| Motor Type |
Stepper Motor |
| H bridge |
2 |
| Micro Step |
1/32 |
| VDD (Min) (V) |
3 |
| VDD (Max) (V) |
12 |
| Peak Current (A) |
1.4 |
| Ron (mΩ) |
730 |
| Control Mode |
STEP/DIR |
| CTRL IF |
Hardware(GPIO) |
| Temperature |
-40℃~85℃ |
| Function |
Current Regulation |
| Package (mm) |
QFN 4X4-24L |
3V to 12V Supply Voltage Range
1.4A Full Scale current per H-Bridge
Rdson HS + LS: Typical 0.73Ω
Support up to 1/32th Microstepping
Decay Modes supported:
Adaptive Decay Technology
Mixed Decay
Slow Decay
Fast Decay
Support 1.8V Logic Level
Programmable off-time 10,20, or 30s off-time
Programmable Motor Torque Current
Short-Circuit Protection, Over-Temperature Protection, Under-Voltage Protection
Fault Condition Indication
QFN 4mm X4mm X0.85mm-24L package
The AW8646 is a flexible microstepping stepper motor driver. It is designed to operate bipolar stepper motor with up to 1/32th step mode for mobile phones, tablets, and other automated equipment applications. The device can be controlled by simple STEP/DIR interface allowing easy interfacing to controller circuits. The output block of each H-bridge driver consists of N-channel and P-channel power MOSFETS configured as full H-bridges to drive the motor windings.
Pins allow configuration of the motor in full-step up to 1/32th step modes. Decay mode is configurable so that adaptive decay, slow decay, fast decay, and mixed decay can be used. A low power sleep mode is provided to achieve very-low quiescent current draw.
AW8646 is capable of driving up to 1.4A (Full Scale) or 1A (RMS) current per H-Bridge
The device offers a complete set of protection features including UVLO, overcurrent protection, short circuit protection, and over temperature. Fault conditions are indicated via the nFAULT pin
