Trinamic TMC603-EVAL evaluation Board TMC603-EVAL 데이터 시트

제품 코드

TMC603-EVAL

TMC603 DATA SHEET (V. 1.05 / 11. Mar. 2009)

3 System architecture using the TMC603

HS-drive

LS-drive

1 of 3 shown

linear

regulator

12V step

down

regulator

break

before

make

logic

slope

control

slope HS

slope LS

gate off detection

error logic

short to GND 1,2,3

bridge current
measurement

short to

GND

detection

HallFX

for

sensorless

commutation

DRIVER

SECTION

NFET power MOS half bridges

BLDC motor

TMC603

micro

controller

POWER

BUS / IO

position sensor

figure 1: application block diagram

The TMC603 is a BLDC driver IC using external power MOS transistors. Its unique feature set allows
equipping  inexpensive  and  small  drive  systems  with  a  maximum  of  intelligence,  protection  and
diagnostic features. Control algorithms previously only found in much more complex servo drives can
now  be  realized  with  a  minimum  of  external  components.  Depending  on  the  desired  commutation
scheme  and  the  bus  interface  requirements,  the  TMC603  forms  a  complete  motor  driver  system  in
combination  with  an  external  8  bit  processor  or  with  a  more  powerful  32  bit  processor.  A  simple
system can work with three standard PWM outputs even for sine commutation!  The complete analog
amplification  and filtering frontend  as  well  as the power driver controller are realized  in the  TMC603.
Its integrated support for sine commutation as well as for back EMF sensing saves cost and allows for
maximum drive efficiency.

The  external  microcontroller  realizes  commutation  and  control  algorithms.  Based  on  the  position
information  from  an  encoder  or  hall  sensors,  the  microcontroller  can do  block  commutation  or  sine
commutation  with  or  without  space  vector  modulation  and  realizes  control  algorithms  like  a  PID
regulator  for  velocity  or  position  or  field  oriented  control  based  on  the  current  signals  from  the
TMC603. For sensorless commutation, the microcontroller needs to do a forward controlled motor start
without  feedback.  This  can  be  realized  either  using  block  commutation  or  sine  commutation.  A  sine
commutated start-up minimizes motor vibrations during start up. As soon as the minimum velocity for
hallFX is reached, it can switch to block commutation and drive the motor based on the hallFX signals.

The  TMC603  also  supports  control  of  three  phase  stepper  motors  as  well  as  two  phase  stepper
motors using two devices.