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Announcement: Introducing HL8545/G: Quad-Channel 50 mΩ High-Side Switch for Advanced Automotive Applications


The HL7137 is the low voltage 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 97.3% efficiency at 4.5V output and 5A current with flying capacitor,2×22µF, per phase.

The device features an OVP protection with an external FET to reduce the total BOM in applications. 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.

The device provides CC (Constant Current) and CV (Constant Voltage) regulation through the QRB FET for a safe charging operation in 2:1 CP and 1:1 BP mode. The 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 sensing the battery voltage. In addition, the device also supports thermal regulation loop in case CV/CC loop causing device over-heat during regulation operating in 2:1 CP mode.

For more detailed description of the device, please download a product brief.



  • 20V AMR on VIN pin
  • 3V to 11.7V Operational VIN Voltage
  • 5.5V Max Operational Output Voltage
  • Dual-Phase Switched Capacitor Architecture
  • Dual Conversion Modes: 2:1 CP and 1:1 BP
  • Continuous 7.5A output in both modes
  • Regulation loop for charging operation through QRB FET control
    • Input current regulation (IIN_REG)
    • Battery voltage regulation (VVBAT_REG)
    • Battery current regulation (IBAT_REG)
    • Thermal regulation (TDIE_REG)
  • 97.3% Efficiency for VOUT=4.5V_5A with 1×22µF per phase
  • Selectable switching frequency from 500kHz to 1.6MHz

Block Diagram

HL7137 - HMI Main Photo

For more information or a full datasheet request, please contact the factory at

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