Cirrus Logic Inc.

Dialog Semiconductor (uk) Limited

Chanchal Gupta

Pietro Gallina

Siddharth Maru

Vivek Parasuram

Abhishek Ray

Graeme G Mackay

Mark Mercer

Ivan Perry

Hasnain Akram

Sabin Eftimie

Karthik Jayaraman

Kevin Dowdy

Vivek Bhan

Rosario Pagano

Shashank Alevoor

Bryan Quinones

Gregory Fattig

Bryan Mccoy

Techniques for measuring average inductor charging current in a switched-power circuit avoid incurring measurement delay or a requirement of a complex filter. An inductor charging current measurement circuit coupled to a power output stage of the switched-power circuit measures an average charging current in an inductor of the switched-power circuit using pair of capacitors to sample an output voltage of the power output stage at different cycle times of an inductor current waveform. The measurement circuit includes a switch that connects the pair of capacitors together to provide a measurement indicative of the average inductor charging current by sharing charge between the first capacitor and the second capacitor to provide the measurement voltage. The provided measurement voltage is indicative of an average of an estimated peak and an estimated valley of the inductor current waveform, which may be used to make determinations regarding a magnitude of the load current.

Average inductor charging current measurement in a switched-mode power supply using switched-capacitor charge sharing

A power converter system for converting an input voltage at an input into an output voltage at an output may comprise a switch network comprising a reactive circuit element and a plurality of switches, switch control circuitry configured to operate the plurality of switch in a plurality of periodic, sequential states to regulate the output voltage, and reference current generating circuitry. The reference current generating circuitry may include a comparator coupled to a sensed switch of the plurality of switches and configured to compare a current flowing through the sensed switch to a reference current and current-steering circuitry coupled to the comparator configured to generate the reference current and alternate the reference current between a first reference current and a second reference current whenever the switch control circuitry changes from one state of the plurality of periodic, sequential states to another state of the plurality of periodic, sequential states.

Delta-based current steering for power converter peak/valley current control

A method may include, when in a low-power mode of a power converter, monitoring an output voltage of the power converter; comparing, with a single comparator, the output voltage to a first threshold voltage and cause the power converter to enter a magnetization phase of the low-power mode responsive to the output voltage falling below the first threshold voltage; and during the magnetization phase and a demagnetization phase of the low-power mode, comparing, with the single comparator, the output voltage to a second threshold voltage lower than the first threshold voltage and cause the power converter to enter the high-power mode responsive to the output voltage falling below the second threshold voltage.

Pulse frequency modulation regulation and exit scheme using single comparator for power converter

The controller for a system including a power converter may be configured to cause the system to operate in one of a low-power mode and the high-power mode based on power demand from a load at the output of the power converter and when in the low-power mode, monitor the output of the power converter to detect an occurrence of a load transient from the load and in response to detecting the occurrence of the load transient, transition from the low-power mode to the high-power mode via a transition mode to minimize undershoot and overshoot of the output voltage.

Smooth transition between power modes in a power converter

Methods and systems are disclosed for protecting a host device from one or more power surges transmitted from a sink device. When a sink device is detected as being connected to the host device, a limited level of power is provided to the sink device over a power transmission line and the sink device is authenticated. A normal level of power is provided to the sink device only if the authentication is successful, otherwise a reduced level of power is provided.

Method and apparatus for high voltage protection

A two-stage power converter includes a dual-level driver to control a current conducted by a switch transistor in a charge pump to control the charging of a flying capacitor in the charge pump.

Transient response optimization for charge-pump-based two-stage power converter

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Chandler, AZ, United States of America

Chanchal Gupta