| Product Description Reprap Stepper Driver Stepper Motor Driver A4988/DRV8825 For 3D Printer Reprap Stepper Driver Stepper Motor Driver A4988/DRV8825IntroductionThe A4988 is a complete microstep motor driver with built-in converter for easy operation. The product operates bipolar stepper motors in full, half, 1/4, 1/8 and 1/16 step modes with output drive performance up to 35 V and 1 A. The A4988 includes a fixed off-time current regulator that operates in slow or mixed attenuation mode. The converter is the key to the ease of implementation of the A4988. Simply input a pulse into the "step" input to drive the motor to generate a microstep. No phase sequence table, high frequency control line or complex interface programming is required. The A4988 interface is ideal for applications where complex microprocessors are not available or overloaded.The chopping control in the A4988 automatically selects the current decay mode (slow or mixed) during microstep operation. In mixed decay mode, the device is initially set to decay quickly during a partial fixed downtime and then slowly decay during the remaining downtime. Hybrid attenuation current control schemes reduce audible motor noise, increase step accuracy, and reduce power consumption. An internal synchronous rectification control circuit is provided to improve power consumption during pulse width modulation (PWM) operation. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and cross current protection. No special power sequencing is required.The A4988 is available in a surface mount QFN package (ES) measuring 5 mm 5 mm and has a nominal overall package height of 0.90 mm with an exposed heatsink for enhanced heat dissipation. The package is lead (Pb)-free (suffix -T) with a 100% matte tin leadframe.Features and benefitsLow RDS (on) outputAutomatic current decay mode detection/selectionMixed and slow current decay modeLow power dissipation synchronous rectificationInternal UVLOCross current protection3.3 and 5 V compatible logic power suppliesThermal shutdown circuitGround short circuit protectionLoad short circuit protectionFive optional step modes: Full, 1/2, 1/4, 1/8 and 1/16-------------------------------------------------- ---------------- dividing line -------------------------------- ---------------------------DRV8825 vs. 4988 Features:1. The maximum current is 2.5A.2, the highest support for 32 subdivisions.3, 4 layer PCB board, better heat dissipation performance.4, the chip internal resistance is smaller, lower heat, better heat dissipation.parameter:Size: 1.5mmX2mm (same as 4988)Driven current: 2.5ASubdivision: 1, 1/2, 1/4, 1/8, 1/16, 1/32Manufacturing process: SMT placement machine manufacturing, non-manual welding, higher yield, more stable performanceSuitable for:Need to drive the stepper motor.It is a necessary module for building 3d printers, cnc, engraving machines, etc.Supported 3d printers are Prusa Mendel, ultimaker, printbot, makerbot and so on.1. It is suitable for driving stepper motors up to 8.2V~45V 2.5A;2, only simple step and direction control interface;3. Six different stepping modes: full, half, 1/4, 1/8, 1/16, 1/32;4. The adjustable potentiometer can adjust the maximum current output to obtain a higher step rate;5. Automatic current decay mode detection/selection;6, overheat shutdown circuit, undervoltage lockout, cross current protection;7, ground short circuit protection and load short circuit protection
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. Brand Name:SZYTFItem Type:ModuleModel Number:A4988/DRV8825 |
