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Using the MCP1631 family to develop low-cost battery chargers

Posted: 04 Feb 2008 ?? ?Print Version ?Bookmark and Share

Keywords:battery charger? power management? MCP1631?

As portable rechargeable applications continue to grow, there is an increase in demand for unique or custom battery charger designs. In addition to the increase in portable rechargeable applications, battery chemistry continues to improve and with that new charge methods and profiles are emerging. This all leads to the increase in demand for new or custom charge profile designs. In this application note, a mixed signal multi-chemistry battery charger design technique will be discussed that can accommodate the changing portable power management world.

The reliability and safety concerns with charging batteries can also benefit from programmable mixed signal designs. Charge rates and constant voltage levels can be updated in the field with a change in firmware. This allows the user to adapt to new smart battery packs and select desired runtime versus cycle life. By charging the battery to a lower constant voltage, the run time is shortened but the number of charge cycles will increase.

Another programmable battery charger feature is its ability to charge multi-chemistry battery packs. By detecting the number of cells and cell chemistry, a programmable charger can adapt to a new battery pack. This enables customers to choose between portability, runtime and cost when purchasing a portable system.

View the PDF document for more information.

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