Patent ID: 8004122

Claim:
A power converter controller operable to control power provided to a load circuit coupled between a first voltage supply terminal and a first switching element by controlling the first switching element and to control power provided to an energy storage element coupled to the first switching element, the energy storage element being operable to provide a power supply, comprising: a first control terminal for coupling to a control input of the first switching element; a first load terminal coupled to the first switching element and the charge storing element; a second switching element coupled between the first load terminal and a second voltage supply terminal; and timing logic operable to selectively provide a control signal at the first control terminal to control the first switching element and to selectively control the second switching element to supply power to the load circuit during a load powering phase by enabling the first and second switching elements, charge the energy storage element during a bootstrap charging phase by enabling the first switching element and disabling the second switching element, and allowing the load circuit to operate in isolation during a passive phase by disabling at least the first switching element, wherein the timing logic comprises a first latch coupled to enable the first switching element and a second latch operable to enable the second switching element.