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Measuring the voltage of the power supply chip requires the use of a test tool such as a voltmeter or oscilloscope.
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First, the positive electrode of the voltmeter is touched to the output end of the power chip, and the negative electrode is touched to the ground or power input end.
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Then, the appropriate range is selected to ensure accurate measurement results.
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For chips with high power supply voltage, the voltage division method can be used to measure the voltage division by connecting the series resistors R2 and R3, and then connecting the voltmeter to R2.
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Observe the number of the voltmeter to ensure that the maximum voltage measured does not exceed the maximum range of the voltmeter to ensure the safety of the circuit.
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Finally, the voltage of the power supply chip is calculated according to the voltage representation number.
To measure the voltage of the cold ground chip in the electric vehicle charger, it is first necessary to connect the red pen of the multi-meter to the voltage pin of the chip, and the black pen to the ground pin or negative power pin.
Then set the multimeter to the DC voltage gear, select the appropriate measuring gear according to the specific voltage range, and gently touch the voltage probe of the multimeter to the voltage pin of the chip.
Then reading the display value of the multimeter can get the voltage value of the cold ground chip. Be careful when measuring to ensure that you do not touch other components to avoid short circuits or other accidents.