| Conductive Type: | Standard |
|---|---|
| Operating Temperature: | -40 ~ 175(Celsius) |
| Operating Supply Voltage: | 6V ~ 30V |
|
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The AMIS−30522 is a micro−stepping stepper motor driver for bipolar stepper motors. The chip is connected through I/O pins and a SPI interface with an external microcontroller. The AMIS−30522 contains a current−translation table. It takes the next micro−step depending on the clock signal on the "NXT" input pin and the status of the "DIR" (= direction) register or input pin. The chip
provides a so−called "Speed and Load Angle" output. This allows the creation of stall detection algorithms and control loops based on load−angle to adjust torque and speed. It is using a proprietary PWM algorithm for reliable current control.The AMIS−30522 is implemented in I2T100 technology, enabling both high voltage analog circuitry and digital functionality on the same chip. The chip is fully compatible with the automotive voltage requirements.The AMIS−30522 is ideally suited for general purpose stepper motor
applications in the automotive, industrial, medical and marine environment. The AMIS−30522 is intended for use in industrial
applications.
1.Pin diagram:
2.Absolute Maximum Ratings:
3.Equivalent Schematics:
The following figure gives the equivalent schematics of the user relevant inputs and outputs. The diagrams are simplified representations of the circuits used.
• Dual H−Bridge for 2 Phase Stepper Motors
• Programmable Peak−Current up to 1.2 A Continuous (1.5 A Short Time), Using a 5−Bit Current DAC
• On−Chip Current Translator
• SPI Interface
• Speed and Load−Angle Output
• 7 Step Modes from Full−Step up to 32 Micro−Steps
• Fully Integrated Current−Sense
• PWM Current Control with Automatic Selection of Fast and Slow Decay
• Low EMC PWM with Selectable Voltage Slopes
• Active Fly−back Diodes
• Full Output Protection and Diagnosis
• Thermal Warning and Shutdown
• Digital IO's Compatible with 5 V and 3.3 V Microcontrollers
• Integrated 5 V Voltage Regulator to Supply an External Microcontroller
• Integrated Reset Function to Reset External Microcontroller
• Integrated Watchdog Function
• NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
• These are Pb−Free Devices
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