Bộ 5 Mô Đun Điều Khiển Động Cơ Bước Cho Máy In 3d Ramps Reprap A4988 tại Lotte Market

Color: Green,Red
Load short-circuit protection
Internal UVLO
Package Included:5 X A4988 Stepper Driver +5X Heatsink
3.3 and 5 V compatible logic supply
Automatic current decay mode detection / selection
Optional step five modes: full, 1/2, 1/4, 1/8 and 1/16
Synchronous rectification for low power dissipation
Low RDS (On) Output
Ground fault protection
Cross-current protection
Thermal shutdown circuitry
Mix with slow current decay modes
Features:
A4988 is a complete microstepping motor driver with built-in translator for easy operation. This 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 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 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, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.