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The manipulation of an electric fan’s spinning speed is known as fan control. To ensure proper cooling, a variety of computer fan types are used, and various fan control systems balance the cooling abilities and noise levels of the fans.
Typically, motherboards have hardware monitoring circuitry that the end-user can adjust using the BIOS or other software to perform fan control.
The Global Fan Controller ICs market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
The MAX31760 from Maxim Industries incorporates precision PWM fan control and temperature sensing.
It precisely detects the local chip temperature as well as the remote temperature of a discrete diode-connected transistor, such as a 2N3906, or a thermal diode frequently used in CPUs, GPUs, and other ASICs.
An I2C-compatible interface can specify multiple temperature thresholds, such as local high/overtemperature (OT) and remote high/overtemperature.
The temperature reading serves as an index to a 48-byte lookup table (LUT) with user-programmed PWM values, which is used to control fan speed.
To reduce acoustic fan noise, the user can programme a smooth nonlinear fan speed vs. temperature transfer function using the adaptable LUT-based architecture. Two tachometer inputs enable the independent measurement of the speeds of two fans.
When either a local or remote high-temperature threshold is surpassed, an ALERT pin is dedicated to signalling it. Either fault indicator mode or interrupt mode can be programmed into ALERT.
The device is a small and comprehensive solution for a single-fan or dual-fan cooling system thanks to these capabilities.
