New Generation of Magnetic Position Sensors from Infineon Improves Energy Efficiency and Reduces Operating Noise in BLDC Motor Control Applications

Nov 13, 2012 | Technology Media

Neubiberg, Germany – November 13, 2012 – Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) today introduced a new generation of Hall switches (TLE496x) and angle sensors (TLE5009 and TLE5012B) that enable more energy-efficient and compact design of brushless DC (BLDC) motor drives. BLDC motors, in comparison to conventional motors with brushes, provide greater efficiency, longer life cycles, more compact design, less noise and improved reliability. The new Infineon devices are precise and fast magnetic position sensors with high resolution. They accurately sense the rotor position thus providing ideal solutions for current commutation in BLDC drives in a broad range of industrial and automotive applications; for example in clutch actuators, window lifters, e-bikes, washing machines, industrial fans, pumps or automatic positioning systems.

Many drives require conventional block commutation. These benefit from the TLE496x family of Hall switches on energy savings and precise, compact system designs. With current consumption of just 1.6mA, TLE496x devices can cut energy needs by up to 50 percent compared to similar products on the market. In the space saving SOT (Small Outline Transistor)-23 package they require less than 22 percent of the PCB area compared to the usual SC (SemiConductor)-59 package. The TLE496x family’s small magnetic hysteresis enables precise switching points in systems. Integrated circuits compensate magnetic drifts and enable stable performance over temperature and lifetime. Active chopping techniques compensate offsets in the signal path and the influence of mechanical stress on the Hall element.

Directly measuring the rotor angle can raise efficiency levels even further and eliminates vibrations, which in turn cuts noise levels and ensures smoother integration. Based on innovative iGMR (integrated Giant Magnetic Resistive) technology, the new TLE5009 and TLE5012B angle sensor products pave the way for more comfortable and energy-saving motor control concepts. The angle sensors in the TLE5009 and TLE5012B series are characterized by extremely rapid updating in combination with extremely short delay times of 9 µs for the TLE5009 and 42 µs for theTLE5012B. Thus, high efficiency is achieved, even with fast rotating speeds and load changes. In addition, integrated signal processing in the TLE5012B reduces the load of the microcontroller by carrying out precise angle calculations and calibration algorithms: The angle value provided from TLE5012B can be directly used in the motor control loop.

Key features of the Hall switches TLE4961 and TLE4968

The Hall switches TLE4961 (latch) and TLE 4968 (bipolar switch) can be operated in the range of 3V to 32V with an uncontrolled power supply. They withstand voltages of up to 42V without the need for an additional external resistor. They provide a high degree of sensitivity and stability with regard to the magnetic switching points (Bop = +/- 1mT and +/- 2mT) and are extremely resistant to mechanical stress thanks to integrated error compensation. Outputs are protected against over currents and over temperature and are extremely resistant to electrostatic discharges (+/- 7kV HBM). Jitter at typical speeds is about 0.35µs. In addition to the small leadless SOT-23 they are also available in a leaded SSO (Single Small Outline)-3 package.

Key features of the angle sensors TLE5009 and TLE5012B

The TLE5009 and TLE5012B angle sensors measure the orientation of a magnetic field in parallel to their package surface within a range of 0° to 360°. The TLE5009 is a cost-effective solution with an analog interface and easy implementation, whereas the versatile, highly-integrated TLE5012B has extended data processing functions and several user-selectable interfaces. With 42μs update rate, the TLE5012B sets new standards with regard to the combination of a short delay time and a high signal resolution. It provides angle accuracy of 1° with 15-bit resolution over the entire functionality range. This makes the TLE5012B ideal for precise recording of rotor positions in highly dynamic applications like robotics or electric power steering. For a high degree of functional reliability the TLE5012B sensor has advanced self-testing functions and status monitoring, and special architectural features such as separate data paths for each of the two integrated Wheatstone sensor bridges. Both, the TLE5009 and TLE5012B, operate at a supply voltage of 3.3V or 5V and are available in a DSO (Dual Small Outline)-8 package.

Further information

Further information on the sensor products of Infineon is available at www.infineon.com/sensors

About Infineon

Infineon Technologies AG, Neubiberg, Germany, offers semiconductor and system solutions addressing three central challenges to modern society: energy efficiency, mobility, and security. In the 2011 fiscal year (ending September 30), the company reported sales of Euro 4.0 billion with close to 26,000 employees worldwide. Infineon is listed on the Frankfurt Stock Exchange (ticker symbol: IFX) and in the USA on the over-the-counter market OTCQX International Premier (ticker symbol: IFNNY). Further information is available at www.infineon.com.

Information Number

INFATV201211.015

Press Photos

  • The Hall switches of the TLE496x family and angle sensors TLE5009 and TLE5012B improve energy efficiency and reduce operating noise in BLDC motor control applications.
    The Hall switches of the TLE496x family and angle sensors TLE5009 and TLE5012B improve energy efficiency and reduce operating noise in BLDC motor control applications.
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