1. Devices and technology unique to electric drive vehicles
Logan J Lauder

2. Background 6.5 million E.Vs on the road today
Typically operating between 12V – 400V
DC or AC current

3. Overview IGBTs for inverters and motor controllers
Fast switching power MOSFETS
Ultrafast diodes for charging and surge protection
Battery monitoring systems
Gate driver/ FET controller

4. POWER Transistor (IGBTS & FETS)
H Bridge motor driver
Found in charging system and drive train
High current (hundred of amps)
Require larger profile to dissipate heat
Diagram on right is overly simplified for E.Vs!

5. POWER Transistor (IGBTS & FETS) cont…
Minimize I^2R losses by turning on and off quickly
Minimal heat dissipation in the linear region (Vgs >= Vdd)
This is achieved using special gate driver circuitry

6. Inverters AC motor controllers Make use of IGBTs and power MOSFETS
Many E.Vs contain AC drive motors
Must handle large steady state currents and even larger transient currents
Picture is a 3kw AC induction motor

7. Diodes Many applications for diodes in Ev’s Rectification
Circuit protection from inductive back EMF
Prevents current backflow

8. Diodes cont…
High speed diodes are ideal for DC-DC applications in switch mode circuits, where high frequencies are often desirable
STM’s STTH4R02-Y has a recovery time of 16ns

9. Lithium ion battery monitoring
TI’s bq76PL536A-Q1
Stackable
Monitors battery voltage and temperature
Triggers when under-voltage or over-voltage is detected.

10. Conclusion
Electric vehicle market is having drastic effects on semiconductor development
As new EV technology emerges, so will new Semiconductor technology to match it
Plenty of R&D yet to be done

11. 5 key points
Unique solutions are required to accommodate large amount of current at low voltages
High speed and current diodes and transistors are designed specifically for Evs
Ev’s take many shapes and forms, therefore there is a diverse array of semiconductor products being made to suite their individual needs
Semiconductor field is changing to accommodate the recent explosion in the production of Evs
Both fields are going to continue to grow as Evs become more prominent

12. Questions?

13. References