Programmable soft start of buck-boost converter
US11658574B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2021 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | May 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An IC controller for a USB Type-C device includes a register that is programmable to store a pulse width and a frequency. A buck-boost converter of the controller includes a first high-side switch and a second high-side switch. Control logic is coupled to the register and gates of the first/second high-side switches. To perform a soft start in one of buck mode or boost mode, the control logic: causes the second high-side switch to operate in diode mode; retrieves values of the pulse width and the frequency from the register; causes the first high-side switch to turn on using pulses having the pulse width and at the frequency; detects an output voltage at the output terminal of the buck-boost converter that exceeds a threshold value; and in response to the detection, transfers control of the buck-boost converter to an error amplifier loop coupled to the control logic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.