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TMC5031-EVAL Datasheet(PDF) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
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TMC5031-EVAL Datasheet(HTML) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
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10 / 74 page  TMC5031 DATASHEET (Rev. 1.11 / 2016-APR-28) 10 www.trinamic.com 3 Sample Circuits The sample circuits show the connection of the external components in different operation and supply modes. The connection of the bus interface and further digital signals is left out for clarity. 3.1 Standard Application Circuit VCC_IO TMC5031 SPI interface CSN SCK SDO SDI reference switch processing reference switch processing Controller 2 5V Voltage regulator charge pump VCP 22n 100n CLK_IN +VM 5VOUT VSA 4.7µ INT PP INT & position pulse output VCC optional external clock 12-16MHz *) For a reliable start-up it is essential that VCC_IO comes up to a minimum of 1.5V before the TMC5031 leaves the reset condition. Therefore, TRINAMIC recommends using a fast-start-up voltage regulator (e.g. TS3480CX33) in a 3.3V environment. 100n 100n Controller 1 Full Bridge A Full Bridge B +VM VS stepper motor #1 N S O1A1 O1A2 BR1A O1B1 O1B2 Driver 1 100n BR1B Full Bridge A Full Bridge B stepper motor #2 N S O2A1 O2A2 BR2A O2B1 O2B2 Driver 2 BR2B VS 100n +VM 100µF TS3480 CX33*) 3.3V 5V Figure 3.1 Standard application circuit The standard application circuit uses a minimum set of additional components in order to operate the motor. Use low ESR capacitors for filtering the power supply capable to cope with the current ripple. The current ripple often depends on the power supply and cable length. The VCC_IO voltage can be supplied from 5VOUT, or from a fast startup 3.3V regulator. In order to minimize linear voltage regulator power dissipation of the internal 5V voltage regulator in applications where VM is high, a different (lower) supply voltage can be used for VSA, if available. For best motor chopper performance, an optional R/C-filter de-couples 5VOUT from digital noise cause by power drawn from VCC. Basic layout hints Place sense resistors and all filter capacitors as close as possible to the related IC pins. Use a solid common GND for all GND connections, also for sense resistor GND. Connect 5VOUT filtering capacitor directly to 5VOUT and GNDA pin. See layout hints for more details. Low ESR electrolytic capacitors are recommended for VS filtering. Attention In case VSA is supplied by a different voltage source, make sure that VSA does not exceed VS by more than one diode drop upon power up or power down. |
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