Overview
The ADT7476AARQZ-R/BKN, produced by onsemi, is a sophisticated thermal controller and voltage monitor designed for noise-sensitive or power-sensitive applications that require active system cooling. This integrated circuit combines the functions of a thermal monitor and a multiple PWM fan controller, making it an essential component for maintaining optimal system temperatures and minimizing acoustic noise.
Key Specifications
| Parameter | Unit | Typical | Maximum | Minimum |
|---|---|---|---|---|
| Voltage Supply (VCC) | V | 3.3 | 3.6 | 3.0 |
| Current Consumption (IDD) | mA | 1.00 | 1.20 | 0.98 |
| Temperature Error (Local) | °C | - | ±2.5 | - |
| Temperature Error (Remote) | °C | - | ±2.5 | - |
| Conversion Time | ms | 11 | - | - |
| Total Monitoring Cycle Time (Averaging Enabled) | ms | 145 | - | - |
| Input Resistance (VCCP Channel) | kΩ | 70 | - | - |
| Input Resistance (All Other Channels) | kΩ | 200 | - | - |
Key Features
- Monitors up to five voltages and the temperature of up to two remote sensor diodes plus its own internal temperature.
- Controls the speed of up to four fans using PWM signals, optimizing fan speed for minimum acoustic noise.
- Provides automatic fan speed control loop to adjust fan speed based on temperature.
- Offers critical thermal protection using the bidirectional THERM pin to prevent system or component overheating.
- Supports both low and high frequency drive signals for fan control.
- Includes performance monitoring and input signal conditioning capabilities.
Applications
The ADT7476AARQZ-R/BKN is suitable for various applications requiring precise thermal management and noise reduction, such as:
- Noise-sensitive electronic systems.
- Power-sensitive applications.
- Server and data center cooling systems.
- High-performance computing systems.
- Aerospace and industrial control systems.
Q & A
- What is the primary function of the ADT7476AARQZ-R/BKN?
The primary function is to monitor and control temperatures and fan speeds in electronic systems, ensuring optimal cooling and minimal noise.
- How many voltages can the ADT7476AARQZ-R/BKN monitor?
It can monitor up to five voltages.
- What types of temperature sensors does it support?
It supports up to two remote sensor diodes and its own internal temperature sensor.
- How many fans can it control?
It can control the speed of up to four fans.
- What is the purpose of the THERM pin?
The THERM pin provides critical thermal protection by preventing system or component overheating and can also be used to monitor the effectiveness of the thermal solution.
- What are the typical operating voltage and current for the ADT7476AARQZ-R/BKN?
The typical operating voltage is 3.3V, and the typical current consumption is 1.00 mA.
- What is the conversion time for the ADT7476AARQZ-R/BKN?
The conversion time is typically 11 ms.
- What is the total monitoring cycle time when averaging is enabled?
The total monitoring cycle time is typically 145 ms when averaging is enabled.
- What are some common applications for the ADT7476AARQZ-R/BKN?
Common applications include noise-sensitive electronic systems, power-sensitive applications, server and data center cooling systems, high-performance computing systems, and aerospace and industrial control systems.
- Does the ADT7476AARQZ-R/BKN support both low and high frequency fan control?
Yes, it supports both low and high frequency drive signals for fan control.
