Electronic Components Datasheet Search |
|
TMC246 Datasheet(PDF) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
|
TMC246 Datasheet(HTML) 10 Page - TRINAMIC Motion Control GmbH & Co. KG. |
10 / 28 page TMC246 / TMC246A DATA SHEET (V2.06 / 2011-Aug-10) 10 Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG Typical winding current values Current setting CA3..0 / CB3..0 Percentage of current Typical trip voltage of the current sense comparator (internal reference or analog input voltage of 2V is used) 0000 0% 0 V (bridge continuously in slow decay condition) 0001 6.7% 23 mV 0010 13.3% 45 mV ... ... 1110 93.3% 317 mV 1111 100% 340 mV 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. All SPI inputs have Schmitt-Trigger function. Base current control via INA and INB in SPI mode In SPI mode, the IC can use an external reference voltage for each DAC. This allows the adaptation to different motors. This mode is enabled by tying pin ANN to GND. A 2.0V input voltage gives full scale current of 100%. In this case, the typical trip voltage of the current sense comparator is determined by the input voltage and the DAC current setting (see table above) as follows: VTRIP,A = 0.17 VINA “percentage SPI current setting A” VTRIP,B = 0.17 VINB “percentage SPI current setting B” A maximum of 3.0V VIN is possible. Multiply the percentage of base current setting and the DAC table to get the overall coil current. It is advised to operate at a high base current setting, to reduce the effects of noise voltages. This feature allows a high resolution setting of the required motor current using an external DAC or PWM-DAC (see schematic for examples). 47K 100nF AGND INA INB ANN µC- PWM using PWM signal 100K µC- Port .2 8 level via R2R-DAC 100K 100K µC- Port .1 µC- Port .0 R1 2 level control µC- Port 10nF Controlling the power down mode via the SPI interface Standard function 11 MxA 10 CA3 9 CA2 6 PhA - 0 - Control word function - - Bit Enable standby mode and clear error flags 8 CA1 7 CA0 5 MxB 4 CB3 3 CB2 0 PhB 2 CB1 1 CB0 0 0 0 0 0 0 0 Programming current value “0000” for both coils at a time clears the overcurrent flags and switches the TMC246 into a low current standby mode with coils switched off. |
Similar Part No. - TMC246 |
|
Similar Description - TMC246 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |