MAX6641AUB90+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Temperature Sensor and Fan Controller

Characteristics: - Monitors temperature and controls fan speed - Operates in a wide temperature range - Small form factor - Low power consumption

Package: 10-pin µMAX® package

Essence: The MAX6641AUB90+ is an integrated circuit that combines a temperature sensor and a fan controller. It is designed to monitor temperature and control the speed of a cooling fan based on the measured temperature.

Packaging/Quantity: The MAX6641AUB90+ is available in a 10-pin µMAX® package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Temperature Range: -40°C to +125°C
• Supply Voltage: 2.7V to 5.5V
• Temperature Accuracy: ±3°C
• Fan Speed Control: PWM (Pulse Width Modulation)
• Output Drive Capability: Up to 25mA
• Shutdown Current: 0.1µA (typical)

Pin Configuration

The MAX6641AUB90+ has a total of 10 pins, which are assigned specific functions:

1. VDD: Power supply voltage input
2. GND: Ground reference
3. ALERT: Open-drain output for temperature alert indication
4. TACH: Tachometer output for fan speed monitoring
5. FAN: PWM output for fan speed control
6. SDA: Serial data input/output for I2C communication
7. SCL: Serial clock input for I2C communication
8. VCC: Internal voltage regulator output
9. VFB: Feedback voltage input for fan speed control
10. NC: No connection (unused pin)

Functional Features

1. Temperature Monitoring: The MAX6641AUB90+ accurately measures the temperature using an integrated sensor.
2. Fan Speed Control: Based on the measured temperature, the IC adjusts the fan speed using PWM control.
3. Temperature Alert: The ALERT pin can be used to indicate when the temperature exceeds a predefined threshold.
4. Tachometer Output: The TACH pin provides a signal that can be used to monitor the fan speed.
5. I2C Communication: The SDA and SCL pins enable communication with other devices using the I2C protocol.

Advantages and Disadvantages

Advantages: - Integration of temperature sensor and fan controller in a single IC - Wide operating temperature range - Small form factor allows for space-saving designs - Low power consumption

Disadvantages: - Limited temperature accuracy compared to dedicated temperature sensors - Requires additional external components for fan control

Working Principles

The MAX6641AUB90+ operates by continuously monitoring the temperature using its integrated sensor. It compares the measured temperature with a predefined threshold and adjusts the fan speed accordingly. The fan speed control is achieved through PWM modulation of the FAN pin. The IC communicates with other devices using the I2C protocol, allowing for configuration and temperature data retrieval.

Application Field Plans

The MAX6641AUB90+ finds applications in various fields where temperature monitoring and fan control are required. Some potential application areas include:

1. Personal Computers: The IC can be used to control the cooling fans in desktop computers and laptops, ensuring optimal thermal management.
2. Home Appliances: It can be employed in refrigerators, air conditioners, and other appliances that require temperature regulation and fan control.
3. Industrial Equipment: The IC can be integrated into industrial machinery and equipment to monitor temperature and control cooling fans for efficient operation.
4. Automotive Electronics: It can be utilized in automotive applications to monitor temperature and control fans for cooling electronic components.

Alternative Models

1. MAX6642AUB90+: Similar to the MAX6641AUB90+, but with improved temperature accuracy.
2. MAX6643AUB90+: Offers additional features such as multiple temperature alert thresholds and extended temperature range.
3. MAX6644AUB90+: Provides enhanced fan speed control options and additional I/O pins for expanded functionality.

These alternative models offer different specifications and features, allowing users to choose the most suitable option based on their specific requirements.

In conclusion, the MAX6641AUB90+ is an integrated circuit that combines a temperature sensor and a fan controller. It offers accurate temperature monitoring and fan speed control, making it suitable for various applications requiring thermal management. Its small form factor and low power consumption make it an attractive choice for space-constrained designs. However, it has limitations in terms of temperature accuracy and requires additional external components for fan control.