The ADT7466 dBCool controller is a complete thermal monitor and dual fan controller for low acoustic noise notebook PCs. It features the ability to monitor two analog voltages or thermistor temperature inputs, control and monitor the speed of up to two fans, automatic fan speed control mode based on measured temperature, enhanced acoustic mode to reduce user perception of changing fan speeds, thermal protection feature via THERM output to monitor the performance impact of Intel® Pentium® 4 processor thermal control circuit, and 3-wire fan speed measurement with limit comparison of all monitored values via SMBus 1.1 serial interface.
The ADT7466 is a complete thermal monitor and dual fan controller designed for noise-sensitive applications requiring active system cooling. It monitors two analog voltages or thermistor temperatures, plus its own supply voltage, and can control up to two fans based on measured temperature.
The device features an SMBus 1.1 serial interface and includes automatic fan speed control modes to optimize cooling while minimizing acoustic noise. It supports series resistance cancellation for remote sensors and provides thermal protection via the THERM output.
| Supply Voltage | 3.0 to 5.5 V |
|---|---|
| Local Sensor Accuracy | +1 °C (20°C < Ta < 60°C) |
| Resolution | 0.25 °C |
| Fan RPM Accuracy | +4 % |
| Full-Scale Count | 65,535 |
The absolute maximum rating for the positive supply voltage is 6.5 V.