Halo introduces 40W UFCS charger chip
Universal Fast Charging Standard protocol chip targets mobile and IOT devices
Halo Microelectronics, a maker of analogue and power management chips, has launched a 40W Universal Fast Charging Standard (UFCS) fast charging protocol charger chip for 1-cell Li-ion and Li-ion polymer batteries.
The HL7136 chip integrates a dual-phase switched-capacitor converter and reverse blocking MOSFET (QRB FET), achieving a 97.4 percent efficiency for 4.5V output and 5A charging current with 2x22µF per phase.
According to the company, the design enables efficient operation with a 50 percent duty cycle in the Charge Pump (CP) mode. By using the CP mode, the output voltage VOUT can be approximately half of the input voltage VIN, while the output current is doubled compared to the input current. This configuration helps minimise losses over the input power cable and prevents excessive temperature rise in the application.
The HL7136 also features a Bypass (BP) Mode. In BP Mode, the internal power FETs allow the VIN to pass directly to VOUT without undergoing any conversion process. This mode provides a straightforward path for the input voltage, catering to specific applications where voltage conversion is unnecessary.
The HL7136 provides Constant Current (CC) and Constant Voltage (CV) regulations, ensuring a secure charging operation by controlling the QRB FET. Furthermore, the device includes a thermal regulation loop to address any potential overheating issues that may arise during the CV/CC regulation process.
“The UFCS is a new protocol soon to be adopted by smartphone manufacturers globally and we are thrilled that our dual-phase 40 W charge pump charger with its low-power fast charging perfectly aligns with this protocol,” said David Nam, CEO of Halo Microelectronics.
