US 2014/0111170 A1 · BOOST CONVERTER CONTROL

Abstract

Simple and efficient techniques for closed loop control of a boost converter. In an aspect, a current feed-forward (CFF) mode of operation includes providing current information to a control logic block controlling transistor switches of the boost converter to advantageously smooth the signals present in the closed loop control of the system. In another aspect, a modified peak current (MPC) mode of operation includes providing a simplified control mechanism based on a peak current mode of operation. Both CFF mode and MPC mode may share similar circuit elements, allowing a single implementation to selectively implement either of these modes of control. Further techniques are provided for determining average current information for the logic block.

Claims20

Dependent claims

An apparatus comprising:

a control logic block configured to control low-side and high-side switches coupled to an inductor, wherein:
the high-side switch is controlled to selectively couple the inductor to an output voltage coupled to a load and a storage capacitor;
the low-side switch is controlled to selectively couple the inductor to a ground voltage;
and
the control logic block is configured to control the switches based on inputs comprising a function of the output voltage and a function of current through the low-side switch.

2 more elements

Dependencies are inferred from the claim text.

Boost converter control

Life of this patent

Boost converter control

Life of this patent

Abstract

Claims20