Alpha and Omega Semiconductor has been granted a patent for a controller in a switching regulator that efficiently manages output voltage levels. The controller activates buck and boost circuits to adjust voltage values based on commands, allowing for controlled decay of output voltage while recycling stored charges. GlobalData’s report on Alpha and Omega Semiconductor gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Alpha and Omega Semiconductor, Under-screen biometric identification was a key innovation area identified from patents. Alpha and Omega Semiconductor's grant share as of January 2024 was 79%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for a switching regulator controller with buck and boost circuits
A recently granted patent (Publication Number: US11876456B2) discloses a controller for a switching regulator designed to efficiently manage power delivery to a load. The controller includes a buck control circuit that generates a pulse width modulation (PWM) signal to regulate the output voltage to a specific level lower than the input voltage. Additionally, a boost control circuit is activated to return stored charges from the output capacitor to the input node, decreasing the regulated output voltage further. The controller can switch between these modes in response to commands, such as a decay command, to adjust the output voltage accordingly. During a charge recycle period, the controller provides a status indicator to indicate the regulator is in a decay state, even though it is actively performing charge recycling.
Furthermore, the controller features error amplifiers to monitor feedback voltage and current sense signals, enabling precise control over the power stages. The multi-phase controller generates multiple PWM signals to drive various power stages, each responsible for delivering phase currents to the output node. The PWM signals include up-ramp and down-ramp portions to manage energy flow between the input and output nodes effectively. By controlling the upper and lower power switches in the power stage, the controller can regulate the output voltage to desired levels, ensuring efficient power delivery to the load. Additionally, the controller can store incoming commands during the charge recycle period and operate the switching regulator based on these commands once the period is complete.
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