24V Input, 2A, 600kHz, 4S Cell Switching Li-Ion Battery Charger



The MP26124 is a monolithic, DC/DC, step-down, switching charger for 4-series cell Li-ion battery packs. The MP26124 has an integrated high-side power MOSFET that can output a charge current up to 2A and also has peak-current-mode control for fast loop response and easy compensation.
The MP26124 uses a sense resistor to control a programmable charge current and regulates the charge current and charge voltage accurately using two control loops.
The MP26124 has multiple fault condition protections including cycle-by-cycle current limiting and thermal shutdown. Other safety features include battery temperature monitoring and protection, charge status indication, and a programmable timer to stop the charging cycle when the timer expires.
The MP26124 requires a minimal number of readily available external components and is available in a QFN-16 (4mmx4mm) package.


  • Charge 4S Cell Li-Ion Battery Packs
  • Up to 24V Operation Voltage
  • Programmable Charging Current up to 2A
  • ±0.75% VBATT Accuracy
  • 0.2Ω Integrated Power MOSFET
  • Up to 90% Efficiency
  • Fixed 600kHz Frequency
  • Preconditioning for Fully Depleted Batteries
  • Charging Status Indicator
  • Input Supply Fault Indicator
  • Thermal Shutdown
  • Cycle-by-Cycle Over-Current Protection (OCP)
  • Battery Temperature Monitor and Protection
  • Available in a QFN-16 (4mmx4mm) Package


  • Operating Vin (min) (V)3.45
  • Operating Vin (max) (V)24
  • Absolute Vin (max) (V)28
  • Series Cells4
  • GradeCatalog
  • Special FeaturesBatt NTC Monitor
  • NVDCNo
  • Vbatt (max) (V)4.2
  • Vbatt (min) (V)4.2
  • Battery TypeLi-Ion
  • Icharge (max) (A)2
  • fsw (kHz)600
  • Control InterfaceStandalone
  • PackageQFN-16 (4x4)
  • TimerYes
  • NTC MonitoringYes
  • EN ControlYes
  • Charge Status Yes