Overview
The ADT7473/ADT7473-1 controller, produced by onsemi, is a sophisticated thermal monitor and multiple PWM fan controller designed for applications requiring active system cooling, particularly in noise-sensitive or power-sensitive environments. This controller can drive fans using either low or high frequency drive signals and monitor the temperature of up to two remote sensor diodes along with its own internal temperature. It also measures and controls the speed of up to four fans to minimize acoustic noise and optimize system acoustics.
Key Specifications
| Parameter | Unit | Max | Typ | Min | Conditions |
|---|---|---|---|---|---|
| Input High Voltage (VIH) | V | 2.0 | 0.8 | Digital Input Logic Levels (TACH Inputs) | |
| Input Low Voltage (VIL) | V | 0.3 | 0.8 | Digital Input Logic Levels (TACH Inputs) | |
| Output Low Voltage (VOL) | V | 0.4 | IOUT = -8.0 mA | ||
| High Level Output Current (IOH) | mA | 20 | VOUT = VCC - 0.1 | ||
| Temperature Range | °C | 125 | -40 | Operating Temperature Range | |
| Temperature Accuracy | % | ±2.5 | |||
| Clock Frequency (fSCLK) | kHz | 400 | 10 | Serial Bus Timing |
Key Features
- Supports both internal and external temperature sensing with a wide temperature range from -40°C to 125°C.
- High temperature accuracy of ±2.5%.
- Drives fans using either low or high frequency drive signals.
- Monitors and controls the speed of up to four fans to minimize acoustic noise.
- Includes features like automatic fan speed control, dynamic TMIN control, and enhanced acoustic mode to reduce user perception of changing fan speeds.
- Thermal protection via THERM output and thermal control circuit via THERM input.
- Series resistance cancellation on the remote channel.
- 3-wire and 4-wire fan speed measurement.
Applications
- Notebook and Desktop Computers.
- Servers.
- Game Consoles.
- RFID Readers).
Q & A
- What is the primary function of the ADT7473/ADT7473-1 controller?
The primary function is to monitor temperature and control fan speeds in noise-sensitive or power-sensitive applications).
- How many fans can the ADT7473/ADT7473-1 controller monitor and control?
It can monitor and control up to four fans).
- What is the temperature range supported by the ADT7473/ADT7473-1?
The temperature range is from -40°C to 125°C).
- What is the temperature accuracy of the ADT7473/ADT7473-1?
The temperature accuracy is ±2.5%).
- Does the ADT7473/ADT7473-1 support both internal and external temperature sensing?
- What types of fan drive signals does the ADT7473/ADT7473-1 support?
- What is the purpose of the dynamic TMIN control mode?
The dynamic TMIN control mode optimizes system acoustics intelligently).
- Does the ADT7473/ADT7473-1 have thermal protection features?
- What types of fan speed measurement does the ADT7473/ADT7473-1 support?
- What are some common applications of the ADT7473/ADT7473-1?
