This product is a consumable product, and the product is completely new and tested and released without

Quality assurance, no return or exchange if there is any problem, please be careful if you mind!

Note: A4988 green is the same as red as red

Brief introduction

The A4988 is a complete microstep motor driver with a built-in converter for easy operation.The product can operate bipolar stepper motors in full, half, 1/4, 1/8 and 1/16 step modes, with output drive performance up to 16V and ±1 A.Generally 12V, the A4988 includes a fixed shutdown time current regulator that can operate in slow or mixed attenuation modes.The converter is the key to the A4988's ease of implementation.Just enter a pulse in the "Step" input to drive the motor to generate microsteps.No phase order tables, high frequency control rows or complex interface programming is required.The A4988 interface is ideal for complex microprocessors that are unavailable or overloaded.

During the micro -step operation, the cutting control in the A4988 can automatically select the current attenuation mode (slow or mixed).In the mixed attenuation mode, the device was initially set to quickly attenuate within some fixed shutdown time, and then slow at the remaining stop time.Hybrid declining current control schemes can reduce the noise noise of motor, increase step progress, and reduce power consumption.Provide internal simultaneous rectifier control circuits to improve the power consumption when the pulse width modulation (PWM) operation.Internal circuit protection includes: lagging overheating shutdown, underold voltage lock (UVLO) and cross -current protection.There is no need for special power sorting.

The A4988 uses the surface installation QFN package (ES), the size is 5 mm × 5 mm, the overall packaging height is 0.90 mm, and the exposed heat sink is also used to enhance the heat dissipation function.The packaging is a lead -free package (suffix -T), and a fog tin plating pins.

Function and advantages

• Low RDS (open)Output
• Automatic current attenuation mode detection/selection
• Mixed and slow current attenuation mode
• Synchronization and rectification for low power consumption
• Internal UVLO
• Cross -current protection
• 3.3 and 5 V compatible logic power supply
• Overheating circuit
• Local short -circuit protection
• Load short -circuit protection
• Five optional step mode: Quan, 1/2, 1/4, 1/8, and 1/16

DRV8825 Compared with 4988 Features:

1. current 2.5A.

2. Support 32 segmentation.

3, 4 layers of PCB boards, better heat dissipation performance.

4. The chip internal resistance is smaller, the heat is lower, and the heat dissipation is better.

parameter:

Size: 1.5mmx2mm (the same as 4988)

Drive current: 2.5A

Segmentation: 1, 1/2, 1/4, 1/8, 1/16, 1/32

Manufacturing process: SMT patch machine manufacturing, non -handmade welding, higher yield rate, more stable performance

Suitable object:

You need to drive the step motor.

It is a module such as 3D printer, CNC, sculptor.

The supported 3D printers include Prusa Mendel, Ultimaker, Printbot, MakerBot, etc.

1. Suitable for stepping motors below 8.2V ~ 45V 2.5A;

2. There are only simple steps and direction control interfaces;

3. Six different step mode: full, half, 1/4, 1/8, 1/16, 1/32;

4. The adjustable potentiometer can adjust the current output to obtain a higher step rate;

5, automatic current attenuation mode detection/selection;

6. Overheating shutdown circuit, under pressure lock, cross -current protection;

7. Short -circuit protection and loading short -circuit protection

A4988/DRV8825 unit expansion board: https://item.taobao.com/item.htm?spm=a2oq0.12575281.0.0.50111debzJoQzv&ft=t&id=42218930103

A4988/DRV8825 4-bit expansion board: https://item.taobao.com/item.htm?spm=a2oq0.12575281.0.0.50111debzJoQzv&ft=t&id=40091947832

A4988/DRV8825 3-bit expansion board + NANO motherboard: https://item.taobao.com/item.htm?spm=a2oq0.12575281.0.0.50111debzJoQzv&ft=t&id=43627750074