EVAL_2500W_PFC_GAN_A Infineon

AN 201702 PL52 011 2500 W full-bridge totem-pole power factor correction using CoolGaN Order code: EVAL 2500W PFC GAN A Author: Severin Kampl and Rafael Garcia About this document Scope and purpose This is an application note dedicated to Infineons 2500 W totem-pole full-bridge Power Factor Correction (PFC) TM TM demo board comprising CoolGaN e-mode HEMTs, CoolMOS SJ MOSFETs and an ICE3 PFC controller in combination with 1EDi HV MOSFET drivers. Intended audience This application note is intended for Infineon customers and partners using Infineons CoolGaN technology. Application Note Please read the Important Notice and Warnings at the end of this document Revision 1.1 www.infineon.com/GaN 05-11-2018 2500 W full-bridge totem-pole power factor correction using CoolGaN Table of contents Table of contents About this document ....................................................................................................................... 1 1 PFC demonstration platform ........................................................................................... 3 1.1 Totem-pole full-bridge PFC ..................................................................................................................... 3 1.2 Schematic and implementation details ................................................................................................. 4 1.2.1 PWM switching frequency .................................................................................................................. 4 1.2.2 PFC inductor design ........................................................................................................................... 4 1.3 Gate driving ............................................................................................................................................. 5 1.4 Layout considerations ............................................................................................................................. 8 1.5 Thermal concept ..................................................................................................................................... 9 1.6 EMI filters ............................................................................................................................................... 10 1.7 Auxiliary power supply .......................................................................................................................... 10 1.8 Control daughter boards....................................................................................................................... 12 1.8.1 Zero crossing detection ................................................................................................................... 13 1.8.2 V sensing ..................................................................................................................................... 13 BULK 1.8.3 Switch, diode and synchronous sectification signal generation ................................................... 13 1.8.4 Level shifter ...................................................................................................................................... 13 1.8.5 Zero current turn off and zero window comparator ....................................................................... 14 1.8.6 True DCM monitor / enabler ............................................................................................................ 14 1.8.7 Current sensing approach ............................................................................................................... 14 2 Getting started with the hardware .................................................................................. 15 2.1 Basic wiring and connections ............................................................................................................... 15 2.2 Start-up procedure ................................................................................................................................ 18 2.2.1 AC input voltage requirements ........................................................................................................ 19 2.2.2 DC output voltage ............................................................................................................................ 19 3 Measurement results..................................................................................................... 20 3.1 Efficiency measurement ....................................................................................................................... 20 3.2 Gate signal measurements ................................................................................................................... 20 3.3 Start-up .................................................................................................................................................. 24 3.4 AC-line cycle drop-out test .................................................................................................................... 29 3.5 Load steps .............................................................................................................................................. 30 3.6 EMI measurement result ....................................................................................................................... 30 4 Specifications ............................................................................................................... 32 5 Addendum ................................................................................................................... 33 5.1 Schematics of the main board .............................................................................................................. 33 5.1 Schematics of the auxiliary supply daughter board ............................................................................ 35 5.2 Schematics of the control board .......................................................................................................... 36 5.3 Bill of Materials (BOM) ........................................................................................................................... 37 5.3.1 Main board ........................................................................................................................................ 37 5.3.1 Auxillary supply daughter board ..................................................................................................... 39 5.3.2 Controller daughter board ............................................................................................................... 40 5.4 Abbreviations ........................................................................................................................................ 42 6 References ................................................................................................................... 44 7 Revision history ............................................................................................................ 45 Application Note 2 Revision 1.1 05-11-2018