DESCRIPTION Controls and monitors up to 4 fans The ADT7467 dBCool® controller is a thermal monitor and High and low frequency fan drive signal multiple PWM fan controller for noise-sensitive or power- 1 on-chip and 2 remote temperature sensors sensitive applications requiring active system cooling. The Series resistance cancellation on the remote channel ADT7467 can drive a fan using either a low or high frequency Extended temperature measurement range, up to 191°C drive signal, monitor the temperature of up to two remote Dynamic TMIN control mode intelligently optimizes sensor diodes plus its own internal temperature, and measure system acoustics and control the speed of up to four fans so that they operate at Automatic fan speed control mode manages system cooling the lowest possible speed for minimum acoustic noise. based on measured temperature Enhanced acoustic mode dramatically reduces user The automatic fan speed control loop optimizes fan speed for a perception of changing fan speeds given tem