Overview:
With the increasing popularity of portable devices such as smartphones, tablets and camcorders, there is a growing demand for power requirements and the ability to use these devices while charging. Higher power requirements increase the demand for batteries with high power density and excellent charging capabilities. Currently, lithium-ion (Li-ion) batteries and lithium-ion (Li-po) batteries are best suited to current market requirements for power density, charging capacity and price. However, unlike other popular battery technologies such as lead acid and nickel hydrogen, the performance of lithium battery technology is also the most unstable: if the lithium battery is not properly managed, it will result in long charging time, high power dissipation, low efficiency and battery. Life expectancy is lower than average life.
Traditional chargers are relatively simple, and these chargers perform better in low power applications. However, they do not effectively adapt to changes in the charging curve, such as switching between different power sources or operating the device during charging. In addition, conventional chargers are generally less efficient and consume more power in high power and high current applications.
New linear and switching chargers, such as the MP2600 series from Core Source Systems (MPS), use power path management technology to change the charging curve to more efficiently power the battery/system with lower dissipated power. At the same time, these chargers also increase the safety of the system and the life of the battery.
There are many types of power management topologies. This article focuses on the following three types: battery feed, automatic selection, and dynamic power path.
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