Switching DC-to-DC converter and conversion method with current sharing between paralleled channels
US6137274A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2000 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Feb 2, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J1/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-to-DC converter having multiple power delivery channels, and including a current-sharing switching controller implemented as an integrated circuit, multi-channel circuitry (including parallel channels connected to one output node) external to the controller chip, and current sharing circuitry (including circuitry external to the controller chip and circuitry including current mirrors internal to the controller chip), and methods for generating PWM power switch control signals for use in (and performing DC-to-DC conversion using) such a DC-to-DC converter. Preferably, the current sharing circuitry generates individual channel current signals from voltage analogs thereof produced external to the controller chip, and superposes the individual channel current signals to produce an average current signal. Channel current error signals are generated by subtracting the individual channel current signals from the average current signal. The power switch control signal for each channel is generated in response to the channel current error signal for the appropriate channel and a feedback signal (an output voltage error signal) indicative of the output potential of the DC-to-DC converte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.