Article 5: Application and selection techniques of low dropout Schottky diodes in fast charging power supplies

Schottky diodes are almost a standard component in PD fast charging, QC fast charging, and low-voltage high current power supply solutions. Compared to traditional rectifiers, Schott's low forward voltage drop at the base can significantly reduce power supply temperature rise, improve conversion efficiency, and solve the problems of fast charging heating and voltage drop losses. diode

Key points for selecting fast charging circuits:

1. Prioritize the low voltage drop VF model, the lower the full load drop, the less heat generated;

2. For high current output circuits, sufficient current margin must be reserved to prevent aging caused by long-term operation at full load;

3. High frequency switch circuits should prioritize the use of surface mounted Schottky diodes with good high-frequency characteristics, suitable for high-speed rectification scenarios.

Applicable products: mobile phone fast charging head, power bank power board, car fast charging, multi port adapter, small switch power supply.

Mass production design suggestion: The output terminal of the fast charging power supply should be rectified, and SS and SR series surface mount Schottky diodes should be preferred. They are small in size, high in efficiency, suitable for automated surface mount production, and suitable for large-scale production. diode