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Abstract

Data centers employ powerful application-specific integrated circuits (ASICs) that consume significant amounts of current, e.g., up to a thousand amperes, and fluctuate rapidly in their power demand. Due to various factors, e.g., large output impedance, increasing space occupied by decoupling capacitors, etc., the multi-phase voltage regulator that traditionally supplies such loads is reaching the limits of its performance. This disclosure describes a multi-phase trans-inductor voltage regulator (TLVR). The TLVR is such that each of its phases has an output inductor that is the secondary winding of a transformer whose primary windings are all connected in a series loop. The phases are driven by interleaved pulse-width modulated (PWM) waveforms. In the event of a transient in the load, the duty cycle of the PWM waveform of a phase is adjusted such that all phases respond with a changed current. The result is an extremely fast transient response that matches the demands of the load in amperage and bandwidth.

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

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