Cree SiC Power Products Overview

© 2016 Wolfspeed, Inc. All rights reserved© 2016 Wolfspeed, Inc. All rights reservedA CREE COMPANY

Accelerating Adoption of SiC power with

Practical, Ready-to-Use SiC Devices and Circuit Solutions

that Enable Better, More Efficient Power Systems

Guy Moxey

Sr Director Power Products

© 2016 Wolfspeed, Inc. All rights reserved

2

SiC Power

6

WOLFSPEEDSIC PIONEER TO THE INDUSTRY LEADER

4+ TRILLION FIELD HOURSfor Wolfspeed SiC power products (650V –1700V)

MORE THAN 10 YEARSof commercial SiC Power products

THOUSANDS OF CUSTOMERSin all markets

MILLIONS OF FIELDED SIC MOSFETS

FIT RATE MUCH LESS THAN SI

Designs and solutions using - Fully released - Fully commercial - Industry proven SiC devices


3

• PV Inverters– Shipping in high volume

• MOSFETs, Diode, Modules

• Battery Chargers for EV– Shipping in high volume

• MOSFETs, Diodes, Modules

• Server power Supply– Shipping in high volume– Diodes in high volume, MOSFETs in evaluation

• Traction– Shipping in volumes

• SiC Modules & discrete

Motor Drives, UPS, Wind– MOSFETs, Diodes, Modules in evaluation

ADOPTION RATE OF SIC INTO VARIOUS APPLICATIONS


4SPEEDFIT DESIGN SIMULATORwww.wolfspeed.com/speedfit

A CREE COMPANY © 2017 Cree, Inc. All rights reserved

Our Goal: accelerate the adoption and deployment of SiC-based, smaller, cooler, and better power systems.

Wolfspeed’s specialized expertise and tools enable faster prototyping and implementation in Server PFC


2kW SiC based totem-pole PFC converter

Parameter Value Units

Input Voltage 180 - 264 1ph, VAC

Output Voltage 400 +/-2% VDC

Switching Frequency

80 kHz

Continuous Output Power @180/230 Vac

1.5 / 2 kW

Pk. Efficiency >98.5%

~Grid AC/DC

~-

--

IsolatedDC/DC

Size: 220 x 110 x 55 mm

Weight: 1 kg400V 12V

180-264 Vac

Server Power Supplies

PFC design becomes more challenging at Platinum level efficiency and much harder at Titanium level efficiency


Designed for efficiency, power density and costBlock diagram

Wolfspeed Devices used

P/N QTY Description

C3M0065090J 2 22A, 900V, Discrete TO-263-7L

• Simple low part count topology and control• Uses C3M discrete MOSFET in high performance SM package /w Kelvin source• Peak efficiency > 98.5% • THD < 5% at full load

C3M0065090JTO-263-7L

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwiK2uStnqzTAhXBYyYKHQtdBUYQjRwIBw&url=http://www.wolfspeed.com/power/products/sic-mosfets/7l-d2pak&psig=AFQjCNEft29QK39CUZUGEkvJxaisDlDyjA&ust=1492544140675245


8PERFORMANCE

@230V,1.94kW

Iin (5A/div)

Vin (200V/div)

MOSFET Turn-ON MOSFET Turn-OFF

Vg (5V/div)

98.1298.5 98.61 98.6 98.54

95

95.5

96

96.5

97

97.5

98

98.5

99

0 500 1000 1500 2000 2500

Effic

ienc

yOutput Power (W)

Efficiency @230V AC, 4.7Ω Gate resistance,85kHz

Easily exceeds the 98.5% at 50% load94.8% at 100% load


Summary• New C3M MOSFETs low switching losses and superior body diode

ideal for totem pole PFC designs• SiC based system achieved a peak efficiency > 98.5% and THD <

5%• Smaller in volume than existing silicon 80+ platinum solutions with

higher efficiency at equivalent EBOM cost

Customers can achieve 80+ Titanium at no additional cost.

Objective – 2kW Titanium standard PFCTo design a PFC system that when combined with DC/DC circuit can achieve system level efficiency suitable for 80+ Titanium standard with lowest BOM cost

SolutionTotem pole PFC topology Utilizing only 2 Wolfspeed SiC MOSFETs


Wolfspeed Goal : Accelerate the adoption and development of SiC based smaller, cooler and better power systems

Wolfspeed’s specialized expertise and tools enable faster prototyping and implementation in Fast DC EV Charging

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwinxJzNq9PPAhUMbz4KHf6VD78QjRwIBw&url=http://www.huffingtonpost.ca/2015/12/08/ontario-spends-20-million-to-build-electric-vehicle-charging-stations_n_8748588.html&bvm=bv.135475266,d.dmo&psig=AFQjCNF05py6yu5v4ftlkvJCqnBHHuXkyw&ust=1476295533187878


11EXAMPLE DC FAST CHARGER – LEVEL 3

Parameter L3 Typical Values

Input Voltage (Vac,rms,l-l)

