I am reading a book by L Sivan called Microwave Tube Transmitters, which shows a strange buck converter configuration that Ive not seen before, however the book is from 1994.
It looks the usual as a normal buck converter, but has some kind of input voltage feedforward and uses a second transistor to drive the gate of the first, input buck transistor. It looks as though its therefore a buck converter that uses output voltage feedback and input voltage feedforward to regulate the output voltage. My questions are, what is the purpose of this converter? Are there any benefits at all to using this configuration, compared to the usual buck? I am unsure, as this is the first time I have seen this and believe if there was much benefit then it would be seen more often.
I welcome any comments that would help me understand this converter more, and what benefits it may pose for any application, bonus points for it's use as a pre-regulator for a high voltage inverter. Unfortunately the book introduces the converter but offers little explanation on its performance, application, why it is preferred etc. I have attached an image from my phone of the converter in question.
It looks the usual as a normal buck converter, but has some kind of input voltage feedforward and uses a second transistor to drive the gate of the first, input buck transistor. It looks as though its therefore a buck converter that uses output voltage feedback and input voltage feedforward to regulate the output voltage. My questions are, what is the purpose of this converter? Are there any benefits at all to using this configuration, compared to the usual buck? I am unsure, as this is the first time I have seen this and believe if there was much benefit then it would be seen more often.
I welcome any comments that would help me understand this converter more, and what benefits it may pose for any application, bonus points for it's use as a pre-regulator for a high voltage inverter. Unfortunately the book introduces the converter but offers little explanation on its performance, application, why it is preferred etc. I have attached an image from my phone of the converter in question.
Attachments
-
58 KB Views: 23