Output voltage ripple control for a DC-DC power converter
US8916764B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 5, 2011 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Sep 28, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An output ripple voltage average amplitude of a switch mode DC-DC converter is dynamically maintained. The converter has a switch and an output filter. By varying a switching period (TPERIOD) of the switch, VRIPPLE is maintained at a substantially constant value over a first range of converter input voltages and a second range of switch duty cycles. Where the output filter includes an inductor having inductance (L) and a capacitor having capacitance (C) the average amplitude of VRIPPLE is dynamically maintained by varying TPERIOD with respect to switch duty cycle (D) and input voltage (VIN) so as to approximately satisfy the following relationship: TPERIOD=(VRIPPLE*8*L*C)0.5/(VIN*(D−D2)).5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.