To measure the quality of the 3868 power management chip, the following steps can be carried out:
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1. Measure the input voltage: Use a multimeter to measure whether the input voltage of the power chip meets the specified range. Typically, this range is between 2V and 24V.
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2. Measure the output voltage: Use a multimeter to measure whether the output voltage of the power chip meets the specified range. Different power supply chips may have different output voltages, and you need to check their specifications to determine the range.
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3. Check the overload protection function: increase the load and observe whether the power chip can work normally and does not exceed the rated current. If the chip automatically disables protection, the overload protection function is normal.
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4. Check the undervoltage protection function: Reduce the input voltage and observe whether the power chip can work normally. If the chip protection is disabled, the undervoltage protection function is normal.
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5. Check the thermal protection function: heat the chip and observe whether the power chip is turned off. If the chip automatically disables protection, the thermal protection function is normal.
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6. Check the startup time: Start the chip and observe whether the startup time of the chip complies with the specified time. If the chip starts within the specified time, the startup time is normal.
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7. Check other functions: According to the specifications, check whether the functions of other power chips are normal, such as overvoltage protection and overcurrent protection.
Measure the resistance of each foot to the ground, and then use a new comparison, good or bad at a glance