Control Monitor Protect Communicatefiles.iccmedia.com/.../powercon17/munich_14_agileswitch.pdf · 2017. 12. 6. · • MTBF testing per MIL-STD-883 Method 1005.9 to achieve a 20-year

US and Int. Patents & Patents Pending CONFIDENTIAL © 2017 AgileSwitch, LLC 1

Control • Monitor • Protect • Communicate


Topics

• Overview– AgileSwitch– Products, Application Areas

• Solutions for Silicon Carbide (SiC) Modules– SiC Gate Driving Techniques– Augmented Turn-OffTM

– Harsh Environments

• Stack Electronics

US and Int. Patents & Patents Pending

AgileSwitch

• Founded January 2010 by serial entrepreneurs Albert Charpentier and Rob Weber

• Design and Manufacture of IGBT & Silicon Carbide MOSFET Gate Drivers

• Leveraging digital logic expertise, FET driver technology, advanced magnetics

• Providing optimum switching performance for IGBTs & SiC MOSFETs

• Based in Philadelphia, PA USA

3CONFIDENTIAL © 2017 AgileSwitch, LLC


Representative Customers

ICs Cores Boards Stack Electronics

Stacks/IPMs

AgileSwitch Products, Markets, Customers

4

Markets

IGBT and SiC Gate Driver Products & Systems

CONFIDENTIAL © 2017 AgileSwitch, LLC

In Development


Typical 3 Phase Inverter / Module Driver

• Dual Channel Module Driver • Optimized Turn on/ off of the IGBT

(based switching time, power module)

Built in fault detection:• Digital Desaturation (short circuit)• UVLO/OVLO (input supply voltage)• HV Overshoot (Active Clamping)• Cross Latch/ Shoot through• Up to 5 individual fault conditions

reported• Isolated Temperature monitoring • Isolated DC Link Voltage monitoring

Ensuring the IGBTs are driven correctly and protected over the lifetime of an Inverter

US and Int. Patents & Patents Pending 6CONFIDENTIAL © 2017 AgileSwitch, LLC

Silicon Carbide Modules (SiC)


Silicon Carbide MOSFETs

The technology has many benefits including:

• Extremely low Switching lossesZero reverse recovery charge improves system efficiency

• High Power DensitySmaller device footprint reduces system size and weight through higher switching frequencies

• High thermal conductivity2.5x more thermally conductive than silicon

• High Temperature OperationIncreased power density and improved reliability

CONFIDENTIAL © 2017 AgileSwitch, LLC 7


Problems associated with driving SiC MOSFETs

• SiC MOSFETs are very fast (due to their device physics)• The effect is high turn-off di/dt, which can cause:

• Vds - Voltage overshoot• Oscillation in the Vds

• SiC MOSFETs have very narrow short circuit withstand window• Drivers need to detect and respond quickly

• Susceptibility to noise (low Vth)• Temperature feedback can become critical if operation

causes die temperature to swing


Gate Driving Techniques


IGBT Gate Driver

10

di/dt control achieved by modifying the value of Rg (gate resistor)

Design Trade-Off:Larger Rg = smaller di/dt = but more losses and less efficient

IGBTs have “slow switching speeds” so larger value gate resistor can be used

IGBT Driver



SiC - Gate Driver – Solution 1


Crude control of the SiC MOSFETs using the IGBT Gate Driver by using a Large Rg(off)

However, the trade off is:1) Higher switching loss2) Slower DSAT response time

- Neither of which you needwhen using a high performanceSiC Module


Augmented Turn-OffTM


SiC - Gate Driver – Augmented Turn-OffTM

The technique provides precise switching control with:

1) Low Gate Resistor Value – Rg(on) & Rg(off) – 0.5 Ohm2) di/dt control is achieved through the use of Augmented Turn-OffTM


Augmented Turn-OffTM – Normal Operation


• High Rg• Slow gate transition• Higher Switching Losses• Need for Active Miller Clamp

• Uncontrolled di/dt

• Low Rg• Faster gate transition• Lower Switching Losses• No need for Active Miller Clamp

