Innovative 48V Direct Conversion APEC 2016 Novel 48V Direct Conversion Innovative 48V Direct Conversion Architecture Fully Compliant to Intel VR13 Requirements Fully Isolated, Scalable, High Efficiency (ZVS, ZCS), Energy Proportional Ideal for “Any POL” Flexible Architecture Extendable to 400V Direct Conversion Bus Innovative 48V Direct Conversion VIN LRES L1 VIN COUT L2 LOAD STRG02 STRG04 CR SECONDARY VSEC1 PHX FULL BRIDGE DRIVER Cell PHY N:1 VSEC2 START CDC ISOLATION PWMY System Description PWMX Main Features STRG06 IOUT DIGITAL POWER CONTROLLER VOUT & TELEMETRY HUB RGND Experimental Intel VR13 Results Available Reference Designs System Description Innovative, Isolated 48V to 0.5V-12V Architecture • STRG02 Single wire controlled VIN LRES CR STRG02 STRG04 Driver with programmable predictive control for zero voltage operations in constant phase shift control PHX FULL BRIDGE DRIVER • STRG04 100V Full Bridge L1 VSEC1 VIN COUT L2 PHY N:1 VSEC2 START CDC • STRG06 Multiphase Resonant PWMY ISOLATION Constant On Time Digital Controller supporting up to 6 interleaved converters (automatically turned on/off by load request) with PMBUS and output voltage between 0.5V to 12V SECONDARY voltage and zero current working LOAD Synchronous Rectifier able to zero PWMX STRG06 IOUT DIGITAL POWER CONTROLLER VOUT & TELEMETRY HUB RGND • Isolated Resonant Direct Conversion • Main Features from 48V to VCORE(1.xV) / VDDR(1.2V) / VSOC(1V) / VIBC(12V, 5V, 3.3V) • Efficiency • ZVS and ZCS at any Vin [36V – 72V] and Vout [1.xV – 12V] • Energy Proportional Management Pskip and Dynamic Cell Management • No Active Clamps needed New Resonant Topology Energy Proportional • Scalable and Flexible • Converters paralleled and interleaved • Scalability according to the power demand • Variable Frequency in CCM and DCM • Instantaneous turn-on of resonant converters when load increases Scalable Digital Load and IBC • Any Digital Load • High Bandwidth • Easy to compensate as a non isolated Buck converter • Up and down reference transitions Sink mode required Power Density Telemetry, Auto-Tuning • High Power Density, Telemetry, Auto-Tuning • >160W/inch2 • Fully configurable and accessible through PMBusTM • To minimize time and effort for compensation, optimizing application design time Intel VR13 Reference Design Intel VR13 165W CPU Power Delivery Features: • Compliancy to VR13 165W CPU • Minimal PCB area with 4 cells • Efficiency peak 91%, flat until TDC (88A) • Integrated magnetics • MLCC output filter Bill of materials: • Magnetic electrical data: • Transformer turn ratio=5 • Lres=1.9uH • Lout=120nH • Cres: 2 x 100nF between phases, 33nF from each phase to GND • Cout: 120 x MLCC 47uF 4V 0805 Intel VR13 Efficiency Performances 100 1 • • • 0.95 97 4 cells voltage regulator for VR13 165W DPM enabled w/ IM rev X1 4th Cell enable in Turbo Mode (>TDC) 0.9 93 0.85 90 Efficiency Converter at Remote Sense 0.8 86 Efficiency at Remote Sense Efficiency at Bulks 0.75 82 0.7 0 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128 136 144 152 160 168 176 184 192 200 208 216 224 54V 12V, 500W Prototype spec: Vin 40V to 72V Vin nom 54V Vout nom 12V +/-1% Po 500W Output current 42A Frequency of operation 200-250KHz Power density 160W/inch2 Actual Peak Efficiency 97% Load regulation <0.1% Line regulation <0.1% Board size 1.8 x 1.8 inch2 54V 3.3V, 150W (Prototype) Prototype spec: Vin 40V to 72V Vin nom 54V Vout nom 3.3V +/-1% Po 150W Output current 44A Frequency of operation 250KHz Power density 160W/inch2 Actual Peak Efficiency 95% Load regulation <0.1% Line regulation <0.1% Board size 3.3 x 0.9 inch2 54V 1.21V, 50W (Prototype) Efficiency 54V --> 1.21V 100 98 2 Cells 1 Cell 96 • Dual Cell Design: 54V to 1.2V • 50A TDC at 1.21V Efficiency (%) 94 92 90 88 86 • 93.8% Peak Efficiency 84 82 80 0 10 20 30 Output Current (A) 40 50 60