breta1 píše:.....Obvod se nenapájí přes PINC, to je regulace zpětné vazby, obvod se v prvopočátku napájí přímo z PIN V.
V prvopočiatku asi z D-pinu, a potom z C. Ako by to fungovalo z V v trojvývodovom zapojení?
edit: našiel som ako sa to napája
CONTROL (C) Pin Operation
The CONTROL pin is a low impedance node that is capable of
receiving a combined supply and feedback current. During
normal operation, a shunt regulator is used to separate the
feedback signal from the supply current.
CONTROL pin voltage
VC is the supply voltage for the control circuitry including the
MOSFET gate driver. An external bypass capacitor closely
connected between the CONTROL and SOURCE pins is
required to supply the instantaneous gate drive current. The
total amount of capacitance connected to this pin also sets the
auto-restart timing as well as control loop compensation.
When rectified DC high voltage is applied to the DRAIN pin
during start-up, the MOSFET is initially off, and the CONTROL
pin capacitor is charged through a switched high voltage ....