ON Semiconductor – Bringing Extensive Experience to the Protection, Monitoring, and Charging of Battery-Connected Devices

With the advent of the Internet of Things, battery-powered devices are quickly becoming the norm in many connected applications. ON Semiconductor offers unique solutions for the protection, monitoring, and charging of the battery-connected devices powering the Internet of Things.

PROTECTION: LC05111/12/32 Battery Protection Controllers

The LC051xx family of battery protection controllers integrates a battery protection circuit with a power MOSFET, enabling the design of a complete battery protection solution with few external parts.


  • Integrated power MOSFET
  • Low RDS(ON)
  • Few external parts required



MONITORING: LC709203F Fuel Gauge for 1-Cell Lithium-Ion Batteries
The LC709203F measures the battery’s Relative State of Charge (RSOC) using ON Semiconductor’s unique HG-CVR algorithm, eliminating the need for a sense resistor and providing accurate RSOC information even under unstable conditions such as changes in battery temperature, loading, aging, or self-discharge.


  • No external sense resistor
  • Low power consumption
  • I2C interface

  • LC709203FQH-01-GEVB and LC709203FXE-01-GEVB evaluation boards



CHARGING: NCP1850/1/2/4/5 Switching Battery Chargers

The NCP185x devices are fully programmable single cell Lithium-ion switching battery chargers optimized for charging from a USB compliant input supply and AC adaptor power source. The devices integrate a synchronous PWM controller, power MOSFETs, and the entire charge cycle monitoring including safety features under software supervision.


  • 1.5A to 2.5A charging with automatic input current limit
  • Dual path management
  • Fully I2C programmable

NCS210/1/4 Current Sense Amplifiers
The NCS21x are voltage output current shunt monitors that can measure voltage across shunts at common mode voltages from -0.3V to 26V, independent of supply voltage. The low offset of the zero-drift architecture enables current sensing with maximum drops across the shunt as low as 10mV full-scale.


  • Wide common mode input range -0.3V to 26V
  • Zero drift precision
  • ±1% gain error