Back to results
US 2022/0190811 A1Published application
Extending On-Time for Power Converter Control
AssigneeSilanna Asia Pte Ltd
InventorsRobert Eric Fesler, William E. Rader, III, Yashovardhan R. Potlapalli
Life of this patent
Estimating the term…
Abstract
A power transistor is switched on and off with an on-time that is held constant and an off-time that is varied. When the off-time is detected to be less than a threshold value that is greater than a minimum off-time limit, the on-time is extended. Then the power transistor is switched on and off with the extended on-time that is held constant and the off-time that varies.
Claims20
A method comprising:
- switching a power transistor on and off with an on-time that is held constant and an off-time that is varied;
- causing an extension of the on-time before the off-time reaches a minimum off-time limit in response to the off-time being less than a threshold value;
- and
- switching the power transistor on and off with an extended on-time that is held constant and the off-time that is varied.
1 more element
An electronic circuit comprising:
- a power transistor that is turned on for an on-time and off for an off-time by a pulse width modulated (PWM) signal;
- a PWM signal generator that generates the PWM signal by holding the on-time constant and varying the off-time;
- an on-time adjusting circuit that causes an extension of the on-time before the off-time reaches a minimum off-time limit in response to the off-time being less than a threshold value.
Dependencies are inferred from the claim text.