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SKU:64004503
Features： 1. Low RDS (on) output 2. Automatic current attenuation mode detection/selection 3. Mixed and slow current decay modes 4. Synchronous rectification for low power dissipation 5. Internal UVLO 6. Cross current protection 7. 3.3 and 5 V compatible logic power 8. Thermal shutdown circuit 9. Earth short circuit protection 10. Load short circuit protection 11. Five selectable step modes: full, 1/2, 1/4, 1/8, and 1/16 In microstep operation, the chopping control in A4988 can automatically select the current decay mode (slow or mixed). In the mixed decay mode, the device is initially set to decay rapidly during part of the fixed downtime, and then decay slowly during the remaining downtime. A mixed attenuation current control scheme can reduce audible motor noise, increase step accuracy, and reduce power consumption. Provides internal synchronous rectification control circuit 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. Package included: 6 x DRV8825 Stepper Motor Driver Board 6 x Heatsink
A4988 is a complete microstepping motor driver with built-in converter, easy to operate.
The product can operate bipolar stepper motors in full, half, 1/4, 1/8 and 1/16 stepping modes, with output drive performance up to 35 V and ±1 A.
Onboard a fixed off-time current regulator that can operate in slow or mixed decay modes.
No need for phase sequence table, high frequency control line or complicated interface programming.
The A4988 interface is ideal for applications where complex microprocessors are unavailable or overloaded.
