If this is not your local representative, find your local sales rep here. For both package styles, the thermally enhanced pins are at ground potential and need no electrical isolation. Add to cart Add to wish list. Feedback Comments or questions? For instance, driving a motor in quarter-step mode will give the step-per-revolution motor microsteps per revolution by using four different current levels. Like nearly all our other carrier boards, this product ships with all surface-mount components—including the A driver IC—installed as shown in the product picture.
|Date Added:||1 June 2004|
|File Size:||46.23 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
Unipolar motors with five leads cannot be used with this driver. Stepper motors typically have a step size specification e. Please note that measuring the current draw at the power supply does not necessarily provide an accurate measure of the coil current. Select variant Several alternatives are available for this product. For allwgro package styles, the thermally enhanced pins are at ground potential and need no electrical isolation.
For the microstep modes to function correctly, the current limit must be set low enough see below so that current limiting gets engaged.
The tabs are at ground potential and need no insulation. For the microstep modes to function correctly, the current limit must be set low enough see below so that current limiting gets engaged. Alternatives available with variations in these parameter s: Otherwise, the intermediate current levels will not be correctly maintained, and the motor will effectively operate in a full-step mode.
Internal circuit protection includes: The A includes a fixed off-time current regulator that has the ability to operate in Slow, Fast, or Mixed decay modes. Power connections The driver requires a logic supply voltage 3 — 5.
The A interface is an ideal fit for applications where a complex microprocessor is unavailable or is overburdened.
The A is designed to drive one winding of a bipolar stepper motor in a microstepping mode. By simply inputting one pulse on the STEP input the motor will take one step full, half, quarter, or eighth depending on two logic inputs.
Allegro MicroSystems – A Full-Bridge PWM Microstepping Motor Driver
Click the image to view larger. Shop Blog Forum Support. If this is not your local representative, find your local sales rep here. The interface is an ideal fit for applications where a complex microprocessor is unavailable or overburdened.
Allegro MicroSystems – A Microstepping Driver with Translator
For details about these power states, see the datasheet. One way to set the current limit is to put the driver into full-step mode and to measure the current running through a single motor coil without clocking the STEP input. Special power-up sequencing is microstspping required. Please note that the current limit is dependent on the Vdd voltage.
See the A datasheet for more information.
A5985: DMOS Microstepping Driver with Translator and Overcurrent Protection
The ref pin voltage is accessible on a via that is circled on the bottom silkscreen of the circuit board. The A is a complete microstepping motor microsepping with built-in translator. Add to cart Add to wish list. The following picture shows how to identify which current sense resistors your board has:. A to A Application Note. If this is not your local representative, find your local sales rep here.
Take care when handling this product and other components connected to it. Simple step and direction control interface Five different step resolutions: This carrier board uses low-ESR ceramic capacitors, which makes it susceptible to destructive LC voltage spikesespecially when using power leads longer than a few inches. This micrlstepping can get hot enough to burn you long before the chip overheats.