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| 型號(hào)： | 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(jìn)電機(jī)驅(qū)動(dòng)器，帶有傳感器的失速檢測(cè)，保護(hù)/診斷和SPI接口 |
| 文件頁(yè)數(shù)： | 10/25頁(yè) |
| 文件大?。?/td> | 219K |
| 代理商： | TMC249A |
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TMC249 / TMC249A DATA SHEET (V2.02 / Aug 12th, 2005)
10
Copyright 2005, TRINAMIC Motion Control GmbH & Co KG
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
and undervoltage or overtemperature conditions, the open load flags also become active!
Due to their principle, the open load flags not only signal an open load condition, but also a torque loss
of the motor, especially at high motor velocities. To detect only an interruption of the connection to the
motor, it is advised to evaluate the flags during stand still or during low velocities only (e.g. for the first
or last steps of a movement).
Standby and shutdown mode
The circuit can be put into a low power standby mode by the user, or, automatically goes to standby
on Vcc undervoltage conditions. Before entering standby mode, the TMC249 switches off all power
transistors, and holds their gates in a disable condition using high ohmic resistors. In standby mode
the oscillator becomes disabled and the oscillator pin is held at a low state. The standby mode is
available via the interface in SPI-mode and via the ENN pin in non-SPI mode.
The shutdown mode even reduces supply current further. It can only be entered in SPI-mode by
pulling the ENN pin high. In shutdown additionally all internal reference voltages become switched off
and the SPI circuit is held in reset.
Power saving
The possibility to control the output current can dramatically save energy, reduce heat generation and
increase precision by reducing thermal stress on the motor and attached mechanical components.
Just reduce motor current during stand still: Even a slight reduction of the coil currents to 70% of the
current of the last step of the movement, halves power consumption! In typical applications a 50%
current reduction during stand still is reasonable.
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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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