Method and apparatus for phase current balancing in multi-phase DC-DC converter

• Main Authors: STOICHITA IOAN, TALARI SUNIL PRABHAKAR R, MEDNIK ALEXANDER
• Format: Patent
• Language: Chinese; English
• Published: 31.01.2023
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

A multi-phase DC-DC controller is provided. The controller includes: a plurality of current sense circuits that sense currents in respective converter cells of the converter and generate respective current sense signals; an averaging circuit that receives the respective current sense signal and generates an averaging signal; a plurality of error detector circuits that compare the respective current sense signals to the average signal and generate respective voltage imbalance signals; a plurality of transconductance circuits that convert the respective voltage imbalance signals to respective current imbalance signals; and a plurality of pulse width modulation (PWM) generators that output PWM signals to control the respective converter units based on a comparison between a ramp threshold voltage of the PWM generators and a PWM ramp voltage, the comparison is based on a sum of one of the respective current imbalance signals and a first current proportional to the input voltage. 提供了一种多相DC-DC控制器。该控制器包括：多个电流感测电路，该多