Toshiba Launches Brushless Motor Pre-Driver IC for Automotive EPS
August 27 2015 - 10:00PM
Business Wire
Toshiba Corporation (TOKYO:6502) today announced the launch of
“TB9081FG”, a brushless motor [1] pre-driver IC enhanced to achieve
functional safety[2], for use in electric power steering systems
(EPS). Sample shipments will start on September 1st, 2015, with
mass production scheduled to start in August, 2017.
This Smart News Release features multimedia.
View the full release here:
http://www.businesswire.com/news/home/20150827005402/en/
Toshiba: a brushless motor pre-driver IC
"TB9081FG" for electric power steering systems(EPS) (Photo:
Business Wire)
More and more safety-critical automotive systems, such as EPS,
are required to meet the requirements of ASIL-D[3], the highest
automotive safety integrity level prescribed in ISO 26262, “Road
Vehicles – Functional Safety.”
The new IC integrates key main functions, including 3-phase
pre-driver circuits [4], fail-safe relay pre-driver circuits [4]
and motor current detection circuits [5], plus various failure
detection circuits. An initial diagnosis circuit to detect latent
faults in the failure detection circuits is also incorporated to
secure higher functional safety.
Toshiba has also carried out a range of functional safety
analyses to simulate various system failures and will provide
customers with documentation, such as FMEDA[6], to support safety
analysis and design.
Key Features
1. Failure detection circuits for
functional safetyBuilt-in VB over/under voltage detection
circuit, VCC over/under voltage detection circuit, over temperature
detection circuits, and short detection circuits [7].
2. Diagnosis circuit for failure detection
circuits for functional safetyA built-in diagnostic circuit
in the failure-detection circuit detects any latent faults.
3. Built-in fail-safe relay pre-driver
circuitsBuilt-in fail-safe relay pre-driver circuits drive
the semiconductor relay connected between the motor and MOSFET
(driver) and between the power-supply side and MOSFET (driver). The
fail-safe relay pre-driver circuit has a total of 5ch, three for
the motor side and two for the power-supply side. Both have
dedicated input terminals, making independent control possible.
4. Under voltage operationVoltage
drop caused by cranking after idling reduction is accommodated by
improving battery operation voltage range down to 4.5V (min.).
5. Pre-Driver operation is selectable on
failures detection.Customers can set the system to respond
to detected failures in one of two ways, using the input setting of
the SPI communication [8]. One setting uses this new IC to stop the
external MOSFET, the other switches to external control of the
MOSFET using the MCU (Micro Controller Unit). Selection can be made
according to the customer’s application or system, and for various
systems.
Main
Specifications
Part Number TB9081FG Mass Production August, 2017 Mass
Production Volume 1 million units per year Pre-driver channels
11 channels
(high side: 3 ch, low side: 3 ch,
fail-safe side: 5ch)
Operating
Voltage Range
+ 4.5 to 18V Operating Temperature Range -40 to 125°C Pre-driver
input signal Made for a direct control Detection Circuits VB
over/under voltage detection circuit, VCC over/under voltage
detection circuit, over temperature detection circuits, and short
detection circuits Motor Current Detection Circuits Converts motor
current to voltage and output to MCU Package
LQFP64-P-1010-0.50E
(12.0mm × 12.0mm × 1.6mm)
[1] A motor without a commutator (brushless)[2]
Functional-safety-based standards seek to minimize risk resulting
from system failures. ISO26262 certification recognizes that a
company's processes or products for electrical and electronic (E/E)
systems for car applications meet the stringent criteria specified
in the standard and provides third parties with an independent
means of assessing the capabilities of a potential supplier.[3]
ASIL: Automotive Safety Integrity Level[4] Pre-drivers to control
the MOSFET for driving motor[5] Converts motor current to voltage
and output to MCU (Micro Controller Unit)[6] FMEDA: Failure Modes
Effects and Diagnostics Analysis[7] Detects any short circuit
between the drain and source of a driver (MOSFET)[8] SPI: Serial
Peripheral Interface
For further information about this product, please
visit:http://toshiba.semicon-storage.com/info/lookup.jsp?pid=TB9081FG®ion=apc&lang=en
Customer Inquiries:Automotive Sales and Marketing DepartmentTel:
+81-3-3457-3428http://toshiba.semicon-storage.com/ap-en/contact.html
Information in this document, including product prices and
specifications, content of services and contact information, is
current on the date of the announcement but is subject to change
without prior notice.
About Toshiba
Toshiba Corporation, a Fortune Global 500 company, channels
world-class capabilities in advanced electronic and electrical
product and systems into five strategic business domains: Energy
& Infrastructure, Community Solutions, Healthcare Systems &
Services, Electronic Devices & Components, and Lifestyles
Products & Services. Guided by the principles of The Basic
Commitment of the Toshiba Group, “Committed to People, Committed to
the Future”, Toshiba promotes global operations towards securing
“Growth Through Creativity and Innovation”, and is contributing to
the achievement of a world in which people everywhere live in safe,
secure and comfortable society.
Founded in Tokyo in 1875, today’s Toshiba is at the heart of a
global network of over 590 consolidated companies employing over
200,000 people worldwide, with annual sales surpassing 6.5 trillion
yen (US$63 billion).To find out more about Toshiba, visit
www.toshiba.co.jp/index.htm
View source
version on businesswire.com: http://www.businesswire.com/news/home/20150827005402/en/
Media Inquiries:Toshiba CorporationSemiconductor & Storage
Products CompanyChiaki Nagasawa,
+81-3-3457-4963semicon-NR-mailbox@ml.toshiba.co.jp