Variable Power Write Driver Circuit

A storage drive, comprising:

• a write head recording data on a magnetic media based on a flow of a write current through the write head;
• and
• a write driver circuit including a variable power supply network and a variable power return network driving the write current through the write head based on a selection of an operating power mode among a plurality of selectable power modes of the variable power supply network and the variable power return network,
• wherein each power mode of the variable power supply network and the variable power return network drives the write current with a different magnitude from the variable power supply network through the write head to the variable power return network.

A storage system, comprising:

• a write head recording data on a magnetic media based on a flow of a write current through the write head;
• a write controller;
• and
• a write driver circuit including a variable power supply network and a variable power return network driving the write current through the write head based on a selection by the write controller of an operating power mode among a plurality of selectable power modes of the variable power supply network and the variable power return network,
• wherein each power mode of the variable power supply network and the variable power return network drives the write current with a different magnitude from the variable power supply network through the write head to the variable power return network.