Key facts
- Brand
- HHBY
- Model
- THB6128
- Documents
- 3
- Languages
- ZH
- Last added
- 2026-10-19
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HHBY THB6128 Stepper Motor Driver Chip User Manual
This manual describes the THB6128 hybrid stepping motor driver chip, including its pinout, electrical parameters, and functional features such as microstepping, decay mode selection, and standby operation. Detailed tables list maximum ratings, operating ranges, and characteristic curves for designers.
The document also explains how to configure the driver via pins for enable, reset, direction, and current setting, and provides guidelines for setting chopping frequency and protecting against short‑circuit conditions. Contact information for the manufacturer is included at the end. This manual is written in Chinese.
HHBY THB6128 specifications
| 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 ℃ |
Source: HHBY THB6128 High-Resolution Bipolar Stepper Motor Driver Datasheet
All HHBY THB6128 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What are the available microstepping resolutions for the THB6128?
The chip supports microstepping resolutions of 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, and 1/128.
From: HHBY THB6128 High-Resolution Bipolar Stepper Motor Driver Datasheet
How is the drive current set on the THB6128?
The drive current is set by adjusting the voltage at the VREF pin according to the formula Io（100%）=VREF*（1/5）*（1/Rs）.
From: HHBY THB6128 High-Resolution Bipolar Stepper Motor Driver Datasheet
Which pin enables or disables the driver output?
The ENABLE pin is active low; when it is low the output is forced off, and when high the driver operates normally.
How do I set the microstepping mode?
Microstepping is selected using the ML, M2, and M3 pins; each pin corresponds to a specific division factor such as 1/2, 1/4, 1/8, etc.