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參數(shù)資料
| 型號： | TMC249A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnostics and SPI Interface |
| 中文描述： | 大電流微步步進電機驅(qū)動器，帶有傳感器的失速檢測，保護/診斷和SPI接口 |
| 文件頁數(shù)： | 25/25頁 |
| 文件大?。?/td> | 219K |
| 代理商： | TMC249A |
TMC249 / TMC249A DATA SHEET (V2.02 / Aug 12th, 2005)
25
Copyright 2005, TRINAMIC Motion Control GmbH & Co KG
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. A full scale sense voltage of 340mV is
assumed. The circuit still takes advantage of completely switching off of the coils when the internal
DAC bits are set to “0000”. This results in the following comparator trip voltages:
Current setting
(MSB first)
0000xx
0 V
000111
5.8 mV
000110
11.5 mV
000101
17.3 mV
000100
23 mV
...
111101
334.2 mV
111100
340 mV
SPI bit
15
14
13
12
11
DAC bit
/B1
/B0
/A1
/A0
MDA
SPI bit
7
6
5
4
3
DAC bit
A2
PHA
MDB
B5
B4
Trip voltage
10
A5
2
B3
9
A4
1
B2
8
A3
0
PHB
R
S
SRA
TMC236 /
TMC239
110R
4.7nF
opt.
74HC595
C1
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q7'
/MR
C2
/OE
SCK
SDI
SDO
CSN
+V
CC
DS1D
100K
/CS
SDI
SCK
SDO
Free for
second
TMC239
47K
47K
47K
/DACA.0
/DACA.1
/DACB.0
/DACB.1
Vcc = 5V
1/2 74HC74
C
D
Q
Note: Use a 74HC4094
instead of the HC595 to get
rid of the HC74 and inverter
i
SPI is a trademark of Motorola
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相關代理商/技術參數(shù) |
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|---|---|
| TMC249-A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Current Microstep Stepper Motor Driver with Sensorless Stall D e t e c t i o n ,P rotection / Diagnosis and SPI Interface |
| TMC249A-LA | 制造商:Trinamic 功能描述:IC BRIDGE DRIVER SPI/ANLG 32QFN |
| TMC249A-SA | 制造商:Trinamic 功能描述:STEPPER MOTOR DRIVER SMD SO-28 制造商:Trinamic 功能描述:STEPPER MOTOR DRIVER, SMD, SO-28 制造商:Trinamic 功能描述:IC MOTOR DRIVER, FULL BRIDGE, 1mA SOIC-28; Motor Type:Full Bridge; No. of Outputs:8; Output Current:1mA; Output Voltage:34V; Driver Case Style:SOIC; No. of Pins:28; Supply Voltage Min:3V; Supply Voltage Max:5.5V; MSL:MSL 2 - 1 year ;RoHS Compliant: Yes |
| TMC249-EVAL | 制造商:Trinamic 功能描述:EVALUATION BOARD FOR TMC249 |
| TMC249-HVHR | 制造商:TRINAMIC 制造商全稱:TRINAMIC 功能描述:Evaluation Board for TMC249 with High Voltage and High Resolution |
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