Digital flash charger controller
US8446129B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Feb 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33515
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital flash charger controller includes a transformer, a power supply element, and an application-specific integrated circuit (ASIC). A secondary side of the transformer is electrically connected to an energy storage device, and the power supply element is used to supply an electric power to a primary side of the transformer. The ASIC outputs a pulse-width-modulation (PWM) signal to control whether the electric power is input to the primary side, and the ASIC converts a sensing signal generated at the secondary side of the transformer to a digital signal, and tracks a sensing negative edge of the sensing signal according to the digital signal to adjust a cutoff time of the PWM signal, such that the next pulse positive edge approaches the corresponding sensing negative edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.