• Controlled di/dt• Reduced EMI

Higher Efficiency

Total Response time

Overshoot Voltage

Design Trade-Offs

Normal Operation


Resulting Efficiency - SiC MOSFET

Rg = 5.6Ω Rg = 10Ω

Conventional Gate Drive Solution

Rg = 0.5Ω

Eoff = 8.5mJ Eoff = 12.5mJ

AgileSwitch Gate Drive Solution – Augmented Turn-OffTM

Eoff = 6.4mJTurn-Off Loss Reduction: 6-50%*

*Note: Loss reduction is a function of module type & operating conditions



• High Rg• Slow gate transition• High stress in the Power

Device• Greater chance of device going to

avalanche

• Low Rg• Soft gate transition• Lower stress in the Power

Device• Reduced chance of device going to

avalanche

Augmented Turn-OffTM – Short Circuit EventShort Circuit Event


AgileSwitch Augmented Turn-OffTM

Short Circuit detected ~20% fasterVoltage overshoot reduced by ~80%

Conventional SolutionDevice Avalanched in Short

circuit conditions– too long a period before shut down

Ch2: Vds – 500V/divCh3: Vgs – 5V/divCh4: Id – 1kA/div

Test ConditionsVds = 1000VIds = 5000A

Load = Dead Short

Augmented Turn-OffTM – Short Circuit Event


Augmented Switching Customer Test Results


Conventional Driver AgileSwitch Driver – Augmented Turn-Off

Source: Wolfspeed

Overshoot = 500V

Overshoot = 100V

Current@ SC detection = 5000A

Current@ SC detection = 4200A

Overshoot 100V vs 500V


AgileSwitch SiC Drivers help Designers

Reduce Turn-Off Loss –up to 50%

Reduce Turn-Off Overshoot –up to 80%

Detect Short Circuit – Up to 20% faster



AgileSwitch SiC Drivers Also Feature

7 Fault Codes vs. 1 from other Manuf’sHigher Ambient Operating Temp (105°C vs. 85°C)

Temperature and DC Link Voltage MonitoringSoftware Configurability


Software Configurable Features• Augmented Turn-OffTM (ATOff)• Power supply under-voltage lockout (UVLO)• Power supply over-voltage lockout (OVLO)• Desaturation detection settings• Dead time• Fault lockout settings• Automatic Reset settings


Key SiC Driver Technologies Summary


Augmented SwitchingTM

Reduced Ringing , Voltage

overshoot

Lower Switching

Losses

Precise DSAT

Control

Advanced Fault Monitoring

Enhanced Reliability

Better Diagnostics

Software ConfigurableShortened Design

CycleDesign Flexibility


EDEM3-Programmable EconoDualTM Electrical Series

22

Software Programmable Features (8):• Augmented Turn-OffTM (ATOff)• Power supply under-voltage lockout (UVLO)• Power supply over-voltage lockout (OVLO)• Desaturation detection settings• Dead time• Fault lockout settings• Automatic Reset settings

Key Switch Driver Features:• 7 Unique Fault conditions• Isolated Temperature Monitoring, PWM• Isolated High Voltage Monitoring, PWM• 2 X 3W output power• RoHS and UL compliant design• Interface for 5V or 15V logic levels• Gate drive voltage +18V/-4V• Peak gate current +/-15A


SiC Applications


62EM1-Programmable 62mm Electrical Series

23

Software Programmable Features (8):• Augmented Turn-OffTM (ATOff)• Power supply under-voltage lockout (UVLO)• Power supply over-voltage lockout (OVLO)• Desaturation detection settings• Dead time• Fault lockout settings• Automatic Reset settings

Key Switch Driver Features:• 7 Unique Fault conditions• Temperature Monitoring, PWM• Isolated High Voltage Monitoring, PWM• 2 X 10W output power• RoHS and UL compliant design• Interface for 5V or 15V logic levels• Gate drive voltage +20V/-5V• Peak gate current +/-20A


SiC Applications


Reliability in Harsh Environments


Optional Conformal Coating

Environmental Testing

Shock and vibration

• HumiSeal UV40 UV Conformal coating is dispensed to precise specifications including coating thickness and keep-out areas such as connector pins

• Each board is digitally inspected under UV light

• Storage, Transportation, and Operational testing in accordance with IEC 607212-9:2014 to be performed

• MTBF testing per MIL-STD-883 Method 1005.9 to achieve a 20-year product lifetime at an ambient of 85 °C

• HAST testing to be performed, per JESD22A118B, with conformal coated boards at the following conditions: 105 °C, 85% RH, 96 hours, +15V supply


Interface And Mounting Options for 62EM1

Side Mount

Top Mount

Industry Standard – 28 pin

D-SUB TractionTE 1734350-1

Board to BoardFCI 87606-310LF

Interface board



Driver IC Series• Non-Isolated

Gate Driver Core• High Power, High

Voltage

Driver IC Series• Isolated

(Automotive Focus)

AgileSwitch Product Roadmap


Q2 2018

Q3 2018 Q2 2019


Stack Electronics


Analog Stack Electronics


Key Features• SiC & IGBT Compatible• 50kVA to 750kVA power range• DC-AC, DC-DC, AC-AC, or AC-DC• Current Sensing• Temperature and DC Link Monitoring

(PWM)• Software Configurable• Fault LEDs

Applications


IPM Reference Designs

29

AgileSwitch Stack Electronics

• Module Driver board• Interface board

to controller

150kVA 3-phase SiC Power Stack 750kVA 3-phase IGBT Power Stack

100kVA at 50kHz switching frequency



National Labs Relationships

• AgileSwitch actively engages with DOE funded organizations– PowerAmerica Institute– Oak Ridge National Labs– Jefferson National Labs– Sandia National Labs

• AgileSwitch is also a member of working groups and road mapping committees



Solutions for Silicon IGBTs



IGBT Gate Driver Product Line

32

Series EconoDualTM PrimePACKTM HPM/IHM/HiPack

Voltage 600V – 1.7kV 1.2kV & 1.7kV 1.2kV – 3.3kV

Configurable Software Software Yes

Channels 2 2 1

Power/ Channel 2W 5W 7W

Peak Gate Current +/- 15A +/- 20A +/- 30A

Interface Electrical Electrical/ Fiber Fiber

Isolated Temperature Monitoring

Yes Yes No

Isolated DC Link Voltage Monitoring

Yes Yes No


IGBT Applications


How to Reach Us

• Website: www.AgileSwitch.com• Email: [email protected]• Phone: +1 484-483-3256 (US)

+44 (0)7882 758982 (Europe)

Cliff Robins: [email protected] Satheesh: [email protected] Weber: [email protected]


http://www.agileswitch.com/

mailto:[email protected]





Thank you


Documents

Control Monitor Protect Communicatefiles.iccmedia.com/.../powercon17/munich_14_agileswitch.pdf · 2017. 12. 6. · • MTBF testing per MIL-STD-883 Method 1005.9 to achieve a 20-year