Overview
The AMC6821SDBQRG4, produced by Texas Instruments, is an intelligent temperature monitor and PWM (Pulse-Width Modulation) fan controller. This device is designed for applications requiring precise temperature monitoring and active system cooling, particularly in noise-sensitive or power-sensitive environments. It features both local and remote temperature sensing capabilities, with an accuracy of ±2°C and a resolution of 0.125°C. The AMC6821SDBQRG4 can simultaneously drive a fan, monitor remote sensor diode temperatures, and measure and control the fan speed to minimize acoustic noise while maintaining optimal performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage (VDD) | 2.7 | - | 5.5 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| Junction Temperature (TJ Max) | - | - | 150 | °C |
| Local Temperature Sensor Accuracy | ±0.5 | ±2.0 | - | °C |
| Remote Temperature Sensor Accuracy | ±1.0 | ±3.0 | - | °C |
| Temperature Resolution | - | - | 0.125 | °C |
| PWM Frequency Range | 10 Hz | - | 40 kHz | - |
| PWM Duty Cycle Range | 0% | - | 100% | - |
| PWM Duty Cycle Resolution | - | - | 8-bit (0.39%/bit) | - |
| Package Type | - | - | QSOP-16 (4mm × 5mm) | - |
Key Features
- Remote and Local Temperature Sensing: The AMC6821SDBQRG4 can monitor both remote and local temperatures with high accuracy and resolution.
- PWM Fan Controller: It features a PWM controller with a programmable frequency range of 10 Hz to 40 kHz and a duty cycle range of 0% to 100%.
- Automatic Fan Speed Control: The device supports three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode, allowing for intelligent and flexible fan speed control.
- SMBus Interface: Communication is facilitated through the SMBus interface, allowing for easy integration with system management buses.
- Alarm and Fault Detection: The device includes programmable alarm thresholds, a dedicated FAN-FAULT output, and an SMBALERT output to indicate error conditions.
- Low Power Consumption: Operating with a power supply range of 2.7V to 5.5V and low power dissipation, making it suitable for power-sensitive applications.
Applications
- Notebook and Desktop PCs: Ideal for temperature monitoring and fan control in personal computers.
- Network Servers: Used in server environments to ensure optimal cooling and temperature management.
- Telecommunications Equipment: Suitable for telecommunications devices that require precise temperature control.
- PC-Based Equipment: Applicable in various PC-based systems that need active cooling solutions.
- DLP™ and LCD Projectors: Used in display technologies to manage temperature and fan speed efficiently.
Q & A
- What is the primary function of the AMC6821SDBQRG4?
The primary function is to serve as an intelligent temperature monitor and PWM fan controller.
- What is the accuracy of the temperature sensor in the AMC6821SDBQRG4?
The local temperature sensor accuracy is ±2°C, and the remote temperature sensor accuracy is ±3°C over the specified temperature range.
- What are the different fan control modes available in the AMC6821SDBQRG4?
The device supports Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode.
- What is the PWM frequency range of the AMC6821SDBQRG4?
The PWM frequency range is programmable from 10 Hz to 40 kHz.
- How does the AMC6821SDBQRG4 communicate with other devices?
It communicates through the SMBus interface.
- What are the alarm and fault detection features of the AMC6821SDBQRG4?
The device includes programmable alarm thresholds, a dedicated FAN-FAULT output, and an SMBALERT output to indicate error conditions.
- What is the operating voltage range of the AMC6821SDBQRG4?
The operating voltage range is from 2.7V to 5.5V.
- What is the package type of the AMC6821SDBQRG4?
The device is available in a QSOP-16 package.
- What are some common applications of the AMC6821SDBQRG4?
It is used in notebook and desktop PCs, network servers, telecommunications equipment, PC-based equipment, and DLP™ and LCD projectors.
- How does the AMC6821SDBQRG4 handle fan failure detection?
The device includes a dedicated FAN-FAULT output that goes low when a fan failure is detected.
