Balanced auxiliary on time generator for multiphase stackable constant on time control architecture
US8810294B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2013 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Oct 10, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45475
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit configured to control a switching power supply including a ramp generator configured to generate a triangular waveform. A comparator is configured to generate a series of pulse width modulated (PWM) pulses at a first frequency and to regulate the switching power supply. The ramp generator includes a capacitor, a charging current source configured to provide a charging current to charge the capacitor, and a discharging current source configured to provide a discharging current to discharge the capacitor. The ramp generator also includes a closed loop current balancing current source configured to balance the currents from the charging and discharging current sources to establish a substantially zero direct current (DC) bias across the capacitor. The controller also includes a multi-phase configuration to provide a stackable multi-channel architecture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.