Datasheet

TMC2590 DATASHEET (V1.0 / 2019-FEB-22) 63
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22 Table of Figures
Figure 1.1 Applications block diagrams ......................................................................................................................... 4
Figure 2.1 TMC2590 pin assignments .............................................................................................................................. 6
Figure 3.1 TMC2590 block diagram and application schematic ............................................................................... 8
Figure 2 Standard application circuit .............................................................................................................................. 9
Figure 3 Standalone configuration ................................................................................................................................ 10
Figure 5.1 StallGuard2 load measurement SG as a function of load .................................................................. 11
Figure 5.2 Linear interpolation for optimizing SGT with changes in velocity .................................................. 13
Figure 6.1 Energy efficiency example with CoolStep ............................................................................................... 15
Figure 6.2 CoolStep adapts motor current to the load ........................................................................................... 16
Figure 7.1 SPI Timing ........................................................................................................................................................ 18
Figure 7.2 Interfaces to a TMC429 motion controller chip and a TMC2590 motor driver ............................. 19
Figure 8.1 STEP/DIR timing .............................................................................................................................................. 31
Figure 8.2 Internal microstep table showing the first quarter of the sine wave ........................................... 32
Figure 8.3 MicroPlyer microstep interpolation with rising STEP frequency ...................................................... 33
Figure 9.1 Sense resistor grounding and protection components ...................................................................... 36
Figure 10.1 Chopper phases ............................................................................................................................................ 37
Figure 10.2 No ledges in current wave with sufficient hysteresis (magenta: current A, yellow & blue:
sense resistor voltages A and B) ................................................................................................................................... 39
Figure 10.3 SpreadCycle chopper scheme showing coil current during a chopper cycle ............................. 40
Figure 10.4 Constant off-time chopper with offset showing the coil current during two cycles .............. 41
Figure 10.5 Zero crossing with correction using sine wave offset...................................................................... 42
Figure 11.1 MOSFET gate charge vs. V
DS
for a typical MOSFET during a switching event ............................ 44
Figure 12.1 Short detection timing ................................................................................................................................ 45
Figure 12.2 Undervoltage reset timing ......................................................................................................................... 48
Figure 14.1 Start-up requirements of CLK input ........................................................................................................ 50
Figure 16.1 Schematic of TMC2590-EVAL (power part) ............................................................................................. 53
Figure 16.2 Layout example ............................................................................................................................................. 54
Figure 19.1 Dimensional drawings ................................................................................................................................ 60