Описание
The MCP73812 device is linear charge management controllers that are designed for use in space limited and cost sensitive applications. The MCP73812 provide specific charge algorithms for single cell Li-Ion or Li-Polymer battery to achieve optimal capacity in the shortest charging time possible. Along with its small physical size, the low number of external components required make the MCP73812 ideally suited for portable applications. For applications charging from a USB port, the MCP73811 adheres to all the specifications governing the USB power bus. The MCP73812 employ a constant current/constant voltage charge algorithm. The constant voltage regulation is fixed at 4.20V, with a tight regulation tolerance of 1%. For the MCP73811, the constant current value is selected as 85 mA (low power USB port) or 450 mA (high power USB port) with a digital input signal on the PROG input. For the MCP73812, the constant current value is set with one external resistor. The MCP73812 limit 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 MCP73812 are fully specified over the ambient temperature range of -40°C to +85°C. The MCP73812 are available in a 5-Lead, SOT-23 package.
- Complete Linear Charge Management Controller
- Integrated Pass Transistor
- Integrated Current Sense
- Integrated Reverse Discharge Protection
- Constant Current / Constant Voltage Operation with Thermal Regulation
- High Accuracy Preset Voltage Regulation: + 1%
- Voltage Regulation: 4.20V
- Selectable Charge Current:
- MCP73811: 85 mA / 450 mA
- Programmable Charge Current:
- MCP73812: 50 mA – 500 mA
- Minimum External Components Required:
- MCP73811: 2 Ceramic Capacitors
- MCP73812: 2 Ceramic Capacitors and 1 Resistor
- No Preconditioning
- External End-of-Charge Control
- Automatic Power-Down when Input Power Removed
- Active High Charge Enable
- Temperature Range:
- -40°C to +85°C
- Packaging:
- 5-Lead SOT-23
