The MAX1874ETE+ is a dual-input, USB/AC adapter, 1-cell Li+ charger with OVP and thermal regulation. in 16 pin TQFN package. It includes battery to input power switchover, the system can be powered directly from the power source rather than battery. The device has an active-low CHG output to indicate when battery current tapers below a predetermined level. DC power-OK (active-low DCOK), USB power-OK (active-low UOK) and power-on (PON) outputs indicate when valid power is present. These outputs drive logic or power-selection MOSFETs to disconnect the charging sources from the load and protect the MAX1874 from overvoltage.
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