Abstract: The present disclosure discloses a power control device and a power control method. The power control device comprises: a power conversion unit having a primary circuit and a secondary circuit connected through a transformer, the power conversion unit configured to receive an AC input voltage of an AC power source and convert the AC input voltage into an output voltage for a load; and a control unit configured to control an actual output power not to exceed a maximum power limit according to a temperature signal and an input voltage signal, wherein the maximum power limit is the smaller one between a first maximum power value and a second maximum power value, and the first maximum power value is associated with the temperature signal and the second maximum power value is associated with the input voltage signal.

Abstract: A hybrid flyback circuit is provided and includes an upper switch, a lower switch, a transformer, a resonant circuit, a current sampling circuit and a control unit. The control unit includes an output voltage feedback unit, a peak current comparison unit controlling the upper switch to turn off when a sampling voltage corresponding to the current sampling signal is equal to the first voltage feedback signal, a first dead time delay unit controlling the lower switch to turn on after a first dead time starting from the turn-off time of the upper switch, a negative peak current feedback unit for generating a second voltage feedback signal, a conduction control unit controlling the lower switch to turn off, and a second dead time delay unit controlling the upper switch to turn on after a second dead time starting from the turn-off time of the lower switch.

Abstract: A hybrid flyback circuit is provided and includes an upper switch, a lower switch, a transformer, a resonant circuit, a current sampling circuit and a control unit. The control unit includes an output voltage feedback unit, a peak current comparison unit controlling the upper switch to turn off when a sampling voltage corresponding to the current sampling signal is equal to the first voltage feedback signal, a first dead time delay unit controlling the lower switch to turn on after a first dead time starting from the turn-off time of the upper switch, a negative peak current feedback unit for generating a second voltage feedback signal, a conduction control unit controlling the lower switch to turn off, and a second dead time delay unit controlling the upper switch to turn on after a second dead time starting from the turn-off time of the lower switch.