Quote:
Originally Posted by NiHaoMike
How about have the switching regulator operate as both a PFC and a charger?
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From what I understand, in order for the load to appear resistive at the input while the output current is constant, the input and output need to be decoupled. Hence, one stage to create a 'resistive' load and another stage to output constant current with a capacitor in between.
Arguably, the output current does not necessarily need to be constant for a lead acid battery charger, so I'm sure it can be done. In fact, there are many ways to solve the battery-charger problem, from a handful of extension cords and a rectifier to a full blown PFC stage/buck mode charger, or maybe some other super complicated method. Each has its advantages and disadvantages.
So far, despite the recent setbacks, I've enjoyed the challenge of a micro controlled buck mode charger and think it'll provide the best combination of performance in terms of power, efficiency, flexibility, and battery care. If PF is too low, that's another fun problem to solve. But, by no means do I suggest it's the best solution for everyone...