Overview
The AMC6821-Q1, 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-Q1 is qualified for automotive applications, with a junction temperature range of –40°C to +150°C, and is functional safety-capable. It features three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode, allowing for flexible and efficient fan speed control.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SSOP (DBQ) | - |
| Pins | 16 | - |
| Operating Temperature Range | –40 to 125 | °C |
| Junction Temperature Range | –40 to +150 | °C |
| Remote Temperature Sensor Accuracy | ±3°C | - |
| Local Temperature Sensor Accuracy | ±3°C | - |
| PWM Frequency Range | 10 Hz to 40 kHz | - |
| PWM Duty Cycle Range | 0% to 100%, 8 bits | - |
| Power Supply Voltage | 2.7 V to 5.5 V | - |
| Package Size | 4mm × 5mm | - |
| RoHS Compliance | Yes | - |
Key Features
- Qualified for automotive applications with a junction temperature range of –40°C to +150°C.
- Functional Safety-Capable with documentation available to aid in functional safety system design.
- Remote and local temperature sensors with ±3°C accuracy and 0.250°C resolution.
- PWM controller with a frequency range of 10 Hz to 40 kHz and a duty cycle range of 0% to 100% (8 bits).
- Automatic fan speed control loops with three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode.
- SMBus interface for communication.
- Programmable SMBALERT output to indicate error conditions and a dedicated FAN-FAULT output to indicate fan failure.
- THERM pin for fail-safe output in over-temperature conditions to throttle a CPU clock.
- RoHS-compliant and latch-up exceeds 100 mA per JESD78B - class I.
Applications
- Advanced Driver Assistance Systems (ADAS) domain controllers.
- Drive assist Electronic Control Units (ECUs).
- Digital cockpit processing units.
- Surround view system ECUs.
- Noise-sensitive or power-sensitive applications requiring active system cooling.
Q & A
- What is the AMC6821-Q1 used for?
The AMC6821-Q1 is an intelligent temperature monitor and PWM fan controller designed for noise-sensitive or power-sensitive applications that require active system cooling.
- What are the key fan control modes of the AMC6821-Q1?
The AMC6821-Q1 features three fan control modes: Auto Temperature-Fan mode, Software-RPM mode, and Software-DCY mode.
- What is the accuracy of the remote and local temperature sensors?
The remote and local temperature sensors have an accuracy of ±3°C and a resolution of 0.250°C.
- What is the PWM frequency range of the AMC6821-Q1?
The PWM frequency range is from 10 Hz to 40 kHz.
- What communication interface does the AMC6821-Q1 use?
The AMC6821-Q1 uses an SMBus interface for communication.
- What are the power supply voltage requirements for the AMC6821-Q1?
The power supply voltage range is from 2.7 V to 5.5 V.
- Is the AMC6821-Q1 RoHS-compliant?
Yes, the AMC6821-Q1 is RoHS-compliant.
- What is the package type and size of the AMC6821-Q1?
The AMC6821-Q1 is available in a SSOP-16 package with a size of 4mm × 5mm.
- What are some of the typical applications of the AMC6821-Q1?
Typical applications include ADAS domain controllers, drive assist ECUs, digital cockpit processing units, and surround view system ECUs.
- How does the AMC6821-Q1 handle over-temperature conditions?
The AMC6821-Q1 has a THERM pin for fail-safe output in over-temperature conditions to throttle a CPU clock, and an OVR pin to indicate the over-temperature limit.
