Описание
The MCP73826 is a linear charge management controller for use in space-limited, cost sensitive applications. The MCP73826 combines high accuracy constant voltage, controlled current regulation, and cell preconditioning in a space saving 6-pin SOT-23A package. The MCP73826 provides a stand-alone charge management solution. The MCP73826 charges the battery in three phases: preconditioning, controlled current, and constant voltage. If the battery voltage is below the internal low-voltage threshold, the battery is preconditioned with a foldback current. The preconditioning phase protects the lithium-ion cell and minimizes heat dissipation. Following the preconditioning phase, the MCP73826 enters the controlled current phase. The MCP73826 allows for design flexibility with a programmable charge current set by an external sense resistor. The charge current is ramped up, based on the cell voltage, from the foldback current to the peak charge current established by the sense resistor. This phase is maintained until the battery reaches the charge-regulation voltage. Then, the MCP73826 enters the final phase, constant voltage. The accuracy of the voltage regulation is better than ±1% over the entire operating temperature range and supply voltage range. The MCP73826-4.1 is preset to a regulation voltage of 4.1V, while the MCP73826- 4.2 is preset to 4.2V. The MCP73826 operates with an input voltage range from 4.5V to 5.5V. The MCP73826 is fully specified over the ambient temperature range of -20°C to +85°C.
- Linear Charge Management Controller for Single Lithium-Ion Cells
- High Accuracy Preset Voltage Regulation: +1% (max)
- Two Preset Voltage Regulation Options:- 4.2V – MCP73826-4.2
- Programmable Charge Current
- Automatic Cell Preconditioning of Deeply Depleted Cells, Minimizing Heat Dissipation During Initial Charge Cycle
- Automatic Power-Down when Input Power Removed
- Temperature Range: -20°C to +85°C
- Packaging: 6-Pin SOT-23A
