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TDA7294 High-efficiency Version, +/- 20-volt supply

Question asked by whitney.james on Jul 3, 2014
Latest reply on Jul 3, 2014 by zhao.yuntao
I had a question of the best way to implement the supplemental +/- 20 VDC *supplemental* supply (i.e., not the +/- 40 VDC main supply). My 40 VDC supply is unregulated. Two thoughts were to use a voltage divider (off of the +/- 40 VDC supply), or even a high-current regulator on the +/- 40 VDC supply. If a voltage divider is acceptable, what is the  best way to minimize the static/idling current when the additional power isn't required ?

Thank you,

Mr. Amalfi