New dual-phase charge pump charger has 1:2 reverse boost mode

Halo Microelectronics has launched its HL7132D, a dual-phase 30W charge pump with 1:2 reverse boost mode.

The device is a low-voltage fast direct charger for 1-cell Li-ion and Li-polymer batteries. The device incorporates a dual-phase switched capacitive converter and reverse blocking MOSFET (QRB FET) while achieving over 97% efficiency at 4.5V output and 4A current, with one flying capacitor of 1x22µF per phase at FSW = 1.1MHz.

The device offers two different switching modes – a 2:1 charge pump mode that permits the output voltage (VOUT) to be around half of the input voltage (VIN) and the output current to be doubled the input current and a 1:2 reverse charge pump mode that enables a voltage at VIN double the VOUT voltage.

Also, the device provides CC and CV regulations through controlling QBR FET for safe charging operation in a 2:1 charge pump mode. The CC regulation is closely monitored via a close loop of the input current sensing or battery current sensing, and the CV regulation is controlled via a close loop of the battery voltage sensing. To further enhance safety, the device is equipped with a thermal regulation loop that kicks in if the CC/CV loop results in overheating during the operation in 2:1 charge pump mode.

The device is offered in a 2.95mm x 2.6mm, 42-bump WLCSP and is excellent for smartphones, tablet computing, and IoT devices.

"The HL7132D is poised to become yet another cutting-edge addition to our extensive family of dual-phase charge pumps," said David Nam, CEO of Halo Microelectronics. "Offering both a 2:1 charge pump and a 1:2 reverse charge pump, along with a comprehensive range of safety features, Halo Microelectronics is dedicated to pursuing the boundaries of innovation and revolutionising the consumer electronics and IoT industry."