380 – 480, 3-ph

Output Voltage (VDC) 220 – 550

Output Power (kW) 25 – 100

Efficiency ~ 93 %

AC/DCFilter DC/A

CAC/D

CAC

Source

Modular construction using 10 – 15 kW blocks

Challenge : Make a 20kW block smaller, cooler and more efficientWith no increase in cost

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjTmpn747vMAhXIA44KHeoFD-8QjRwIBw&url=http://traffictechnologytoday.com/news.php?NewsID=78289&psig=AFQjCNH2WB2CT-12VOfPbT7509S1kyz0sQ&ust=1462291868283982


12TWO LEVEL SiC PFC: HIGHER EFFICIENCY & POWER DENSITY

1200V, 50A Full SiC 6-pak module

1000V, 65mOTO247-4L


13EFFICIENCY COMPARISON BETWEEN 6-PACK AND 1000V 65MOHM TO-247 4-L

95,0

95,5

96,0

96,5

97,0

97,5

98,0

98,5

99,0

99,5

100,0

0 5 10 15 20 25

Effic

ienc

y (%

)

Output Power [kW]

6-pack 480V EffTO-247-4L 480V Eff

Typical silicon -based PFC= 97.0-97.8% (20kHz)


14DC/DC CONVERSION – 20KW

AC/DCFilter DC/A

CAC/D

CAC

Source

• Higher Efficiency• ZVS at full load range• Better EMI

• Wide output voltage range• Low voltage ripple / no need for e-caps

http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjTmpn747vMAhXIA44KHeoFD-8QjRwIBw&url=http://traffictechnologytoday.com/news.php?NewsID=78289&psig=AFQjCNH2WB2CT-12VOfPbT7509S1kyz0sQ&ust=1462291868283982


15SIMPLIFY WITH SiC

SiC lets you simplify !

3L LLC Topology

Interleaved 2L Si Topology

2L topology


16Si 15KW LLC (20A) VS. SiC 20KW LLC (35A)

SiC Based 20KW LLCOutput 35A

600V Si Based 15KW LLCOutput 20A Less is more !

• 4.1 Kg • Volume: 180 in^3• More components

• 3.2 Kg • Volume: 68 in^3• 20% fewer parts

Power Density (W/in3) 3.5x higher


17DOES NOT COMPROMISE ON EFFICIENCY

Note: the efficiency includes aux power losses

94,00

94,60

95,20

95,80

96,40

97,00

97,60

98,20

Effic

ienc

y (%

)

Input power (w)

Full SiC MOSFET 20kW LLC Converter Efficiency

Vin:700V, Vout:500V

Vin:750V, Vout:550V

Vin:650V, Vout:400V


1820KW LLC REFERENCE DESIGN SPECIFICATION

Parameter Value UnitsInput Voltage 650 - 750 VDCOutput Voltage 400 – 550* VDCSwitching Frequency 150 - 400 kHzMax. Output Power 20 kWMax. Output Current 35** APk. Efficiency 98.4% n/aPower Density >60 W/in3

Size*** 275 x 220 x 65 mmWeight*** 3.2 Kg

Uses the latest gen C3M0065100K1000V, 65mohm SiC MOSFET in TO-247-4 package

P/N CRD-20DD09P-2

* Vo upper limit extended to 700V when I out limited to 20A for single device config.** Io limited to 20A for single device configuration.*** PCBA only.


19SUMMARY – 20KW FAST DC CHARGER

SiC MOSFETs can simplify topology, increase power density and increase efficiency

Latest Gen SiC MOSFETs and Diodes in new packages significantly improve efficiency and power density of power converters.

Design support tools are available: SpeedFit Online Simulator Evaluation boards Online Simulators Reference designs



Wolfspeed’s specialized expertise and tools enable faster prototyping and implementation for EV drive train


21MEDIAN RANGE FOR ELECTRICAL VEHICLES 2016

Vehicle range one of the key barriers to adoption of EV. New generation of SiC MOSFETs are required to meet ambitious targets to extend vehicle range and reduce emissions CO2 emissions

Source: DOE


22DOE PROJECT WITH FORD DEMONSTRATES SIGNIFICANT DRIVE CYCLE SAVINGS USING WOLFSPEED MOSFET’S

• A 90 kW IPM traction motor model assumed

• Si IGBT and Wolfspeed SiC MOSFET compared for traction drive operation

• Synchronous rectification for SiC devices, no added parallel diodes

• Compared to Si, SiC reduces inverter losses by ~80% in electric-only drive mode for EPA metro-highway cycle.

Source: M. Su, et al., WiPDA 2016

Acknowledgment − EE0006920 “88 kWAutomotive Inverter with New 900 Volt Silicon

Carbide MOSFET Technology”

02468

10

1 202468

10

1 2

~9.1%

~ 2.12%

EPA City Cycle EPA Hwy Cycle

~2.29%~0.34%

Si IGBT SiC MOSFET

% %

Si IGBT SiC MOSFET

~ 77% inv. loss reduction

~ 85% inv. loss reduction

Inverter Loss Comparison


23DOE PROJECT WITH FORD DEMONSTRATES SIGNIFICANT DRIVE CYCLE SAVINGS USING WOLFSPEED MOSFET’S

Not 0.8 % reduction in inverter loss

Not 8.0 % reduction in inverter loss

YES 80 % reduction in inverter loss

Which directly translates into more vehicle range for same battery or same vehicle range for less batteryand no audible noise !!


