AMIS-30421 Description
AMIS-30421 Micro-Stepping Stepper Motor Bridge Controller Introduction The AMIS−30421 is a micro-stepping stepper motor bridge controller for large current range bipolar applications. The chip interfaces via a SPI interface with an external controller in order to control 2 external power NMOS H−bridges. It has an on-chip voltage regulator, current sensing, self adapting PWM controller and pre-driver with smart slope...
AMIS-30421 Key Features
- Dual H-Bridge Pre-Drivers for 2-Phase Stepper Motors
- Programmable Current via SPI
- On-chip Current Translator
- SPI Interface
- Speed and Load Angle Output
- 8 Step Modes from Full Step up to 64 Micro-Steps
- Current-Sense via Two External Sense Resistors
- PWM Current Control with Automatic Selection of Fast and Slow
- Low EMC PWM with Selectable Voltage Slopes
- Full Output Protection and Diagnosis
AMIS-30421 Applications
- Dual H−Bridge Pre−Drivers for 2−Phase Stepper Motors