MCP73213-A6SI/MF: A Dual-Cell Li-Ion/Li-Polymer Charge Management Controller
In the realm of portable electronics and embedded systems, efficient and reliable battery charging is paramount. The MCP73213-A6SI/MF from Microchip Technology stands out as a highly integrated, linear charge management controller designed specifically for dual-cell lithium-ion (Li-Ion) or lithium-polymer (Li-Polymer) batteries. This device encapsulates a complete charging solution within a single 8-pin package, simplifying design and enhancing system performance.
The core functionality of the MCP73213 is to manage the precise charging cycle for two battery cells in series (8.4V). It automates the process through the distinct phases: pre-conditioning (trickle charge), constant current (CC), and constant voltage (CV). This meticulous control is critical for maximizing battery capacity, ensuring safety, and extending the overall lifespan of the battery pack. A key feature is its input voltage regulation (VREG), which allows the IC to operate from a higher voltage adapter (e.g., 9V to 18V) while regulating its input to a lower, more optimal voltage, thereby minimizing power dissipation and thermal stress during charging.
The charger's versatility is further demonstrated by its programmable charge current, set via an external resistor, allowing designers to tailor the charging speed to the specific application's thermal and power delivery constraints. Integrated safety features are robust, including thermal shutdown to protect the IC from overheating, reverse discharge protection to prevent battery drain when input power is removed, and an automatic recharge function that initiates a new cycle if the battery voltage falls below a preset threshold.
Housed in a space-saving 8-pin SOIC package, the MCP73213-A6SI/MF is an ideal solution for a wide array of applications, from power tools and electric bicycles to medical devices and backup systems, where a compact footprint and a fully managed charging process are required.
The MCP73213-A6SI/MF provides a compact, full-featured, and highly efficient charging solution for 2-series Li-Ion/Li-Polymer batteries, integrating critical safety and power management features to simplify design and ensure reliable operation.
Keywords:
1. Linear Charger
2. Dual-Cell Li-Ion
3. Charge Management
4. Input Voltage Regulation
5. Thermal Shutdown
