Hysteretic mode controller for capacitor voltage divider
US7764526B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Mar 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/072
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hysteretic mode controller for controlling a capacitor voltage divider which has a flying capacitor. In one embodiment, the hysteretic mode controller includes an amplifier, a gain circuit and a hysteretic comparator circuit. The amplifier has an input for coupling to the flying capacitor and an output providing a fly voltage. The gain circuit has an input for receiving the input voltage and an output coupled to a reference node providing a reference voltage. The hysteretic comparator circuit has a first input coupled to the output of the amplifier, a second input receiving the reference voltage, and an output for providing a PWM signal to control the capacitor voltage divider. The fly voltage is compared to voltage limits of a hysteretic voltage window for switching the PWM signal. The switching frequency is increased with higher load current to maintain high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.