Fundamentals of MC13892 charger operation
Keywords:CCCV charger? battery? discharging?
The MC13892 incorporates a classic linear type CCCV charger, with two or three external MOSFETs and two sensing resistors. The charger provides a total current, which is shared between the system and the battery. Higher system consumption current leads to lower battery charging current, hence longer charging completion time. In extreme cases when the system consumption current is larger than the total current, the battery will supply the rest of the current, beyond what the charger can provide. Thus, the battery is actually discharging.
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Originally published by Freescale Semiconductor Inc. at www.freescale.com as "MC13892 Charger Operation".
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