TMC603A Datasheet, PDF (12/44 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Three phase motor driver with BLDC back EMF commutation hallFX™ and current sensing

TMC603A DATA SHEET (V. 1.15 / 2009-Nov-19)
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Alternatively, the required time can be calculated and pre-compensated in the PWM block of the
microcontroller driving the TMC603 (external BBM control).
Internal BBM control
External BBM control
BLx 0V
BHx 0V
VVLS
LSx
0V
VVM
BMx
0V
HSx
VVCP
VVM
0V
HSx-
BMx
VVCP -
VVM
0V
Miller plateau
tLSON
tLSOFF
tBBMLH
Load pulling BMx down
figure 6: bridge driver timing
tBBMHL
Miller plateau
tHSON
Load pulling BMx up to +VM
Pin
BBM_EN
Comments
Enables internal break-before-make circuitry (high = enable)
5.2.3 PWM control via microcontroller
There is a number of different microcontrollers available, which provide specific BLDC commutation
units. However, the TMC603 is designed in a way in order to allow BLDC control via standard
microcontrollers, which have only a limited number of (free) PWM units. The following figure shows
several possibilities to control the BLDC motor with different types of microcontrollers, and shall help to
optimally adapt the TMC603 control interface to the features of your microcontroller. The hall signals
and further signals, like CURx interconnection to an ADC input, are not shown.
Copyright © 2009 TRINAMIC Motion Control GmbH & Co. KG