24SIC MOSFETS VS. IGBT SWITCHING LOSS COMPARISON

@400V

Switching loss comparison between Si and SiC devices at 400V, 75C and multiple load current levels. SiC are tested at two switching speeds:

mJ

Comparing SiC and Si power modules:

• With same power bus stray inductance & surge voltages, SiC total switching losses are about 50% of Si’s

• Optimized stray inductance and faster switching speed: SiC switching losses can be as low as ~10% of Si.

Source: M. Su, et al., WiPDA 2016


25BENCHMARK 900V SiC & 650V Si POWER MODULES

Parameter Wolfspeed Module FF450R07ME4_B11Package HT-3000 (custom) EconoDUAL™ 3

Blocking voltage (V) 900 650TJ,MAX (°C) 175 150

RDS, ON (mΩ) (25°C/150°C) 2.5 / 3.6 N/AIDS @ 150°C (A) 405 430

QG (nC) 648 4800QR @ 150°C (µC) 2.02 35.5

• 900 V All SiC Module compared with a 650 V EconoDUAL™ 3 Si IGBT (Trench/Fieldstop IGBT4 and Emitter Controlled Diode and PressFIT / NTC)

– 250 V higher blocking voltage– 10-20x lower body diode recovery, gate charge, and

reverse transfer capacitance.– Symmetrical 3rd quadrant conduction– Lower on-state losses


Wolfspeed 200kw SiC Three-phase evaluation UNIT• Three 900 V HT-3291-VB High Performance

Half Bridge Power Modules

• Three ITGD2-3011 SiC-Optimized Companion Gate Drivers

• Ultra-Low inductive (~3.3 nH) DC Laminated Bus Bar

• DC Link Film Capacitors

• Voltage & Current Sensors


27

• New 900V SiC MOSFET technology can replace Si IGBT for better e-drive system efficiency and weight/size reduction. Using the Wolfspeed module reduces the inverter loss by 80% over entire drive profile

• Efficiency at light loads is significantly increased with new 900 V, 10 mΩ MOSFET product and prototype HT-3000 module products. SiC inverter reaches 99.5% of efficiency at high speed/low torque

• A power module was optimized around SiC devices for low inductance, fast switching, and processing power at maximum operating TJ (175°C)

• Ability to process power at 175°C allows for increasing switching frequency and/or more current conduction, extending the system capability beyond Si & associated derating at temperature

• DC system bussing optimized to achieve maximum performance – elimination of C or R-C snubber components to reduce BOM

• Efficiency map can now 100% symmetric ( drive /regen) due to MOSFET in reverse conduction

Wolfspeed SiC means more mileage range OR smaller battery

TRACTION DRIVE INVERTER SUMMARY

A CREE COMPANY © 2017 Cree, Inc. All rights reserved


Wolfspeed’s specialized expertise and tools enable faster prototyping and implementation for industrial power stacks


29POWERING STACKS WITH WOLFSPEED ALL-SIC 62MM MODULES

Air-cooled Heat sink

ProtectionGate driverPower supply

Interface to Customer Controller

AC

Φ1Φ2Φ3I

I

V

T

temperaturevoltagecurrent

DC+

DC-

DC linkcapacitor

I

Semikron SEMIKUBE Stack Size 0.5


30

3x, 2-ch. gate drivers replaced

SIMPLE MODIFICATIONS TO THE SEMIKUBEFOR HIGHER POWER AND FREQUENCY FROM WOLFSPEED 62MM ALL-SIC MODULES

Air-cooled Heat sink

ProtectionGate driverPower supply

Interface to Customer Controller

ACΦ1Φ2Φ3I

I

V

T

temperaturevoltagecurrent

DC linkcapacitor

I

3x 450A IGBT modules replaced by 3x 300A Wolfspeed All-SiC modules


31

WOLFSPEED S0.5 KUBE ENABLES HIGH FREQUENCY OPERATIONOUTPERFORMS ALL SEMIKUBE PRODUCTS AT FSW > 10 KHZ

New capability delivered byWolfspeed 62mm modules

SEMIKUBE S0.5

SEMIKUBE S1

SEMIKUBE S2

Wolfspeed KUBE S0.5


Customers achieve smaller, faster and better with Wolfspeed

Objective –Accelerating Adoption: of SiC power with Practical, Ready-to-Use SiC Devices and Circuit Solutions that Enable Better, More Efficient Power Systems

SolutionFrom Watts to Megawatts, Wolfspeed’s proven, industry leading power products are enable system level improvements TODAY.

© 2016 Wolfspeed, Inc. All rights reserved33

Thank You

Documents

Cree SiC Power Products Overview