ROHM has been granted a patent for a buck DC/DC converter controller and method. The technology involves a pulse modulator and overcurrent detection circuit to efficiently modulate the converter’s output. The controller ensures optimal operation by adjusting the control pulse based on the pulse modulation signal and overcurrent detection. GlobalData’s report on ROHM 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 ROHM, Under-screen biometric identification was a key innovation area identified from patents. ROHM's grant share as of May 2024 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
Controller for buck dc/dc converter with overcurrent protection
A recently granted patent (Publication Number: US12003181B2) discloses a controller designed for a synchronous rectification type buck DC/DC converter, featuring a pulse modulator, overcurrent detection circuit, switch control circuit, and driver circuit. The controller operates in two modes, adjusting the control pulse based on the pulse modulation signal and overcurrent detection signal. In the first mode, the control pulse aligns with the pulse modulation signal, while in the second mode, it shifts based on the overcurrent detection signal, maintaining a fixed on time after the overcurrent signal is negated. The controller's design includes a timer circuit to measure the fixed on time, ensuring efficient operation of the buck DC/DC converter.
Furthermore, the patent also covers a controlling method for the synchronous rectification type buck DC/DC converter, outlining the steps of generating a pulse modulation signal, comparing low-side current for overcurrent detection, generating a control pulse, and driving the high-side and low-side transistors accordingly. The method emphasizes adjusting the control pulse based on the pulse modulation signal and overcurrent detection signal, with the fixed on time inversely proportional to the voltage difference of the converter. This method aims to optimize the performance of the buck DC/DC converter by efficiently managing the switching of transistors based on the input and output voltages, ensuring stable and reliable operation in various electronic devices integrating this technology.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
