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Power Supply Controllers, Monitors - MAX15049ETJ+T

The MAX15049ETJ+T is a fan speed PC power supply controller with integrated thermistors. It offers a complete PMIC solution to manage the thermal control of fan adjustable speed DC/DC converters. It operates by monitoring the junction temperature to ensure proper cooling of the DC/DC converter. The MAX15049ETJ+T also provides thermal control of the cooling fan and under voltage protection to ensure proper system operation.

Application field

The MAX15049ETJ+T is intended for use in personal computing systems such as high-end desktop, gaming, and mobile market segments. It is suitable for any type of DC/DC converter system that requires fan speed control, undervoltage protection, and thermal management. It is designed to provide maximum flexibility for a wide range of applications.

Working Principle

The MAX15049ETJ+T is a digital fan speed controller with integrated thermistors. It uses the junction temperature to control the fan speed, thus ensuring proper cooling of the DC/DC converter. The thermistors have a temperature-dependent resistance, and the MAX15049ETJ+T measures the EMI noise at the thermistors to calculate the junction temperature. The temperature measurement is then compared to the temperature settings in an array of look up tables provided by the user, and the fan speed is adjusted accordingly.

The MAX15049ETJ+T also provides undervoltage protection, which prevents the fan from spinning at a speed faster than the power supply can supply. This prevents damage to the fan, as well as providing a stable system environment for the DC/DC converter.

The MAX15049ETJ+T allows the user to adjust the fan speed manually, in order to provide better temperature control and finer fan speed tuning. This can be done using the PMBus commands or using an external pin.

The MAX15049ETJ+T is designed to be integrated into the DC/DC converter system without the need for additional components. It is highly efficient and offers a complete solution for controlling fan speed and assuring proper cooling in PC power supplies.

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