Switching power supply device, AC power supply device, and image forming apparatus
US8947058B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2012 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Apr 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A switching power supply device includes a switching power supply integrated circuit that includes a dead time generating unit that generates high-side and low-side drive signals having a dead time based on a PWM signal, a drive signal generating unit that generates first and second PWM signals based on the drive signals and a voltage of an output terminal, and a driver that includes high-side and low-side switch elements driven by the PWM signals; a filter that is connected to the output terminal; a first diode having a cathode connected to the source of the high-side switch element and an anode connected to the output terminal; and a second diode having a cathode connected to the source of the low-side switch element and an anode connected to the output terminal. The first and second diodes are arranged outside the switching power supply integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.