Overview
The AMC6821SDBQR, produced by Texas Instruments, is an intelligent temperature monitor and pulse-width modulation (PWM) fan controller. It is designed for noise-sensitive or power-sensitive applications that require active system cooling. This device can simultaneously drive a fan, monitor remote sensor diode temperatures, and measure and control the fan speed to operate with minimal acoustic noise at the lowest possible speed.
The AMC6821 features three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode, allowing for flexible and efficient fan speed management. It also includes programmable SMBALERT and FAN-FAULT outputs to indicate error conditions and fan failure, respectively.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | QSOP-16 (DBQ) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 125 | °C |
| PWM Frequency Range | 10 Hz to 40 kHz | - |
| Duty Cycle Range | 0% to 100% | - |
| Duty Cycle Resolution | 8-bit (0.39%/bit) | - |
| Power Supply Voltage | 2.7V to 5.5V | V |
| Remote Temperature Sensor Accuracy | ±2°C (0°C to 100°C), ±3°C (-40°C to 125°C) | °C |
| Local Temperature Sensor Accuracy | ±2°C (0°C to 100°C), ±3°C (-25°C to 100°C) | °C |
| Temperature Sensor Resolution | 0.125°C | °C |
Key Features
- Remote and Local Temperature Sensors: ±2°C accuracy, 0.125°C resolution for both remote and local temperature sensing.
- PWM Controller: PWM frequency range of 10 Hz to 40 kHz, duty cycle range of 0% to 100% with 8-bit resolution.
- Automatic Fan Speed Control Loops: Three fan control modes - Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode.
- SMBus Interface: Communicates through the serial system management bus (SMBus) as a slave device.
- Programmable SMBALERT and FAN-FAULT Outputs: For indicating error conditions and fan failure.
- Fail-Safe Output for Over-Temperature Conditions: The THERM pin can be used to throttle a CPU clock.
- RoHS Compliant: Available in a QSOP-16 (4mm × 5mm) green package.
Applications
- Notebook and Desktop PCs
- Network Servers
- Telecommunications Equipment
- PC-Based Equipment
- DLP and LCD Projectors
Q & A
- What is the primary function of the AMC6821SDBQR?
The AMC6821SDBQR is an intelligent temperature monitor and pulse-width modulation (PWM) fan controller designed for noise-sensitive or power-sensitive applications.
- What are the different fan control modes available in the AMC6821SDBQR?
The device features three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode.
- What is the operating temperature range of the AMC6821SDBQR?
The operating temperature range is -40°C to 125°C.
- What is the PWM frequency range of the AMC6821SDBQR?
The PWM frequency range is 10 Hz to 40 kHz.
- How accurate are the temperature sensors in the AMC6821SDBQR?
The remote and local temperature sensors have an accuracy of ±2°C (0°C to 100°C) and ±3°C (-40°C to 125°C or -25°C to 100°C respectively).
- What is the resolution of the temperature sensors?
The temperature sensors have a resolution of 0.125°C.
- What interface does the AMC6821SDBQR use for communication?
The device communicates through the serial system management bus (SMBus) as a slave device.
- What are the programmable outputs available in the AMC6821SDBQR?
The device includes programmable SMBALERT and FAN-FAULT outputs.
- Is the AMC6821SDBQR RoHS compliant?
- What are some common applications of the AMC6821SDBQR?
