850A AI ASIC 的垂直供电.pdf

1、Shenli ZouVertical Power Delivery for 850A AI ASICIt is challenging to maintain a flat high efficiency curve with ASIC power scaling up.To address this,vertical power delivery(VPD)approach is introduced to reduce PDN loss,improve power integrity,and power density,by delivering power to ASIC via vert

2、ical interconnectsWhile this approach seems appealing,there are a lot of realistic challenges during design,assembly,and system integrationIn this paper,a customized VPD module capable of delivering 850A at 0.85V for AI ASIC is designed,manufactured,and validated with carrier board.Its effectiveness

3、 is demonstrated by manufacturing design of experiments(DOE)and full engineering validation,making it ready for pre-production adoptionIntroductionPlacement and formulation8:1 UBC for the VPD module design,and 4:1 UBC to support other LPD railsVPD module placed on the bottom sideThe rough dimension

4、of VPD module is 55.5mm x 26.5mm x 6.5 mm,with very high-power-density(0.8A/mm2,1238W/inch3)5A/ns transient responseVR controller integrated into moduleVPD Module Electrical DesignThermal AnalysisAll VPD and UBC component temperatures were within the derating limits Acceptable correlation,3C error,w

5、as obtained for the component temperatures between testing and simulationsManufacturing Design of ExperimentsCross-section results of VPD moduleValidationIn this paper,a customized VPD module delivering 850A with very tight voltage regulation is presented,combining innovative design workflow,manufac

6、turing and assembly process to enable system integration.Going forward,long term reliability testing is planned,and more detailed analysis and validation around higher power VPD module will be conducted.Acknowledgement:Thanks to Mr.Chris Pe