AMIS30421C4211G

Overview

The AMIS30421C4211G is a bipolar stepper motor driver IC manufactured by onsemi. It operates within a supply voltage range of 3V to 3.6V and utilizes an SPI interface for communication. The device is housed in a 44-QFN (7x7) package with exposed pad. It supports step resolutions from 1 to 1/64 and features four half-bridge pre-drivers. The component is rated for junction temperatures between -40°C and 125°C.

Feature Summary

• Integrated controller providing commutation and direction management capabilities
• Supports variable step resolution ranging from full step to 1/64 microstepping
• Four-channel half-bridge output configuration for bipolar stepper motors

Applications

• General purpose stepper motor control systems
• Embedded motion control applications requiring low voltage operation

Procurement Notes

Verify current availability status as the part is marked as obsolete. Confirm that the 44-QFN package dimensions match the target PCB footprint. Ensure the design accommodates the exposed thermal pad for adequate heat dissipation. Validate that the system power supply strictly adheres to the 3V to 3.6V operating range to prevent damage.

Selection Notes

Select this component for designs requiring a dedicated bipolar stepper driver with SPI control. It is suitable for space-constrained applications due to the compact QFN package. Consider the limited voltage headroom when designing the power stage. Verify compatibility with the host microcontroller's SPI protocol and pinout requirements before integration.

Part Context

This IC belongs to the AMIS30421 family of motor controllers. It serves as a specialized solution for driving bipolar stepper motors in low-voltage environments. The device integrates necessary logic and power stages into a single chip, simplifying the overall system architecture compared to discrete solutions.

Replacement Considerations

No public confirmed substitute part numbers are available.