600W Halfbridge LLC Evaluation Board. EVAL 12V 600W LLC analog EVAL 12V 600W LLC digital

Transcription

1 600W Halfbridge LLC Evaluation Board EVAL 12V 600W LLC analog EVAL 12V 600W LLC digital

2 Table of Contents General Description Efficiency Results Design Concept Page 2

3 Table of Contents General Description Efficiency Results Design Concept Page 3

4 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 V 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

5 PCB Boards Layout: Main Power Board and Control and Bias Daughter Boards Power Density>20W/inch 3 Controller Board Bias Board Page 5

6 Main Power Board Schematic Page 6

7 Bias Board Schematic Page 7

8 Analog Control Board Schematic Page 8

9 Digital Controller XMC 4200 Digital Control Daughter Board Schematic Page 9

10 PCB structure Page 10

11 Table of Contents General Description Efficiency Results Design Concept Page 11

12 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 I OUT [A] P6 190mOhm 0.1% Total Accuracy Page 12

13 10%P max V in =380V dc Page 13

14 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

15 100%P max V in =380V dc Page 15

16 Table of Contents General Description Efficiency Results Design Concept Page 16

17 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

18 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

19 gain Gain Curves dc-gain curve (600W LLC hardware revision E02) 1,2 1,1 M max n V V o _ max in _ min 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

20 Energy Related Calculations (Ref. IPP60R190P6 Device Parameters) I m 2 2 n Vo ag _ min A 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

21 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 400V V BULK V HB ecs 400V 1 tdead, min 2 Im, pk t ecs t dead,min t 2Q Page 21

22 Time Related Calculations (Ref. IPP60R190P6 Device Parameters) I I m 2 2 n V fsw _ o m ag _ max min m t t 2 2 n Vo ag _ min A 2 fsw _ max Lm dead dead 2 L tecs 400V, min 130nsec 2 Im ag, max tecs 400V, max 311n sec 2 Im ag, min A Page 22

23 Main Transformer Structure: PQ35/35 Core with TDK PC95 Ferrite Material Page 23

24 Resonant Choke: RM12 Core, Material N87 Page 24

25 Support Slides 600W LLC Evaluation Board Evaluation Board Page Technical Description Datasheets Parameters Related material Videos Product Family Pages Product Brief Application Notes Selection Guides Datasheets and Portfolio Videos Simulation Models Resonant Mode Controller Page 25

26 Support Slides Online Tools and Services 1 1 Find your Local Distributor Tools, Finders and Selectors 3 Support Page 26

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