The TMC249 is a smart high current microstepping driver for bipolar stepper motors. The integrated unique sensorless stall detection stallGuard™ makes it a good choice for applications, where a reference point is needed, but where a switch cannot be used. The ability to predict an overload makes the TMC249 an optimum choice for drives, where a high reliability is desired. It provides an SPI™ interface as well as the classical analog / digital control. A full set of protection and diagnostic features makes this device very rugged. It directly drives external MOSFETs for currents up to 6A. This way it reaches an extremely high efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures. With the new chip-scale QFN package a 4A motor driver can be realized on the size of a stamp! The high motor current makes this device ideal for miniaturized highly dynamic and high torque drive systems.
Specifications
2-phase bipolar stepper motor driver
Sensorless stall detection stallGuard™ and load measurement integrated
Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals
Short circuit and over temperature protection integrated
Overvoltage protection integrated
Status flags for overcurrent, open load, over temperature, temperature pre-warning, undervoltage
Integrated 4 bit DACs allow up to 16 times microstepping via SPI, any resolution via analog control
Mixed decay feature for smooth motor operation
Slope control user programmable to reduce electromagnetic emissions
Chopper frequency programmable via a single capacitor or external clock
Current control allows cool motor and driver operation
Internal open load detector
7V to 34V motor supply voltage
More than 6000mA using 8 external MOS transistors
External drivers can be added for higher motor voltages and higher currents (e.g. 50V, 5A)
Only 4 external PMOS transistors required for unipolar operation
3.3V or 5V operation for digital part
Low power consumption via low RDS-ON power stage
Standby and shutdown mode available
The TMC249 is a smart high current microstepping driver for bipolar stepper motors. The integrated unique sensorless stall detection stallGuard™ makes it a good choice for applications, where a reference point is needed, but where a switch cannot be used. The ability to predict an overload makes the TMC249 an optimum choice for drives, where a high reliability is desired. It provides an SPI™ interface as well as the classical analog / digital control. A full set of protection and diagnostic features makes this device very rugged. It directly drives external MOSFETs for currents up to 6A. This way it reaches an extremely high efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures. With the new chip-scale QFN package a 4A motor driver can be realized on the size of a stamp!
The high motor current makes this device ideal for miniaturized highly dynamic and high torque drive systems.
Specifications
- 2-phase bipolar stepper motor driver
- Sensorless stall detection stallGuard™ and load measurement integrated
- Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals
- Short circuit and over temperature protection integrated
- Overvoltage protection integrated
- Status flags for overcurrent, open load, over temperature, temperature pre-warning, undervoltage
- Integrated 4 bit DACs allow up to 16 times microstepping via SPI, any resolution via analog control
- Mixed decay feature for smooth motor operation
- Slope control user programmable to reduce electromagnetic emissions
- Chopper frequency programmable via a single capacitor or external clock
- Current control allows cool motor and driver operation
- Internal open load detector
- 7V to 34V motor supply voltage
- More than 6000mA using 8 external MOS transistors
- External drivers can be added for higher motor voltages and higher currents (e.g. 50V, 5A)
- Only 4 external PMOS transistors required for unipolar operation
- 3.3V or 5V operation for digital part
- Low power consumption via low RDS-ON power stage
- Standby and shutdown mode available
