Are there special techniques to reduce the package power dissipation when running at high currents?
Use of external Schottky diodes with low Vforward, to clamp the outputs to VBB and ground, will help to reduce the power dissipation in the A3977. Heat sinks are also a possibility, but not as efficient. Note: When using external diodes, synchronous rectification should be disabled to achieve maximum results. For additional information, please refer to the following on the Allegro website: “Power Drive Circuits” at http://www.allegromicro.com/en/Products/Design/an/AN295048.pdf.
