关键词: load switching, rechargeable battery-powered systems, Li+ battery chargers, power OK (POK) outputs
Abstract: Two circuits are described. The first uses external MOSFETs driven by the Power OK (POK) output of a Li-cell charger IC (MAX8814), to switch a load between battery and charging source without intervention from a microcontroller or system software. For charger ICs without a POK output (such as the MAX1507), the second circuit does the same switching using MOSFETs and a comparator (MAX920).
Battery Charger Load Switch Approximates Ideal Diode.pdf
STM32
MCU
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