In addition to battery voltage detection, MAX1679 also has timeout detection and temperature detection to provide secondary protection for the battery. When temperature detection is required, connect a thermistor between the THERM pin and the BATT_ pin and install the thermistor close to the battery. When the TESL pin is connected to BATT+ ADJ or GND, the corresponding charging limit time is 2.8 hours, 3.75 hours and 6.25 hours. When selecting P1, consider the breakdown voltage between the drain and source, the minimum turn-on threshold voltage, the rated current and the power loss. The breakdown voltage between the drain and source must be at least 25% higher than the wall adapter voltage in the open circuit state.
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