AMIS-30421 - ON Semiconductor

AMIS-30421 Micro-Stepping Stepper Motor Bridge Controller

Name Pin Description GXBL 2 Gate of external NMOS FET of the X bridge bottom left side MOTXP 3 Positive end of phase X−coil GXTL 4 Gate of external NMOS FET of the X bridge top left side GXBR 5 Gate of external NMOS FET of the X bridge bottom right side MOTXN 6 Negative end of phase X−coil GXTR 7 Gate of external NMOS FET of the X bridge top r.

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 Decay
• Low EMC PWM with Selectable Voltage Slopes
• Full Output Protection and Diagnosis
• Thermal Warning and Shutdown
• Compatible with 3.3 V Microcontrollers
• Integrated 3.3 V Regulator to Supply External Microcontroller
• Integrated Reset Function to Reset External Mic.