Looking for the simplest design with safety built-
The image on the left is based on one of the application schematics taken from the
manufacturer’s (Texas) data-
The values 3K9 and 82R conveniently produce an output of nominally 60V off-
The TIP112 is a power Darlington capable of sinking 2A, so there is now plenty of ‘headroom’.
This regulator is fed from a conventional transformer / bridge circuit with smoothing pack.