The ADT7475 dBCool controller is a thermal monitor and multiple PWM fan controller for noise-sensitive applications. It can monitor up to 4 fans, control and monitor temperature, and has thermal protection features.
The ADT7475 dBCool controller is a thermal monitor and PWM fan controller designed for noise‑sensitive or power‑sensitive applications. It can drive up to four fans, measure internal and up to two remote temperature sensors, and includes automatic fan speed control, acoustic mode, and thermal protection via the THERM pin.
The manual details functional block diagrams, pin configurations, absolute maximum ratings, timing specifications, and programming steps for the automatic fan speed control loop. It also includes full electrical specifications, performance characteristics, and recommended implementation guidelines.
| Supply Voltage (operating) | 3.0 V (min) – 3.3 V (typ) – 3.6 V (max) |
|---|---|
| Supply Current (ADC active) | 15 mA |
| Local Sensor Accuracy | ±0.5 °C at 25 °C |
| Resolution (temperature) | 0.25 °C |
| Conversion Time (Voltage Input) | 11 ms (averaging enabled) |
| Input High Voltage (digital inputs) | 20 V |
| Maximum Junction Temperature | 150 °C |
The ADT7475 can control and monitor up to four fans.
The device can measure temperatures up to 191 °C.
The ADT7475 operates from 3.0 V to 3.6 V supply voltage.