Voltage converter and power management device including the same
US9531249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2014 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Jun 18, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage converter includes a driving device unit, a current sensing unit and a switching control circuit. The driving device unit charges an input power supply voltage in an inductor, connected between a switching node and an output node, in response to a first driving control signal, and discharges the inductor in response to a second driving control signal. The current sensing unit generates first and second sensing signals based on a first sensed current, a second sensed current, a voltage at the switching node and a ground voltage. The switching control circuit generates the first and second driving control signals by performing a pulse-frequency modulation (PFM) and a pulse-width modulation (PWM) based on a feedback voltage, a reference voltage and the first and second sensing signals. The switching control circuit adaptively adjusts off-time when the switching control circuit performs the PFM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.