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What is the purpose of the Schottky diodes?

April 26, 2017Diodes purpose schottky

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What is the purpose of the Schottky diodes?

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The Schottky diodes protect the LM4652 from fly back voltages. The output filter contains inductors (L1) and driving a real work load speaker also has inductance. These inductors cause fly back voltages. If the fly back voltage is too high the LM4652 will be permanently damaged. The diodes also help clamp the output square waveform to have less overshoot. The recommended value for the Schottky diodes is 50 Volts and 3 Amps or 50 Volts and 1Amp with a high surge current (>20A) rating.