Цитата(Bludger @ Jul 13 2005, 15:46)
Цитата(ark @ Jul 13 2005, 13:31)
Посоветуйте на чём сделать DC/DC преобразователь 5..20V>12V (0.3A)
Гальваноразвязка не нужна.
На любом бустерном чипе, но с конфинурацией SEPIC. Эта топология позволяет регулировать как вверх, так и вниз, и в ней нету транса - не надо ничего мотать
Ну, насчет
Цитата
...не надо ничего мотать
Вы ошибаетесь, по-видимому
Позволю себе привести цитату:
Цитата
SEPIC topology, which is similar to the flyback, uses a
capacitor to aid in energy transfer from input to output. The SEPIC topology offers the same advantage of the flyback in that it can generate an output voltage that is
greater or less than the input voltage. However, it also offers improved efficiency. Although it requires an
additional capacitor in the power stage, it greatly reduces ripple current in the input capacitor and improves
efficiency by transferring the energy in the leakage inductance of the coupled inductor to the output. This also
provides snubbing for the primary and secondary windings, eliminating the need for RC snubbers. Note that
the capacitor must have low ESR, with sufficient ripple current rating for the application. Another advantage of
the SEPIC is that the inductors do not have to be on the same core.
Посоветуйте на чём сделать DC/DC преобразователь
Jul 13 2005, 09:31
