Digitally controlled switchmode power supply

Details Digitally controlled switchmode power supply Digitally controlled switchmode power supply

1994-04-15

1995-12-12

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

323283, 323284, G05F 1575

Patent

active

054752965

ABSTRACT:
A digitally controlled switchmode power supply by the use of a pulse width modulated (PWM) controlled field effect transistor, switches an inductor between input and output sides to provide a controllable DC output voltage. The digital processor receives and digitizes the input and output voltages and also the current through the associated inductor and derives a PWM control loop signal driving the associated field effect switching device to switch the inductor. The foregoing compensates for nonlinear changes in the value of the inductance due to changes in inductor currents and also avoids resonance at pole points of the LC circuit in the power supply. In addition a change in buck to boost modes may be accomplished automatically depending on input voltage operating conditions.

REFERENCES:
patent: 4356542 (1982-09-01), Bruckner et al.
patent: 4835454 (1989-05-01), White
patent: 5079498 (1992-01-01), Cleasby et al.

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