Anti-Lock Braking System (ABS)

Anti-Lock Braking System Solutions from Texas Instruments

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Design Considerations

An anti-lock braking system (ABS) is a safety system that allows the wheels on a motor vehicle to continue interacting with the road surface as directed by driver inputs while braking, thus preventing the wheels from locking up and avoid skidding. An ABS generally offers improved vehicle control and decreases stopping distances on dry and slippery surfaces for many drivers.

The primary input of the ABS system is the wheel speed sensor interface. Comparison of wheel speed sensor inputs can determine if individual wheels are slipping. Wheel speed sensors are typically Hall Effect, with preconditioning required to generate a readable digital PWM input to the MCU.

Microcontroller – An automotive-grade ARM based microcontroller is used to compare speed sensor data, control brake cylinder pressure and control the return pump for each wheel brake cylinder. The MCU is also responsible for diagnostics, warning notification and communication with other on board control units. Newer automotive MCUs from TI can provide evidence of their suitability for use in systems where IEC61508 and ISO26262 safety standards compliance may be required.

Anti-Lock Braking IC – The TPIC7218 is an antilock brake controller designed for use in harsh automotive environments, requiring few external components. It has eight high current low-side drivers for use with solenoid valves, four configurable wheel speed sense inputs capable of handling both Intelligent and Active sensors, and high-side gate drivers for controlling two external N-channel MOSFETs for use with a pump motor and master relay.

Power Management - The TPS65381-Q1 is a multi-rail power supply designed to supply microcontrollers in safety-critical applications, such as those found in automotive. The devices supports Texas Instruments' TMS570LS series 16/32-bit RISC flash MCU and other microcontrollers with dual-core lockstep (LS) or loosely coupled architectures (LC).

Application Notes (10)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 06 Sep 2011 1182
HTM 8 KB 06 Sep 2011 1067
HTM 8 KB 06 Sep 2011 1999
HTM 9 KB 06 Sep 2011 1156
HTM 8 KB 06 Sep 2011 965
HTM 8 KB 06 Sep 2011 1024
HTM 8 KB 23 Feb 2011 1017
HTM 8 KB 30 Aug 2010 2038
HTM 8 KB 13 Jul 2010 991
HTM 8 KB 10 Mar 2010 1205

User Guides (4)

Title Abstract Type Size (KB) Date Views
htm 8 KB 03 Apr 2013 1927
htm 8 KB 14 Sep 2012 1383
htm 8 KB 17 Nov 2011 1300
htm 8 KB 17 Apr 2011 1359

Selection and Solution Guides

Selection Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 647 KB 16 Jan 2014 4813
PDF 4.53 MB 12 Apr 2013 5258

Solution Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 2.52 MB 12 Dec 2013 8849
PDF 4.43 MB 08 Oct 2013 7845

Product Bulletin & White Papers

White Papers (2)

Title Abstract Type Size (MB) Date Views
PDF 1.62 MB 16 Sep 2011 2217
PDF 1.64 MB 02 Sep 2011 2618

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