MICROCHIP MCP73223-C2SI/MF

A highly integrated Lithium Iron Phosphate (LiFePO4) battery charge management controller for use in space-limited and cost-sensitive applications. It provides specific charge algorithms for LiFePO4 batteries to achieve optimal capacity and safety in the shortest charging time possible. Along with its small physical size, the low number of external components makes it ideally suitable for various applications. The absolute maximum voltage, up to 18V, allows its use in harsh environments, such as low cost AC adapter or voltage spikes from plugging/unplugging.

It employs a constant current/ constant voltage charge algorithm. The 3.6V per cell factory preset reference voltage simplifies design with 2V preconditioning threshold. The fast charge, constant current value is set with one external resistor from 130 mA to 1100 mA. It also limits the charge current based on die temperature during high power or high ambient conditions. This thermal regulation optimizes the charge cycle time while maintaining device reliability.

The PROG pin also serves as the enable pin. When high impedance is applied, it will be in Standby mode. It is fully specified over the ambient temperature range of -40°C to +85°C and is available in a 10 lead DFN package.

• Complete Linear Charge Management Controller:
  • Integrated Input Overvoltage Protection (OVP)
  • Integrated Pass Transistor
  • Integrated Current Sense
  • Integrated Reverse Discharge Protection
• Constant Current/Constant Voltage Operation with Thermal Regulation
• 4.15V Undervoltage Lockout (UVLO)
• 18V Absolute Maximum Input with OVP:
  • 6.5V - MCP73123
  • 13V - MCP73223
• High Accuracy Preset Voltage Regulation Through Full Temperature Range (-5°C to +55°C):
  • ±0.5% - MCP73123
  • ±0.6% - MCP73223
• Battery Charge Voltage Options:
  • 3.6V - MCP73123
  • 7.2V - MCP73223
• Resistor Programmable Fast Charge Current: 130 mA - 1100 mA
• Preconditioning of Deeply Depleted Cells:
  • Available Options: 10% or Disable
• Integrated Precondition Timer: 32 Minutes or Disable
• Automatic End-of-Charge Control:
  • Selectable Minimum Current Ratio: 5%, 7.5%, 10% or 20%
  • Elapse Safety Timer: 4 HR, 6 HR, 8 HR or Disable
• Automatic Recharge:
  • Available Options: 95% or Disable
• Factory Preset Charge Status Output: On/Off or Flashing
• Soft Start
• Temperature Range: -40°C to +85°C
• Packaging: DFN - 10 (3 mm × 3 mm)

• Low-Cost LiFePO4 Battery Chargers
• Power Tools
• Toys
• Backup Energy Storage Solutions