In mid-November 2014, Infineon announced an ARM-based Embedded Power family of bridge drivers offering an unmatched level of integration to address the growing trend towards intelligent motor control for a wide range of automotive applications. The Embedded Power family offers 32-bit performance in an application space that it is typically associated with 16-bit. Sample quantities of the first members of the Embedded Power family are available for the TLE987x series for three-phase (brushless DC) motors and the TLE986x series for two-phase (DC) motors.
Infineon combined its proprietary automotive qualified 130-nm Smart Power manufacturing technology with its vast experience in motor control drivers into the new, highly integrated Embedded Power family, available in a standard QFN package of only 7 mm × 7 mm in dimension. Where previous multi-chip designs needed a standalone microcontroller, a bridge driver, and a LIN transceiver, automotive system suppliers now benefit from motor control designs of minimum external components count. The newly released Embedded Power products reduce the component count 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 3 cm². As a result, the Embedded Power family enables the integration of electronics close to the motor for true mechatronic designs.
Both the TLE987x and TLE986x bridge drivers use the ARM Cortex TM-M3 processor. Their peripheral set includes a current sensor, a successive approximation 10-bit ADC synchronized with the capture and compare unit (CAPCOM6) for PWM control and 16-bit timers. A LIN transceiver is integrated to enable communication to the devices along with a number of general-purpose I/Os. Both series include an on-chip linear voltage regulator to supply external loads. Their flash memory is scalable from 36 to 128 KB. They operate from 5.4 V up to 28 V. An integrated charge pump enables low-voltage operation using only two external capacitors. The bridge drivers feature programmable charging and discharging current. The patented current slope control technique optimizes the system EMC behavior for a wide range of MOSFETs. The products can withstand load dump conditions up to 40 V while maintaining an extended supply voltage operating down to 3.0V where the microcontroller and the flash memory are fully functional.
The TLE987x series of bridge drivers addresses three-phase (BLDC) motor applications such as fuel pumps, HVAC blowers, engine cooling fans, and water pumps. It supports sensor-less and sensor-based (including field-oriented control) BLDC motor applications addressed by LIN or controlled via PWM.
The TLE986x series is optimized to drive two-phase DC motors by integrating four NFET drivers. The TLE986x series is suitable for applications such as sunroofs, power window lifts and generic smart motor control via NFET H-Bridge.
Engineering samples of the TLE987x and TLE986x bridge drivers in a space-saving VQFN-48 package are available with volume production planned to start in Q1 2015. For both series, there are several derivatives available, differing for example in system clock (24 MHz or 40 MHz) and flash sizes.
Sponsor this Article
Circuit Cellar's editorial team comprises professional engineers, technical editors, and digital media specialists. You can reach the Editorial Department at firstname.lastname@example.org, @circuitcellar, and facebook.com/circuitcellar