Features :

1. Automatic current decay mode detection/choice.
2. Mixed with slow current decay mode.
3. The low power dissipation of synchronous rectifier.
4. Internal UVLO(ultra voltage lockout).
5. Crossover current protection.
6. Thermal shutdown circuit.
7. Ground fault protection.
8. Loading and short circuit protection.
9. The optional five-step mode: full, 1/2, 1/4, 1/8 and 1/16.

Features :

1. PWM capability of up to 25 kHz combined with active freewheeling.
2. Switched mode current limitation for reduced power dissipation in overcurrent.
3. Status flag diagnosis with current sense capability.
4. Overtemperature shut down with latch behavior.
5. Overvoltage lockout.
6. Undervoltage shut down.
7. Driver circuit with logic level inputs.
8. Adjustable slew rates for optimized EMI.
9. 74AHC244 Schmitt-trigger Octal buffer/line driver for ESD protection (Inputs accepts voltages higher than VCC).

Input port:

1. RPWM: forward level or PWM signal input, active high.
2. LPWM: Reverse level or PWM signal input, active high.
3. R_EN: forward drive enable input, high-level enable, low level off.
4. L_EN: Reverse drive enable input, high-level enable, low level off.
5. R_IS: forward drive current alarm output.
6. L_IS: Reverse drive current alarm output.
7. VCC: +5 V power output, 5V power supply connection with the microcontroller.
8. GND: signal common low end.

Features :

1. Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, and 1/32.
2. Simple step and direction control interface
3. Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
4. Adjustable current control lets you set the maximum current output with a potentiometer. Hence lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates
5. Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
6. 45 V maximum supply voltage
7. Built-in regulator (no external logic voltage supply needed)
8. Can interface directly with 3.3 V and 5 V systems
9. Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
10. Short-to-ground and shorted-load protection
11. 4-layer, 2 oz copper PCB for improved heat dissipation
12. Exposed solderable ground pad below the driver IC on the bottom of the PCB