A step-up amount detection unit (103) detects a step-up amount of an inductor (L11).

Boost converters, power supply apparatuses, electrical energy boost methods and electrical energy supply methods are described.

A method for DC/DC conversion comprises operating in a Boost mode of operation or in a Buck-Boost mode of operation.

An operation amplifier (113) of a control unit (106) compares the step-up amount detected by the step-up amount detection unit (103) to a reference voltage (ES12).

A first drive circuit boosts the voltage of the first kick node so as to generate a first boost voltage in the first boost node.

A power feeding coil (21) couples with a first booster coil (coils (11, 13)) and a second booster coil (coils (12, 14)) through an electromagnetic field.

Also, a capacitor (222) coupled to the common node increases the voltage at the common node from an initial boost voltage to a final boost voltage.

The coupler chain couples the boost unit to the DC/DC converter.

To provide a sufficient but not excessive level of boosting, the amount of boosting can be set based on a data state of the unselected storage element.

A temperature range usable for boosting being expanded.

A system, method and apparatus for controlling boost and buck-boost converters using input- output linearization and leading-edge modulation is provided.

An induction heating apparatus that can halt the heating so as to prevent the output voltages of boosting and power-factor improving circuits from being excessively boosted.

Accordingly, the booster circuit can generate the boost voltage in a short time.

For this, the first boost voltage can be surely matched with the target voltage.

An inductor is used to provide further regulation, either further boost or buck.