Описание
The MCP73123 is a highly integrated Lithium Iron Phosphate (LiFePO4) battery charge management controller for use in space-limited and cost-sensitive applications. The MCP73123 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 the MCP73123 ideally suitable for various applications. The absolute maximum voltage, up to 18V, allows the use of MCP73123 in harsh environments, such as low cost AC adapter or voltage spikes from plugging/unplugging. The MCP73123 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. The MCP73123 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 of the MCP73123 also serves as enable pin. When high impedance is applied, the MCP73123 will be in Standby mode. The MCP73123 is fully specified over the ambient temperature range of -40°C to +85°C. The MCP73123 is available in a 10 lead DFN package.
- Complete Linear Charge Management Controller:
- Integrated Input Overvoltage Protection
- 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 x 3 mm)
