TMC246/A ETC2 [List of Unclassifed Manufacturers], TMC246/A Datasheet
TMC246/A
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TMC246/A Summary of contents
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) ® TRINAMIC Motion Control GmbH & Sternstraß – 20357 Hamburg GERMANY T + + ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Life support policy TRINAMIC Motion Control GmbH & does not authorize or warrant any of its products for use in life support systems, without the specific written consent of TRINAMIC ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Pinning ANN 1 2 OA1 3 VSA 4 5 TMC 246 / 236A OA2 6 QFP44 7 OA1 8 BRA 9 10 OA2 11 Package codes Type Package TMC246A PQFP44 TMC246 PQFP44 ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) PQFP44 Dimensions Copyright © 2005, TRINAMIC Motion Control GmbH & REF MIN 0.09 G 0.05 H 0.30 I ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Application Circuit / Block Diagram TMC246 OSC OSC 1nF Under- VCC voltage 100nF Tem- perature [MDBN] SCK [PHA] SDI [ERR] SDO [PHB] CSN ENN VCC/2 SPE ANN [MDAN] stand alone mode Pin ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Layout Considerations For optimal operation of the circuit a careful board layout is important, because of the combination of high current chopper operation coupled with high accuracy threshold comparators. Please pay special ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Control via the SPI Interface The SPI data word sets the current and polarity for both coils. By applying consecutive values, describing a sine and a cosine wave, the motor can be ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Typical winding current values Current setting Percentage of current CA3..0 / CB3..0 0000 0% 0001 6.7% 0010 13.3% ... ... 1110 93.3% 1111 100% The current values correspond to a standard 4 ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Open load detection Open load is signaled, whenever there are more than 14 oscillator cycles without PWM switch off. Note that open load detection is not possible while coil current is set ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Stall Detection Using the sensorless load measurement The TMC246 provides a patented sensorless load measurement, which allows a digital read out of the mechanical load on the motor via the serial interface. ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Protection Functions Overcurrent protection and diagnosis The TMC246 uses the current sense resistors on the low side to detect an overcurrent: Whenever a voltage above 0.61V is detected, the PWM cycle is ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Chopper Principle Chopper cycle / Using the mixed decay feature The TMC246 uses a quiet fixed frequency chopper. Both coils are chopped with a phase shift of 180 degrees. The mixed decay ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Classical non-SPI control mode (stand alone mode) The driver can be controlled by analog current control signals and digital phase signals. To enable this mode, tie pin SPE to GND. In this ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Calculation of the external components Sense Resistor Choose an appropriate sense resistor (R current is reached, when the coil current setting is programmed to “1111”. This results in a current sense trip ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Making the circuit short circuit proof In practical applications, a short circuit does not describe a static condition, but can be of very different nature. It typically involves inductive, resistive and capacitive ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Oscillator Capacitor The PWM oscillator frequency can be set by an external capacitor. The internal oscillator uses a 28kΩ resistor to charge / discharge the external capacitor to a trip voltage of ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Slope Control Resistor The output-voltage slope of the full bridge outputs can be controlled to reduce noise on the power supply and on the motor lines and thus electromagnetic emission of the ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Absolute Maximum Ratings The maximum ratings may not be exceeded under any circumstances. Symbol Parameter V Supply voltage (A-type Supply voltage (non-A-type Supply and bridge voltage max. 20000s ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) DC Characteristics DC characteristics contain the spread of values guaranteed within the specified supply voltage and temperature range unless otherwise specified. Typical characteristics represent the average value of all parts. Logic supply ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) (input ENN) V High input voltage threshold OSCH (input OSC) V Low input voltage threshold OSCL (input OSC threshold voltage VTD (referenced to VS) V SRA / SRB voltage at ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Thermal Characteristics Symbol Parameter R Thermal resistance bridge transistor junction to THA12 ambient, one bridge chopping, fixed polarity R Thermal resistance bridge transistor junction to THA22 ambient, two bridges chopping, fixed polarity ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) SPI Interface Timing t ES ENN CSN t 1 SCK SDI SDO Propagation Times (3.0 V ≤ VCC ≤ 5.5 V, -40°C ≤ Tj ≤ 150°C; V unless otherwise specified) Symbol Parameter ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) ESD Protection Please be aware, that the TMC246 is an ESD sensitive device due to integrated high performance MOS transistors. ESD sensitive device If the ICs are manually handled before / during ...
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TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) Application Note: Extending the Microstep Resolution For some applications it might be desired to have a higher microstep resolution, while keeping the advantages of control via the serial interface. The following schematic ...