Digital power refers to power supplies with digital power control. In conventional power supplies, the output voltage is controlled in analog mode. With analog power control, load changes are detected by voltage drops and flow into the analog control mechanism. The situation is different with digital power, where power control is handled by a microprocessor. The control characteristics are implemented as algorithms and operate almost instantaneously.
In contrast to analog power control, where the voltage deviation is amplified by an error amplifier and introduced into the control loop as a correction signal by means of pulse width modulation, digital power control uses an A/D converter that digitizes the voltage deviations and converts them into data words.
The advantages of digital power control are better efficiency and optimization of parameters and efficiency during operation by the PoL converters. The control loops can be adapted in their characteristics to the operating conditions. If several power supplies have to be controlled simultaneously, then the digital power management( DPM) takes effect.