Overview
The MAX31790ATI+ is a 6-Channel PWM-Output Fan RPM Controller produced by Analog Devices Inc./Maxim Integrated. This component is designed to control the speeds of up to six fans using six independent PWM outputs. The desired fan speeds or PWM duty cycles are set through an I2C interface, making it highly versatile for various cooling applications. The MAX31790ATI+ is particularly useful in systems requiring precise fan control and monitoring, such as servers, networking equipment, and telecommunications devices.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| PWM Resolution | 9 | Bits |
| PWM Frequency Accuracy | -6 to +6 | % |
| TACH Count Resolution | 11 | Bits |
| TACH Count Oscillator Frequency | 32.768 kHz | |
| TACH Count Oscillator Accuracy | -0.5 to +0.5% (at 25°C, 3.3V) | |
| Supply Voltage Range | 3.0V to 5.5V | |
| Operating Temperature Range | -40°C to +125°C | |
| Package Type | 28-pin TQFN |
Key Features
- Controls up to six independent fans with PWM drive.
- Up to 12 tachometer inputs for precise fan RPM monitoring and failure detection.
- Controlled duty cycle rate-of-change for optimal acoustic performance.
- Versatile startup configurations ensure reliable fan control at power-up without waiting for system microcontroller direction.
- I2C bus interface with timeout and watchdog features.
- Low acoustic impact due to programmable rate of change in PWM duty cycle.
Applications
The MAX31790ATI+ is ideal for a wide range of cooling applications, including:
- Servers
- Networking equipment
- Telecommunications devices
Q & A
- What is the primary function of the MAX31790ATI+?
The MAX31790ATI+ is a 6-Channel PWM-Output Fan RPM Controller designed to control the speeds of up to six fans using PWM outputs. - How are the fan speeds set?
The desired fan speeds or PWM duty cycles are set through an I2C interface. - What is the resolution of the PWM outputs?
The PWM resolution is 9 bits. - What is the operating temperature range of the MAX31790ATI+?
The operating temperature range is -40°C to +125°C. - What package type is the MAX31790ATI+ available in?
The MAX31790ATI+ is available in a 28-pin TQFN package. - What is the supply voltage range for the MAX31790ATI+?
The supply voltage range is 3.0V to 5.5V. - How many tachometer inputs does the MAX31790ATI+ support?
The MAX31790ATI+ supports up to 12 tachometer inputs. - What interface does the MAX31790ATI+ use for communication?
The MAX31790ATI+ uses an I2C bus interface. - What features does the MAX31790ATI+ have to ensure low acoustic impact?
The MAX31790ATI+ has a controlled duty cycle rate-of-change to minimize acoustic impact. - In what types of applications is the MAX31790ATI+ commonly used?
The MAX31790ATI+ is commonly used in servers, networking equipment, and telecommunications devices.
