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TMC261-PA Datasheet(PDF) 8 Page - TRINAMIC Motion Control GmbH & Co. KG. |
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TMC261-PA Datasheet(HTML) 8 Page - TRINAMIC Motion Control GmbH & Co. KG. |
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8 / 53 page  TMC260 and TMC261 DATASHEET (Rev. 2.05 / 2012-NOV-05) 8 www.trinamic.com 3 Internal Architecture Figure 3.1 shows the internal architecture of TMC26O and TMC261. +VM +VM VHS 5V linear regulator 5VOUT 470nF VS GND slope HS slope LS SRA D ENABLE 5V supply TMC260 / TMC261 OSC 15MHz CSN D SCK SDI D D SDO D RSENSE SPI interface Chopper logic 150mΩ for 1.8A peak (resp. 1A peak) Provide sufficient filtering capacity near bridge supply (electrolyt capacitors and ceramic capacitors) S D G S D G motor coil A S D G S D G P-Gate drivers Short to GND detectors N-Gate drivers Break before make VHS +5V 9 DAC VM-10V linear regulator 100n 16V 100n Protection & Diagnostics +VM slope HS slope LS RSENSE Chopper logic 150mΩ for 1.8A peak (resp. 1A peak) S D G S D G motor coil B S D G S D G P-Gate drivers Short to GND detectors N-Gate drivers Break before make VHS +5V 9 DAC ENABLE ENABLE Step & Direction interface Step multiply 16 à 256 Sine wave 1024 entry M U X STEP D DIR D Temperature sensor 100°C, 150°C CoolStep Energy efficiency stallGuard 2 Clock selector CLK D SG_TST Digital control D SHORT TO GND BACK EMF CLK 8-20MHz SIN & COS Phase polarity Phase polarity VCC_IO D D TEST_SE 3.3V or 5V +VCC 100n 9-39V / 9-59V step & dir (optional) SPI stallGuard output TEST_ANA 10R 10R optional input protection resistors against inductive sparks upon motor cable break VREF OA1 OA2 VSA BRA SRB BRB OB2 OB1 VSB Figure 3.1 TMC260 and TMC261 block diagram PROMINENT FEATURES INCLUDE: Oscillator and clock selector provide the system clock from the on-chip oscillator or an external source. Step and direction interface uses a microstep counter and sine table to generate target currents for the coils. SPI interface receives commands that directly set the coil current values. Multiplexer selects either the output of the sine table or the SPI interface for controlling the current into the motor coils. Multipliers scale down the currents to both coils when the currents are greater than those required by the load on the motor or as set by the CS current scale parameter. DACs and comparators convert the digital current values to analog signals that are compared with the voltages on the sense resistors. Comparator outputs terminate chopper drive phases when target currents are reached. Break-before-make and gate drivers ensure non-overlapping pulses, boost pulse voltage, and control pulse slope to the gates of the power MOSFETs. On-chip voltage regulators provide high-side voltage for P-channel MOSFET gate drivers and supply voltage for on-chip analog and digital circuits. |
Similar Part No. - TMC261-PA |
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Similar Description - TMC261-PA |
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