Buck converter with operating mode automatically determined by t

Details Buck converter with operating mode automatically determined by t Buck converter with operating mode automatically determined by t

1994-10-20

1997-04-01

Nguyen, Matthew V.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323282, G05F 156

Patent

active

056170165

ABSTRACT:
A DC-to-DC (buck) converter comprises a PWM regulation loop and a hysteretic control loop, which are alternatively enabled by a mode selection circuit of the converter in function of the load level. When the level of load drops below a preset limit related to a design load level, the converter passes from a PWM control mode to a hysteretic control mode, thus eliminating switching losses during periods of operation at relatively low load level.

REFERENCES:
patent: 4866367 (1989-09-01), Ridley et al.
patent: 4885674 (1989-12-01), Varga et al.
patent: 5029269 (1991-07-01), Elliott et al.
patent: 5247239 (1993-09-01), Yamamura et al.
patent: 5475296 (1995-12-01), Vinsant et al.
patent: 5477132 (1995-12-01), Canter et al.

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