Fuse-less self-start controller
US11336270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Aug 28, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0072
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital self-start controller, which is functional without fuse and/or trim information. The self-start controller protects a DC-DC converter against large inrush currents and voltage overshoots, while being capable of following a variable VID (voltage identification) reference ramp imposed by the system. The self-start controller uses a relaxation oscillator to set the switching frequency of the DC-DC converter. The oscillator can be initialized using either a clock or current reference to be close to a desired operating frequency. The output of the DC-DC converter is coupled weakly to the oscillator to set the duty cycle for closed loop operation. The controller is naturally biased such that the output supply voltage is always slightly higher than a set point, eliminating the need for any process, voltage, and/or temperature (PVT) imposed trims.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.