W83791G

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PMIC - Thermal Management

The W83791G is a programmable embedded computer thermal management IC designed for fan and thermal control systems. It is a versatile thermal management device that provides cost savings, increased system integration and improved performance. It is designed to be used in systems requiring fan control and temperature monitoring for both environmental and device level control.

The W83791G provides fan speed control in addition to temperature monitoring and provides the system designer with a single device that can control multiple fans with varying RPM ranges and profiles. It has temperature monitoring capabilities for up to four temperature regions, each with its own associated fan control critical setpoints and effective hysteresis. The W83791G can be used in either forced-air cooling systems or as a variable-speed fan in liquid cooling applications.

The W83791G utilizes a variety of inputs, including thermistors and temperature diode sensors, to accurately monitor temperatures across its four temperature regions. The W83791G can be configured to control the fans based on temperatures of various critical components, allowing the system to react automatically to changes in temperature. This allows the designer to gain improved thermal control, reduce power consumption and system noise, and improve overall system performance.

The W83791G also provides thermal margin monitoring for every temperature region by providing for two additional temperature points for upper and lower temperature limits. This provides improved system reliability as the W83791G can detect thermal imbalance and shut down the system in order to protect the system components.

The W83791G provides system designers with an array of digital and analog interfaces to enable connection with external devices. It has two analog temperature inputs, a digital I2C interface, two Pulse Width Modulation (PWM) outputs and six fan control pins. Its PWM outputs are highly programmable and can be used to control fan speed without the need of any additional fan controller. This helps minimize design time and cost, while also allowing fan speed to be changed during operation to respond to changes in system or environmental conditions.

The W83791G also features a low-power sleep-mode, allowing the unit to go into a sleep state to conserve power when temperatures remain within acceptable operating levels. Additionally, the W83791G provides the flexibility to independently adjust fan speed without making changes to the entire system configuration. This allows the system to be easily modified, with no hardware changes required, to meet changing environmental conditions.

The W83791G is an ideal solution for system designers looking for a single device to handle thermal management and fan control requirements. Its combination of versatility, high-performance, and cost-savings makes the W83791G an attractive thermal management solution for many types of applications.

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