2006 · 79 citations · 14 references
EngineeringComputer EngineeringElectrical EngineeringLow-power DesignMicroelectronicsPower ElectronicsDc-dc ConversionDc-dc ConvertersFpga ArchitectureLow-power Fpga DesignPower ManagementPulse-width ModulationDigital Control Of Dc-dc ConvertersDigital Control Of Power ConvertersDigital Pulse-width ModulationFpga PrototypingPower ConsumptionPower Management DesignPower-aware Fpga Architecture
A digital controller for dc-dc switching converters used in battery-powered handheld devices is introduced. The controller can operate in two modes and encompasses designs of a digital pulse-width modulator (DPWM) and an all-digital pulse-frequency modulator (DPFM). The DPWM has a high resolution and can operate at very-high constant switching frequency (tens of MHz). The DPFM features very-low power consumption, programmable on-time and control over switching frequency range. An experimental FPGA prototype and an application-specific IC that employ controller architecture are built around 3.3 V, 3W, 6 MHz buck power stage and successful operation of the digital controller in both modes is verified. The low power consumption has been also verified on a chip implemented in a standard CMOS 0.18/spl mu/m process.
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