IBAT, VTS, TDIE information to system for optimizing charging control.HL7132 is available in a 42-Bump WLCSP package with 2.95mm x 2.6mm size.