3D printer driver module CJMCU stepper motor driver A4988 A4983

3D printer driver module CJMCU stepper motor driver A4988 A4983
IntroductionThe A4988 is a complete microstepping 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 stepping modes with output drive capability of 35 V and ± 2 A. The A4988 includes a fixed off-time current regulator that operates in slow or mixed-attenuation mode. The converter is the key to easy implementation of the A4988. As long as you enter a pulse in the Step input, you can drive the motor to generate a microstep. Without the need for phase sequence table, high frequency control lines or complex interface programming. The A4988 interface is ideal for applications where complex microprocessors are unavailable or overloaded.During microstep operation, the chopper control in the A4988 automatically selects the current decay mode (slow or mixed). In the mixed-attenuation mode, the device is initially set to decay quickly during a fraction of the fixed stop time and then decay slowly for the rest of the downtime. The hybrid attenuation current control scheme reduces audible motor noise, increases step accuracy and reduces power consumption. An internal synchronous rectification control circuit is provided to improve power dissipation 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) with dimensions of 5 mm x 5 mm and a nominal overall package height of 0.90 mm with an exposed heat sink to enhance heat dissipation. The package is lead-free (suffix-T) and is plated with 100% matte tin leadframe.
Functions and advantages Low RDS (on) output
Automatic current decay mode detection / selection
Mixed and slow current decay modes
Synchronous rectification for low power dissipation
Internal UVLO
Cross current protection
3.3 and 5 V compatible logic power supplies
Thermal shutdown circuit
Grounding short-circuit protection
Load short circuit protection
Five selectable step modes: full, 1/2, 1/4, 1/8 and 1/16Our Product Line: How to Contact US?Send your Inquiry Details in the Below, Click "Send" Now!