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Embedded power platform addresses mechatronic designs Addressing car manufacturers’ and tier one’s strategy towards electrification of auxiliary components in vehicles, Infineon has launched an intelligent motor driver chip platform with embedded 32-bit ARM Cortex M3 processors inside. The first two family members are the TLE987x series for 3-phase (brushless DC) motors and the TLE986x series for 2phase (DC) motors. In this product family, Infineon combined its proprietary automotive qualified 130nm Smart Power manufacturing technology with its experience in motor control drivers. “Our strategy is bringing the intelligence next to the motors in mechatronic designs”, said Theodore Varelas, Marketing Manager, Automotive Body Power Applications at Infineon. Where previous multi-chip designs needed a standalone microcontroller, a bridge driver and a LIN bus transceiver, users of the new chip family benefit from motor control designs with minimum external components count. The products reduce the component count from today’s approximately more than 150 down to less than 30, thus allowing integration of all functions and associated external components for the motor control in a PCB area of merely 3cm. The peripheral set of both the the TLE987x and the TLE986x includes a current sensor, a successive approximation 10-bit ADC synchronized with the capture and compare unit for PWM control and 16-bit timers. Both series include an on-chip linear voltage regulator to supply external loads. Their flash memory is scalable from 36kB to 128kB. They operate from 5.4V up to 28V. An integrated charge pump enables low voltage operation using only two external capacitors, resulting in a significant BoM reduction when compared with the commonly used voltage bootstrap techniques. The bridge drivers feature programmable charging and discharging current. The patented current slope control technique optimizes the system EMC behaviour for a wide range of MOSFETs. The products withstand load dump conditions up to 40V while maintaining an extended supply voltage operating down to 3.0V where the microcontroller and the flash memory are fully functional. Infineon www.infineon.com Synchronous buck-boost controller regulates up to 250W LT3790 is a synchronous buck-boost DC/DC controller that delivers up to 250W of power with a single IC. Its 4.7V to 60V input voltage range suits it for automotive and industrial applications. Its output voltage can be set from 0V to 60V, for use as a voltage regulator or battery/supercapacitor charger. The LT3790’s internal 4-switch buck-boost controller operates from input voltages above, below or equal to the output voltage, for applications such as automotive, where the input voltage can vary dramatically during stop/start, cold crank and load dump scenarios. Transitions between buck, pass-through and boost operating modes are seamless, offering a well regulated output in spite of wide variations of supply voltage. The LT3790’s design has three control loops to monitor input current, output current and output voltage. The LT3790 uses four external switching MOSFETs and can deliver up to 250W of continuous output power with efficiencies up to 98.5%. Output current accuracy of ±6% ensures precise current regulation while ±2% output voltage accuracy offers a precise output voltage, making it suitable for charging applications. Multiple LT3790s can be paralleled for higher power requirements. Its switching frequency can be programmed between 200 kHz and 700 kHz or synchronised to an external clock. Additional features include output disconnect, input and output current monitors, a C/10 charge termination and integrated fault protection. The LT3790EFE is available in a 38-lead thermally enhanced TSSOP package. Linear Technology www.linear.com A8E_EE-Times-Eur_2-375x10-875_A8.qxd 10/17/14 4 Surface Mount (and Plug In) Transformers and Inductors See Pico’s full Catalog immediately ww w.picoel ec t r onic s . com Low Profile from .18"ht. Audio Transformers Impedance Levels 10 ohms to 250k ohms, Power Levels to 3 Watts, Frequency Response ±3db 20Hz to 250Hz. All units manufactured and tested to MIL-PRF-27. QPL Units available. Power & EMI Inductors Ideal for Noise, Spike and Power Filtering Applications in Power Supplies, DC-DC Converters and Switching Regulators Pulse Transformers 10 Nanoseconds to 100 Microseconds. ET Rating to 150 Volt Microsecond, Manufactured and tested to MIL-PRF-21038. Multiplex Data Bus Pulse Transformers Plug-In units meet the requirements of QPL-MIL-PRF 21038/27. Surface units are electrical equivalents of QPL-MIL-PRF 21038/27. DC-DC Converter Transformers Input voltages of 5V, 12V, 24V And 48V. Standard Output Voltages to 300V (Special voltages can be supplied). Can be used as self saturating or linear switching applications. All units manufactured and tested to MIL-PRF-27. 400Hz/800Hz Power Transformers 0.4 Watts to 150 Watts. Secondary Voltages 5V to 300V. Units manufactured to MIL-PRF-27 Grade 5, Class S (Class V, 1550C available). Delivery-Stock to one week for sample quantities PICO Electronics, Inc. 143 Sparks Ave. Pelham, N.Y. 10803 E Mail: info@picoelectronics.com www.picoelectronics.com Pico Representatives Germany ELBV/Electronische Bauelemente Vertrieb E mail: info@elbv.de Phone: 0049 (0)89 4602852 Fax: 0049 (0)89 46205442 England Ginsbury Electronics Ltd. E-mail: rbennett@ginsbury.co.uk Phone: 0044 1634 298900 Fax: 0044 1634 290904 www.electronics-eetimes.com Electronic Engineering Times Europe December 2014 43


EETE DEC 2014
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