The HR4988 is a microstepping motor driver with a built-in translator, enabling bipolar stepper motors to operate in full-, half-, 1/4-, 1/8-, and 1/16-step modes. The stepping mode is selected via the MSx logic input pins. Its output drive capability reaches 32V and ±2A. An internal synchronous rectification control circuit improves power dissipation during PWM operation. Internal protection circuitry includes thermal shutdown with hysteresis, undervoltage lockout, and overcurrent protection. No special power-up sequencing is required.
The HR4988 is currently available in a QFN28 package with an exposed thermal pad, which effectively enhances heat dissipation performance; it is a lead-free product and complies with environmental standards.
For complete product specifications, please refer to:
HR4988
Manufacturer: HEROIC
Package: QFN-28(5*5)
Features: RDS(on)=640mΩ/Step Resolution=1;2;4;8;16/Control Voltage=3V to 5.5V/Built-in Converter
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