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A4988 Current Limit: How to Set A4988 Driver Current Limit?

Setting the A4988 current limit is crucial for ensuring optimal performance and preventing overheating of the motor and the driver itself. The A4988 allows you to adjust the A4988 current limit by manipulating the voltage on the VREF pin.

Here’s a step-by-step guide on how to set the current limit on the A4988:

Steps To Set Current Limit On A4988:

Understand the A4988 Pinout: Familiarize yourself with the A4988 pinout, particularly the VREF pin, which is used to set the A4988 current limit.

Determine the Desired Current: Know the current specification of your stepper motor. This information is typically provided in the stepper motor datasheet.

Identify the Sense Resistor Value: Check the A4988 module or datasheet to find the value of the sense resistor (often around 0.05 ohms). This value is needed for the A4988 current limit calculation.

Read More: A4988 Current Limit

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TDK Corporation has extended its range of EPCOS PTC-based inrush current limiters. The four new versions of the B5921*J0130A020 series with plastic housing are designed for voltages from 280 V AC to 560 V AC, offer rated resistances from 22 Ω to 100 Ω at 25 °C and have a heat capacity of up to 2.3 J/K. They are UL approved and are qualified to AEC-Q200.

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