DYNAMIC FREQUENCY SCALING OF A SWITCHED MODE POWER SUPPLY

• Main Authors: SHEN, CHING CHANG, SAHA, JUHI, PALS, TIMOTHY PAUL, LAU, SOON-SENG
• Format: Patent
• Language: English
• Published: 29.05.2015
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

SYSTEM (S) AND METHOD (S) ARE PROVIDED FOR DYNAMICALLY SCALING SWITCHING FREQUENCIES AND CLOCK SOURCES OF SWITCHED MODE POWER SUPPLIES (SMPSS) IN A MOBILE STATION. SWITCHING FREQUENCY IS SCALEDTTO AN OPTIMAL VALUE IN RESPONSE TO AT LEAST ONE OF (I) A CHANGE IN MODE OF OPERATION FOR WIRELESS COMMUNICATION EMPLOYED BY THE MOBILE STATION, AN ADDITIONAL MODE OF OPERATION IS TRIGGERED, (II) A CHANGE IN OPERATION CONDITIONS OF A SET OF LOADS ASSOCIATED WITH FUNCTIONALITY OF THE MOBILE IS DETERMINED, OR (III) AN LO SPUR SET-OFF BY A SMPS IN THE PRESENCE OF AN INTERFERENCE SIGNAL WITH A FREQUENCY SPLITTING FROM AN OPERATIONAL BAND THAT MATCHES THE SMPS FREQUENCY OR AT LEAST ONE OF ITS HARMONICS.SWITCHING FREQUENCIES CAN BE SELECTED FROM A LOOKUP TABLE, OR THROUGH AN ANALYSIS OF SWITCHING FREQUENCIES AVAILABLE TO THE MOBILE AND OPERATIONAL CRITERIA.A SET OF CLOCK SOURCES CAN PROVIDE AN ENSEMBLE OF SWITCHING FREQUENCIES.