Electric vehicles, large-scale battery storage stacks, home automation, industrial, and telecom power all require converting high voltages to ±12V, where dual polarity rails are required for powering amplifiers, sensors, data converters, and industrial process controllers.
One challenge in all these systems is creating a compact, efficient dual-polarity regulator that can operate over a temperature range of –40°C to +125°C, especially important in automotive and other high ambient temperature applications.
This article from Analog Devices presents two elegant circuits that generate ±12V outputs from a wide 30V to 400V input voltage range, both using a single high voltage LT8315 converter. One circuit is an isolated flyback topology; the other is based on a non-isolated buck topology.
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