Datasheet

TMC262 DATASHEET (Rev. 2.14 / 2016-JUL-14) 57
www.trinamic.com
22 Table of Figures
Figure 1.1 Applications block diagrams ......................................................................................................................... 4
Figure 2.1 TMC262 pin assignments ................................................................................................................................ 6
Figure 3.1 TMC262 block diagram .................................................................................................................................... 8
Figure 4.1 stallGuard2 load measurement SG as a function of load .................................................................... 9
Figure 4.2 Linear interpolation for optimizing SGT with changes in velocity .................................................. 11
Figure 5.1 Energy efficiency example with coolStep ................................................................................................ 13
Figure 5.2 coolStep adapts motor current to the load ............................................................................................ 14
Figure 6.1 SPI Timing ........................................................................................................................................................ 16
Figure 6.2 Interfaces to a TMC429 motion controller chip and a TMC262 motor driver ............................... 17
Figure 7.1 STEP/DIR timing .............................................................................................................................................. 27
Figure 7.2 Internal microstep table showing the first quarter of the sine wave ........................................... 28
Figure 7.3 microPlyer microstep interpolation with rising STEP frequency ...................................................... 29
Figure 8.1 Sense resistor grounding and protection components ...................................................................... 32
Figure 9.1 Chopper phases .............................................................................................................................................. 33
Figure 9.2 spreadCycle chopper mode showing the coil current during a chopper cycle ........................... 35
Figure 9.3 Constant off-time chopper with offset showing the coil current during two cycles ................ 36
Figure 9.4 Zero crossing with correction using sine wave offset ........................................................................ 36
Figure 10.1 MOSFET gate charge vs. V
DS
for a typical MOSFET during a switching event ............................ 39
Figure 11.1 Short to GND detection timing ................................................................................................................ 40
Figure 11.2 Undervoltage reset timing ......................................................................................................................... 42
Figure 13.1 Start-up requirements of CLK input ........................................................................................................ 44
Figure 15.1 High-current, high-voltage power stage using external gate drivers (minimum part count) 46
Figure 15.2 High-current power stage using external gate drivers with short to GND protection............ 47
Figure 16.1 Layout example ............................................................................................................................................. 49
Figure 19.1 Dimensional drawings ................................................................................................................................ 55