Review
With the rapid development of portable products, the use of various batteries has increased greatly. Beineng International Co., Ltd. has introduced a portable lithium battery pack charging management fast charging reference design. This reference design uses Microchip's MCP19118 as the control chip, Infineon's 5th generation OpTIMOS for power conversion, fast and high current charge management for portable lithium battery packs, fewer peripheral components, high electrical conversion efficiency, low ripple current, and protection functions. perfect.
The control chip MCP19118 is a digital enhanced power analog controller with synchronous driver. It integrates an analog PWM controller and an 8-bit MCU. It has the fast dynamic response of analog devices, as well as flexible charging curves and various functions. The 5th generation OpTIMOS has a smaller Rdson, a smaller parasitic capacitance, and a smaller Trr of the parasitic diode. It is more suitable for high-frequency PWM power conversion circuits, which greatly contributes to the improvement of overall performance.
Block diagram:
? High-current charge management for multi-cell series lithium batteries
? In standby mode, the output voltage can be supplied, and the battery pack can determine whether the charger is suitable.
? Plug in the battery, no inrush current, the charger automatically detects the battery and automatically starts charging
? Can achieve a variety of protection functions, such as input voltage undervoltage and overvoltage protection, output overcurrent protection, temperature protection, etc.
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