MAX31790ATI+

Overview

The MAX31790ATI+ is a six-channel PWM fan RPM controller manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 3.0V to 5.5V and draws a maximum operating current of 2.5mA. The device features an output current capability of 3mA per channel and dissipates up to 1.6667W of power. It is housed in a 28-pin TQFN package designed for surface mount installation. The component supports an extended industrial temperature range from -40°C to +125°C, ensuring reliable operation in demanding environments.

Feature Summary

• Controls up to six independent fans using dedicated PWM outputs with precise duty cycle modulation
• Monitors fan tachometer logic outputs for accurate RPM tracking and failure detection
• Utilizes I2C interface for host communication with configurable startup states
• Supports controlled rate-of-change for PWM duty cycles to minimize acoustic noise

Applications

• Server cooling systems
• Networking equipment thermal management
• Telecommunications infrastructure

Procurement Notes

Verify the specific suffix 'ATI+' against official Analog Devices documentation to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer datasheets or certificates of conformity. Ensure the procurement source provides valid traceability for the component batch. Cross-reference the ordering information section in the official datasheet for any recent manufacturing changes or obsolescence notices prior to finalizing orders.

Selection Notes

Select this component when designing systems requiring centralized control of multiple cooling fans via a digital interface. The integrated tachometer inputs allow for closed-loop speed regulation without external microcontrollers for basic monitoring. Consider the 28-pin TQFN footprint for PCB layout constraints. Verify that the host system's I2C bus voltage levels are compatible with the 3.0V to 5.5V operating range of the controller.

Part Context

The MAX31790 belongs to the Maxim Integrated family of power management and motor control ICs. It is specifically categorized under Fan/Motor Controllers/Drivers within the PMIC segment. This part enables efficient thermal management in high-density electronic assemblies where precise fan speed adjustment and reliability monitoring are critical for system longevity and performance stability.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.