Shenzhen Golden Trees Technology Co., Ltd

Model Number: A4988 Brand Name: New and Original Key Specifications/Special Features: Description:A4988 is a complete microstepping motor driver with built-in translator for easy operationThis product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 AA4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modesA4988 converter is the key to the easy implementation

As long as the "step" input inputting one pulse drives the motor one microstep

There are no phase sequence tables, high frequency control lines, or complex interfaces to program

A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened

In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (slow or mixed)

In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime

Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption

Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption

Internal circuit protection includes: thermal shutdown with hysteresis, under-voltage lockout (UVLO), and crossover-current protection

Special power sequencing

A4988 surface mount QFN package (ES), a size of 5 x5mm, nominal overall package height of 0.90mm, with an exposed pad for enhanced thermal dissipation

This package is Pb (suffix-T), with 100% matte tin lead frame plating

Features:

• Simple step and direction control interface
• Short-to-ground and shorted-load protection
• Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step
• Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
• Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates

Packingincluded:

• 1 x step motor driver module
• 1 x heatsink

Company information:

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