Отправлено Гена 06 февраля 2002 г. 17:10 В ответ на: Ответ: отправлено Bludger 06 февраля 2002 г. 16:42

Это ЧИМ контроллер.
However, unlike traditional PFM
converters, switching is controlled by the combination
of a switch current limit (210mV/RSENSE) and
on-time/off-time limits set by one-shots. Once turned
on, the MOSFET stays on until:
1) the 16µs maximum on-time limit is reached
or
2) the switch current reaches its limit (as set by the
current-sense resistor).
Once off, the switch is typically held off for a minimum of
2.3µs. It will stay off until the output drops below the level
determined by VREF and the feedback divider network.

• Ответ: — Bludger   (06.02.2002 19:06, 265 байт)