Multi-channel interleaved power converter with current sharing
US6534960B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2002 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jun 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1584
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-channel interleaved power converter includes first and second per-channel conversion circuits, each including a pulse width modulator (PWM), a driver PWM, an output inductor carrying load current, and a current controlled current source (CCCS) coupled to sense the inductor current. The inductors of the different channels are coupled in common to an output node of the power converter. Summing circuitry is operative (i) to subtract the output current of the second channel CCCS from the output current of the first channel CCCS, (ii) to convert the difference current into an offset, and (iii) to apply the offset to a first PWM control signal to generate a second PWM control signal for the second channel. The PWM control signals cause respective currents to be established in the inductors of the different channels according to a predetermined desired current relationship, such as equality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.