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Switching Power Supply Factory Direct
An adapter is an interface converter, which can be a stand-alone hardware interface device that allows hardware or electronic interfaces to be connected to other hardware or electronic interfaces, or it can be an information interface. Examples include: power adapters, tripod base adapter...
Description
When it comes to fast charging, the key is to determine the current that the battery can handle based on the battery manufacturer's specifications. For example, the battery's "C-rate" specifies the maximum current at which the battery can be charged and discharged. Standard C-rates typically range from 0.5C to 3C, depending on the specific battery used, and there is often a trade-off between higher C-rates and lower energy density. For example, a C-rate of 1C for a 3000mAh battery means that the battery can be charged at a maximum current of 3A. Often, battery manufacturers will also specify different voltage and temperature ranges for the C-rate, with the C-rate decreasing at lower voltages or higher/lower temperatures. If a battery has a higher C-rate, it can handle more current and charge faster. For example, a higher C-rate battery is more useful for portable devices such as smartphones and laptops, which may need to be recharged at least once a day, than for wireless speakers. Often fast charging is definitely preferred for devices that have short run times and require constant use. Understanding the C-rate of the battery can help designers determine how to optimize their solution, enabling them to select the charger IC topology and safety features that are best suited for their battery. The constant current (CC) charging phase (also known as the fast charging phase) is typically dependent on the battery's voltage threshold. the MP2731 is unique in that it defines its fast charging phase as the time interval during which the battery voltage exceeds the pre-charge threshold and is less than its constant voltage charging threshold. During the first fast charge phase, the battery FET charges the battery with a fast charge stream. Once the battery voltage exceeds the new threshold, the battery FET is considered fully energized.
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