Safety-critical automotive systems, such as electric power steering (EPS), must meet the requirements of ASIL-D [2], the highest automotive safety integrity level prescribed in ISO 26262, “Road Vehicles – Functional Safety.” Toshiba’s new brushed motor pre-driver IC integrates essential functions, including a pre-driver circuit[3] and motor current detection circuit[4], plus various failure detection circuits for 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 to support safety analysis and design.
Key Features of the New Product
1. Built-in motor current detection circuit
Can simplify the system and reduce PCB size.
2. Redundant function for functional safety
Motor current detection circuit with redundant configuration for functional safety.
3. Motor control is selectable
Depending on the system, sequence control or direct control is selectable.
4. Pre-Driver operation is selectable when failure is detected
Control by pre-driver or MCU is selectable, when failure is detected.
Main Specifications
Part NumberTB9052FNG
Mass ProductionMarch, 2015
Mass Production Volume1 million per year
Channels4 channels (high side: 2 channels; low side: 2 channels)
Operating
Voltage Range
+6 to 18V
Operating Temperature Range-40 to 125°C
Input signalSequence control and direct control
Detection CircuitsBattery under voltage detection circuit, 5V under voltage detection circuit, over temperature detection, short detection circuit[5]
Motor Current Detection CircuitsConvert motor current to voltage and output to MCU
PackageHTSSOP48-P-300-0.50（12.5mm × 6.1mm × 1.2mm）
[1]: A motor with commutator (brush)
[2]: ASIL: Automotive Safety Integrity Level
[3]: Pre-driver controls the MOSFET for driving motor
[4]: Convert from motor current to voltage and output to MCU
[5]: Detect the short circuit failure between drain and source of a driver (MOSFET)
Customer Inquiries:
Automotive Sales and Marketing Department
Tel: +81-3-3457-3428
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
Contacts
Media Inquiries:
Toshiba Corporation
Semiconductor & Storage Products Company
Chiaki Nagasawa, +81-3-3457-4963
