Datasheet for the HHBY THB6128 high-resolution bipolar stepper motor driver IC, detailing features, pinouts, electrical characteristics, and application notes.
The HHBY THB6128 is a high-resolution bipolar stepper motor driver IC designed for two-phase hybrid stepper motors. It features dual full-bridge MOSFET drivers with a low on-resistance of 0.55Ω and supports a maximum supply voltage of 36VDC with a peak output current of 2.2A. The chip offers multiple microstepping options ranging from 1 to 1/128 and includes built-in thermal and overcurrent protection. This manual is written in Chinese.
| On-resistance (Ron) | 0.55Ω |
|---|---|
| Maximum Supply Voltage | 36VDC |
| Peak Output Current | 2.2A |
| Microstepping Options | 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 |
| Operating Temperature Range | -20～＋85 ℃ |
| Storage Temperature Range | -55～＋150 ℃ |
The chip supports microstepping resolutions of 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, and 1/128.
The drive current is set by adjusting the voltage at the VREF pin according to the formula Io（100%）=VREF*（1/5）*（1/Rs）.
The chip supports Fast Decay, Slow Decay, and Mixed Decay modes, selectable via the FDT pin voltage.