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Note: A4988 green and red are the same as 1A  
 
Introduction
 
       A4988 is a complete micro-stepping motor driver with a built-in converter for easy operation. The product can operate bipolar stepping motors in full, half, 1/4, 1/8 and 1/16 stepping modes, and the output drive performance can reach 35 V and ±1 A. A4988 includes a fixed off-time current regulator, which can work in slow or mixed decay mode. The converter is the key to easy implementation of A4988. Just input a pulse in the "step" input to drive the motor to generate microsteps. No need for phase sequence table, high frequency control line or complicated interface programming. The A4988 interface is very suitable for applications where complex microprocessors are unavailable or overloaded.
 
       During micro-step operation, the chopper control in A4988 can automatically select the current decay mode (slow or mixed). In the mixed decay mode, the device is initially set to decay quickly during part of the fixed downtime, and then slowly decay during the rest of the downtime. The mixed decay current control scheme can reduce audible motor noise, increase step accuracy and reduce power consumption. Provides internal synchronous rectification control circuit to improve power consumption during pulse width modulation (PWM) operation. Internal circuit protection includes: thermal shutdown with hysteresis, under voltage lockout (UVLO) and cross current protection. No special power-on sequencing is required.
 
        The A4988 adopts a surface mount QFN package (ES) with a size of 5 mm × 5 mm, a nominal overall package height of 0.90 mm, and an exposed heat sink to enhance heat dissipation. The package is a lead-free package (suffix -T), using 100% matte tin plating lead frame.
 
 
 
Functions and advantages
Low R DS (open) output
Automatic current decay mode detection/selection
Mixed and slow current decay mode
Synchronous rectification for low power dissipation
Internal UVLO
Cross current protection
3.3 and 5 V compatible logic power supply
Thermal shutdown circuit
Ground short circuit protection
Load short circuit protection
Five optional stepping modes: full, 1/2, 1/4, 1/8 and 1/16
 
 
 
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Exchange or return policy



Every item comes with a 30-day warranty. However, there are certain conditions that apply:

  1. The customer should not be responsible for any self-inflicted damage, such as incorrect power connections (for example, supplying 5V instead of the required 3.3V for a sensor).

  2. The product must be in perfect condition, without any breakage or damage caused by electricity (e.g., short circuits leading to electrical fires).

  3. The store does not accept product exchanges due to customer misunderstandings, such as purchasing the wrong size for their project or buying something without eventually using it. Customers can inquire about the product details and ensure compatibility before making a purchase by contacting us through our Line account @modulemore during business hours. Please note that there may be delays in response between 12:00 PM and 2:00 PM.

Return Policy: To initiate a product return, customers must provide the original receipt or a copy for quick verification. Returns can be sent to our store address by following these guidelines:

  1. Provide a detailed description of the damaged item(s).
  2. Mention any tests or experiments conducted by the customer.

Please note that the store reserves the right to make the final decision regarding product replacement or refund.

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Last updatedSep 7, 2025

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Arduino compatible board, Iot, ESP32, ESP8266, Nodemcu, Raspberry pi, micro:bit and etc.
Mobile number : 0831710868
E-mail : paheyisoicus@gmail.com
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