Infineon announced at Electronica 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.
Infineon
integrated on one chip a microcontroller using the ARM Cortex-M3 processor, as
well as the nonvolatile memory, the analogue and mixed signal peripherals, the
communication interfaces along with the mosfet gate drivers.
Visit the team at Electronics Weekly’s stand in Hall A6 –
569
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 130nm Smart Power manufacturing technology with its
experience in motor control drivers to put the Embedded Power family in a
standard QFN package of only 7x7mm. Where previous multi-chip designs needed a
stand-alone microcontroller, a bridge driver and a LIN (local interconnect
network) transceiver, automotive system suppliers now benefit from motor
control designs of minimum external components count.
The Embedded Power products reduce
the component count from today’s approximately more than 150 down to less than
30, allowing integration of all functions and associated external components
for the motor control in a PCB area of merely 3cm². The Embedded Power family
thus enables the integration of electronics close to the motor for true
mechatronic designs.
“Smart motor control applications
demand a large variety of sophisticated motor control schemes that are driven
by energy efficiency, system cost reduction and comfort needs,” says Andreas
Doll, vice-president and general manager, automotive body power at Infineon
Technologies AG.
“Infineon addresses these design
challenges with its new automotive qualified Embedded Power family for
intelligent motor control using the ARM Cortex-M3 processor. Fostering the
system-on-chip approach that combines a powerful microcontroller, the mosfet
gate drivers along with all necessary sense, control and actuate functions, our
scalable Embedded Power family makes automotive system suppliers benefit from
reduced system costs, improved reliability and less system level complexity.”
Technical
features of the TLE987x and TLE986x bridge drivers
Both, the TLE987x and
the TLE986x, 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 (pulse width modulation) 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 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 optimises the system EMC behavior for a wide range of
mosfets.
The products can 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.
The TLE987x series of bridge drivers
addresses three-phase (BLDC) motor applications such as fuel pumps, HVAC
blowers, engine cooling fans, water pumps as well as other pumps and fans.
It supports sensor-less and sensor
based (including field-oriented control) BLDC motor applications addressed by
LIN or controlled via PWM. Its LIN transceiver is compatible with LIN 2.2 and
certified by IBEE-Zwickau and C&S Group.
It includes six fully
integrated NFET drivers optimised to drive a three-phase motor via six external
power Nfets.
The TLE986x series is optimised to
drive two-phase DC motors by integrating four Nfet drivers .It is suitable for
applications such as sunroofs, power window lifts and generic smart motor
control via Nfet H-bridge.
Infineon and third party vendors
support the ARM Cortex-M3 based Embedded Power family of bridge drivers by a
complete development tool chain. It includes compilers, debuggers, evaluation
board, LIN low-level driver and configuration tool as well as example software
code for motor control. Also, Infineon provides starter kits to support the
design-in.
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 (24MHz or
40MHz) and flash sizes.
Source:-http://www.electronicsweekly.com/news/design/embedded-systems/141322-2014-11/
