Maxim’s MAX17435 and MAX17535 multichemistry battery charger ICs are designed to simplify construction of accurate and efficient chargers. They provide SMBus-programmable charge current, charge voltage, input current limit, relearn voltage and digital readback of the IINP voltage.
The devices utilise a charge pump to control the adapter selection n-channel MOSFETs when the adapter is present. When the adapter is absent, the charge pump is shut down and a p-channel MOSFET selects the battery. The ICs provide up to 7 A of charge current to two, three or four lithium-ion (Li+) cells in series. The charge current and input current-limit sense amplifiers have low offset errors and can use 10 m sense resistors.
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