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The ST7MC family
and its enhanced motor control cell offers significant advantages compared to
other microprocessor-based approaches such as DSPs.
 Designed
specifically to control three-phase brushless motors and compressors, the ST7MC
family of 8-bit microcontrollers includes a dedicated motor control macrocell
that ensures optimum control of brushless DC and induction motors, as well as
other motor and compressor types. The ST7MC family also maintains full motor performance
and system efficiency over the widest range of available motor/compressor and
control topologies.
The
ST7MC's key benefits have been achieved through a macrocell hardware approach,
coupled with very substantial component
integration, plus a complete family
of Flash/ROM packages and high quality, application-oriented development tools.
Designed in close cooperation with appliance, automotive, HVAC and industrial
partners the ST7MC has allowed them to meet cost and performance needs while ensuring
maximum flexibility in implementing their control strategy.
| Features: |
| • | High
on-chip integration of motor control related analog/digital functions |
| • | Sensorless
or sensor operation | | • | Single-chip
solution for both induction and permanent magnet (AC or DC) three-phase motors |
| • | Complete
range of packages and memory size from 32 to 80 pins and 8K to 60K Flash or Mask
ROM | | • | Multiple
programmable filters and blanking windows on events such as back- emf sensing,
demagnetization and current sensing | | • | Low
EMI and 8MHz recommended external frequency |
| • | Low
run mode power consumption | | • | High-current
PWM outputs with up to 2MHz carrier modulation capability |
| • | Hardware
computed, programmable commutation delay (256 steps) |
| • | A
complete set of standard MCU peripherals (timers, A/D converters, I/Os) and communication
interfaces including dedicated LINSCI for LIN bus |
| • | Advanced
motor safety features | | • | -40
to 125ºC available on several packages |
| • | Available
optimized C software libraries for various motors |
| • | On-chip
debug module | |
| Benefits: |
| • | Reduced
processor cost, component count and system cost |
| • |
Reduced PCB space with small footprint and few components |
| • | Optimum
system scalability | | • | Significantly
reduced time to market with easy-to-use tools |
| • | 70%
of CPU available for non-motor control related tasks
o Ideal for automotive
low-side PWM switching | | • | Compatible
with the widest range of motors and compressors, from 12V DC to 240V AC |
| • | Hardware
protection of power stage whatever the status of the MCU |
| • | Optimum
efficiency using dynamic voltage adjustment |
| • | Highly
flexible sensorless solutions to reduce system costs |
| | | Applications |
| • |
Air conditioners, washing machines, dishwasher pumps, and food processors |
| • |
Refrigerators, vacuum cleaners,
and cooking hoods | | • | Automotive
fuel pumps, water pumps, cooling fans, and interior blowers |
| • |
Industrial Electric vehicles, HVAC actuators and fans, pumps and blowers |
| • |
Office automation, vending and cash machines, paramedical equipment |
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