Adjusting peak inductor current to limit supply input current

An apparatus comprising:

• a boost converter having a power supply input for receiving an input power supply voltage of a power supply, an inductor, and an output for generating an output voltage greater than the input power supply voltage;
• and
• a controller configured to:
• monitor the input power supply voltage;
• monitor the inductance of the inductor;
• monitor one or more other characteristics of the boost converter;
• calculate a target peak inductor current based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a target average current of the inductor during a switching cycle of the boost converter;
• and
• reduce the target peak inductor current in a controllable manner and cease regulation of the output voltage of the boost converter responsive to the input power supply voltage falling below a threshold voltage.

A method comprising:

• monitoring an input power supply voltage of a power supply;
• monitoring an inductance of an inductor of a boost converter comprising the inductor;
• monitoring one or more other characteristics of the boost converter;
• calculating an average current of the inductor during a switching cycle of the boost converter based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a peak inductor current of the inductor;
• and
• reducing the average current in a controllable manner and ceasing regulation of an output voltage of the boost converter responsive to the input power supply voltage falling below a threshold voltage.

An apparatus comprising:

• a boost converter having a power supply input for receiving an input power supply voltage of a power supply, an inductor, and an output for generating an output voltage greater than the input power supply voltage;
• and
• a controller configured to:
• monitor the input power supply voltage;
• monitor the inductance of the inductor;
• monitor one or more other characteristics of the boost converter;
• calculate an average current of the inductor during a switching cycle of the boost converter based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a peak inductor current of the inductor;
• and
• reduce average current in a controllable manner and cease regulation of the output voltage of the boost converter responsive to the input power supply voltage falling below a threshold voltage.