I need to get 12 V DC from a high voltage source. The high voltage comes from a wind turbine. The voltage level changes randomly according to the wind speed. Its voltage can go up to 250 V DC. This 12 V DC will be used to run the control circuits at the start-up only; the main power will be supplied from an integrated SMPS unit as soon as the overall system starts working.

I designed the following circuit for this purpose:

![enter image description here](https://i.stack.imgur.com/uxKLo.png)

I thought that directly dropping 250 V to 12 V would be risky and make the system unstable, so I decided to drop it down to an intermediate voltage level (i.e.; 60 V) first.

Is there a better (and as simple as this) way of doing this?