Aluminum Electrolytic Capacitor and Tantalum Electrolytic Capacitor (I)

Circuit design:

Aluminum electrolytic capacitors are divided into positive and negative electrodes. Reverse voltage and AC voltage must not be applied. Non-polar capacitors should be used where reverse voltage may occur.

For places where fast charging and discharging are required, aluminum electrolytic capacitors should not be used, and specially designed capacitors with a long life should be selected.

Overload voltage should not be used:

1. The peak voltage after superposition of DC voltage and ripple voltage is lower than the rated value.

2. When two or more electrolytic capacitors are connected in series, consider using a balanced resistor so that the voltage across each capacitor is within its rated range.

When designing the circuit board, it should be noted that there should be no lines on the upper end of the capacitor and the explosion-proof valve, and a clearance of more than 2 mm should be left.

Electrolysis is also the main chemical solvent and electrolytic paper are flammable, and the electrolyte is conductive. When the electrolyte comes into contact with the pc board, the wiring on the pc board may be corroded. So that they smoke or catch fire. Therefore there should be no lines under the electrolytic capacitor.

Design the circuit board to the back to confirm that the heating components are not close to the aluminum electrolytic capacitor or electrolytic capacitor.