TMC5031 DATASHEET (Rev. 1.11 / 2016-APR-28)
73
22 Table of Figures
Figure 1.1 Basic application and block diagram..........................................................................................................4
Figure 1.2 Energy efficiency with coolStep (example)...............................................................................................6
Figure 2.1 TMC5031 pin assignments..............................................................................................................................7
Figure 3.1 Standard application circuit.........................................................................................................................10
Figure 3.2 External supply of VCC_IO (showing optional filtering for VCC)......................................................11
Figure 3.3 5V only operation...........................................................................................................................................12
Figure 3.4 Using an external 5V supply to reduce linear regulator power dissipation.................................13
Figure 3.5 Using an external 5V supply to bypass internal regulator ................................................................13
Figure 3.6 Adding an RC-Filter on VCC for reduced ripple.....................................................................................14
Figure 3.7 Simple ESD enhancement and more elaborate motor output protection ....................................15
Figure 4.1 SPI timing.........................................................................................................................................................18
Figure 7.1 Chopper phases ..............................................................................................................................................34
Figure 7.2 No ledges in current wave with sufficient hysteresis (magenta: current A, yellow & blue:
sense resistor voltages A and B)...................................................................................................................................36
Figure 7.3 spreadCycle chopper scheme showing coil current during a chopper cycle...............................37
Figure 7.4 Classic const. off time chopper with offset showing coil current...................................................38
Figure 7.5 Zero crossing with classic chopper and correction using sine wave offset.................................38
Figure 9.1 Ramp generator velocity trace showing consequent move in negative direction.....................43
Figure 9.2 Illustration of optimized motor torque usage with TMC5031 ramp generator...........................44
Figure 9.3 Ramp generator velocity dependent motor control ............................................................................45
Figure 9.4 Using reference switches (example).........................................................................................................46
Figure 10.1 Function principle of stallGuard2 ............................................................................................................50
Figure 10.2 Example: Optimum SGT setting and stallGuard2 reading with an example motor .................52
Figure 11.1 coolStep adapts motor current to the load .........................................................................................55
Figure 12.1 LUT programming example.......................................................................................................................57
Figure 13.1 Current setting and setting up spreadCycle.........................................................................................59
Figure 13.2 Moving the motor using the motion controller .................................................................................60
Figure 13.3 Enabling coolStep (in combination with spreadCycle) .....................................................................61
Figure 18.1 Layout example.............................................................................................................................................70
Figure 19.1 Dimensional drawings................................................................................................................................71
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