TMC236/A ETC2 [List of Unclassifed Manufacturers], TMC236/A Datasheet

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) ® TRINAMIC Motion Control GmbH & Sternstraß – 20357 Hamburg GERMANY T + + WWW.TRINAMIC.COM INFO@TRINAMIC.COM Features The TMC236 / TMC236A ( dual full bridge driver IC for bipolar stepper motor control applications ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) FEATURES ............................................................................................................................................1 PINNING.................................................................................................................................................5 P ...................................................................................................................................5 ACKAGE CODES PQFP44 D ..........................................................................................................................6 IMENSIONS APPLICATION CIRCUIT / BLOCK DIAGRAM ..................................................................................... .....................................................................................................................................7 IN UNCTIONS LAYOUT CONSIDERATIONS ...............................................................................................................8 CONTROL VIA THE SPI INTERFACE ..................................................................................................9 S ERIAL DATA WORD TRANSMITTED TO S ERIAL DATA WORD TRANSMITTED FROM T YPICAL WINDING CURRENT VALUES ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) SPI ..................................................................................................................23 ILTER ONLY TYPE ESD PROTECTION..............................................................................................................................24 APPLICATION NOTE: EXTENDING THE MICROSTEP RESOLUTION ...........................................25 Copyright © 2004, TRINAMIC Motion Control GmbH & ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 Motion Control GmbH & Co KG. Life support systems are equipment intended to ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) Pinning ANN 1 2 OA1 3 VSA 4 5 TMC 236 / 236A OA2 6 QFP44 7 OA1 8 BRA 9 10 OA2 11 Package codes Type Package TMC236A PQFP44 TMC236 PQFP44 (1) ICs are not tested according to automotive standards, but are usable within the complete automotive temperature range. Copyright © ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) PQFP44 Dimensions Copyright © 2004, TRINAMIC Motion Control GmbH & REF MIN 0.09 G 0.05 H 0.30 I 0. All dimensions are in mm. L: Co-planarity of pins MAX. 1 1.6 0.2 0.15 0.45 0.75 0.08 6 ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) Application Circuit / Block Diagram TMC236A 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 Functions Pin Function VS Motor supply voltage VCC 3 ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 attention to a massive grounding. Depending on the required motor current, either a single massive ground plane or a ground plane plus star connection of the power traces may be used ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 driven in microsteps. Every microstep is initiated by its own telegram. Please refer to the description of the analog mode for details on the waveforms required ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 Bit DAC, where 100%=15/16. The contents of all registers is cleared to “0” on power-on reset or disable via the ENN pin, bringing the chip to a low power standby mode ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 to “0000”, because the chopper is off in this condition. The open load flag will then always be read as inactive (“0”). During overcurrent ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) Protection Functions Overcurrent protection and diagnosis The TMC236 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 terminated at once and all transistors of the bridge are switched off for the rest of the PWM cycle. The error counter is increased by one. If the error counter reaches 3, the bridge remains switched off for 63 PWM cycles and the error flag is read as “ ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) Chopper Principle Chopper cycle / Using the mixed decay feature The TMC236 uses a quiet fixed frequency chopper. Both coils are chopped with a phase shift of 180 degrees. The mixed decay option is realized as a self stabilizing system (pat. fi.), by shortening the fast decay phase, if the ON phase becomes longer ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 mode, the SPI interface is disabled and the SPI input pins have alternate functions. The internal DACs are forced to “ ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 voltage of 0.34V when the internal reference or a reference voltage used. ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 components. Worst events are unclamped switching events, because huge voltages can build up in inductive components and result in a high energy spark going into the driver, which can destroy the power transistors ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 2/3 Vcc respectively 1/3 Vcc. It can be overdriven using an external CMOS level square wave signal. Do not set the frequency higher than 100kHz and do not leave the OSC terminal open! The two bridges are chopped with a phase shift of 180 degrees at the positive and at the negative edge of the clock signal ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 circuit controlled by an external resistor at the SLP pin. ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 MD (non-A-type: device disabled) V Power transistor voltage V ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 voltage 3.0 V ... 5 Bridge supply voltage : … ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 TRIP DAC=”1111” V SRA / SRB overcurrent detection SRS threshold V SRA / SRB comparator offset ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 R Thermal resistance bridge transistor junction to THA14 ambient, one bridge chopping, fixed polarity ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 f SCK frequency SCK t SCK stable before and after CSN ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) ESD Protection Please be aware, that the TMC236 is an ESD sensitive device due to integrated high performance MOS transistors. ESD sensitive device If the ICs are manually handled before / during soldering, special precautions have to be taken to avoid ESD voltages above 100V HBM (Human body model). For automated SMD equipment the internal device protection is specified with 1000V CDM (charged device model), tbf ...

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... TMC236/A DATA SHEET (V2.04 / Nov. 6th, 2006) 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 shows a solution, which adds two LSBs by selectively pulling up the SRA / SRB pin by a small voltage difference. Please remark, that the lower two bits are inverted in the depicted circuit ...