600W Halfbridge LLC Evaluation Board EVAL 12V 600W LLC analog EVAL 12V 600W LLC digital
Table of Contents General Description Efficiency Results Design Concept Page 2
Table of Contents General Description Efficiency Results Design Concept Page 3
Example of System Understanding: Infineon Demo Solution for Titanium HV DC/DC stage Half Bridge LLC with synchronous rectification in center tap configuration V in 350-410V DC Primary HV MOSFETs CoolMOS TM IPP60R190P6 Reduced Gate Charge (Q g ) Reduced E off High body diode ruggedness SR MOSFETs OptiMOS TM BSC010N04LS New generation Best FOM R DS(on) x Q g Best FOM R DS(on) x Q oss V in_nom V out_nom I out P o 380V DC 12V DC 50A 600W LLC analog controller ICE2HS01G or digital controller XMC4200 HB Gate Drive IC 2EDL05N06PF Bias QR Flyback controller ICE2QR2280Z SR MOSFETs BSC010N04LS f res =f 0 157kHz f min 90kHz f max 210kHz Transformer turns ratio 16:1 C r 66nF L r 15.5uH L m 195uH Resonant inductor RM12 core Transformer PQ35/35 core Page 4
PCB Boards Layout: Main Power Board and Control and Bias Daughter Boards Power Density>20W/inch 3 Controller Board Bias Board Page 5
Main Power Board Schematic Page 6
Bias Board Schematic Page 7
Analog Control Board Schematic Page 8
Digital Controller XMC 4200 Digital Control Daughter Board Schematic Page 9
PCB structure Page 10
Table of Contents General Description Efficiency Results Design Concept Page 11
Efficiency Automated Efficiency Measurement Combination of converter design (resonant tank, transformer) and proper HV device selection 0,99 0,985 0,98 0,975 0,97 0,965 0,96 0,955 0,95 0,945 0,94 0,935 0,93 0,925 0,92 0,915 0,91 0,905 0,9 97.8% peak efficiency! Highest Efficiency standard in Computing applications (HV DC/DC stage) Proper selection of SR LV device and secondary side design 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 I OUT [A] P6 190mOhm 0.1% Total Accuracy Page 12
10%P max V in =380V dc Page 13
50%P max V in =380V dc 1,2 1 0,8 0,6 0,4 0,2 Turn-off losses Body diode losses Driving losses Conduction Losses 0 Losses spread on each device at 50%Pmax [W] Page 14
100%P max V in =380V dc Page 15
Table of Contents General Description Efficiency Results Design Concept Page 16
Design Procedure: Input Data n V in 2V _ nom out_ nom M min K min ( Q, m, F x ) n V V o _ min in _ max 2 M max K max ( Q, m, F x ) n V V o _ max in _ min 2 Page 17
Resonant Tank Components and Related Resonant Frequencies n=v in_nom /(2xV o )=380/(2*12) 16 L m =195µH L r =15.5µH L n =L m /L r =12.5 C r =66nF 1 fo 157kHz 2 LrCr 1 fp 42. 7kHz 2 ( Lr Lm) Cr Page 18
gain Gain Curves dc-gain curve (600W LLC hardware revision E02) 1,2 1,1 M max n V V o _ max in _ min 2 1 5 A 0,9 0,8 M min n V V o _ min in _ max 2 15 A 25 A 35 A 50 A 0,7 0,6 frequency [Hz] Page 19
Energy Related Calculations (Ref. IPP60R190P6 Device Parameters) I m 2 2 n Vo ag _ min 0. 672A 2 fsw _ max Lm En En res _ min cap _ max 1 2 ( L m Lr) I ² 1 (2Co( er)) V ² 2 mag _ min DS _ max 95.1J 9J En res _ min En cap _ max Page 20
Q oss, I mag,pk, t dead,min, t ecs Relationship I m,pk I Q2 I Q IQ 2( t) Im, ( t) 0 2 pk (1 t t ecs ) t tecs t tecs t ecs f ( Rg, tot, Vgs, th C, C ds gd ) I m,pk I CHB t dead,min 0 I ( t) dt 1 I 2 t I ( t t ) 2Qoss, CHB m, pk ecs m, pk dead, min ecs @ 400V V BULK V HB ecs oss, @ 400V 1 tdead, min 2 Im, pk t ecs t dead,min t 2Q Page 21
Time Related Calculations (Ref. IPP60R190P6 Device Parameters) I I m 2 2 n V fsw _ o m ag _ max 1. 66 min m t t 2 2 n Vo ag _ min 0. 672A 2 fsw _ max Lm dead dead 2 L tecs 2Qoss, @ 400V, min 130nsec 2 Im ag, max tecs 2Qoss, @ 400V, max 311n sec 2 Im ag, min A Page 22
Main Transformer Structure: PQ35/35 Core with TDK PC95 Ferrite Material Page 23
Resonant Choke: RM12 Core, Material N87 Page 24
Support Slides 600W LLC Evaluation Board Evaluation Board Page Technical Description Datasheets Parameters Related material Videos www.infineon.com/600w-llc-evaluationboard-a www.infineon.com/600w-llc-evaluationboard-d Product Family Pages Product Brief Application Notes Selection Guides Datasheets and Portfolio Videos Simulation Models www.infineon.com/p6 www.infineon.com/xmc Resonant Mode Controller www.infineon.com/optimos5-40v60v Page 25
Support Slides Online Tools and Services 1 1 Find your Local Distributor 2 3 2 Tools, Finders and Selectors 3 Support Page 26