ADM1025ARQ-REEL7

The ADM1025ARQ-REEL7 is an integrated low-voltage fan-speed controller module. It includes an integrated fan controller, PWM output, temperature input and control logic. This module has been designed to provide users with the convenience of a fan speed controller that operates at the lowest possible voltage to reduce system power consumption and maintain optimal fan performance. The ADM1025ARQ-REEL7 is often employed in computer cooling systems and other mission-critical applications in which fan speeds must be accurately controlled for optimal performance.

Inputs of the ADM1025ARQ-REEL7

The inputs of the ADM1025ARQ-REEL7 consist of two temperature sensors, an external clock, a power match control pin, and an indicate-speed control pin. The temperature sensors can be selected from either a thermistor, a thermocouple or an NTC sensor. The external clock provides a 0 to 5VDC reference voltage to the fan-speed regulator. The power match control pin determines the amount of power to be delivered to the fan. Lastly, the indicate-speed control pin allows the user to set the target fan speed.

Outputs of the ADM1025ARQ-REEL7

The outputs of the ADM1025ARQ-REEL7 consist of one fan speed control (FSC) line and one over-ride control line. The FSC line provides the fan speed adjustment comparison signal. The over-ride control line provides the user with the ability to reduce or increase fan speed in response to changing conditions such as excessive temperatures.

General Characteristics of the ADM1025ARQ-REEL7

• The operating voltage range of the module is between 2.7V and 5.5V
• The operating temperature range of the module is between 0°C and 70°C
• The power consumption of the module is approximately 400mW maximum
• The typical step resolution of the module is 1%

Application Fields and Working Principle of the ADM1025ARQ-REEL7

The ADM1025ARQ-REEL7 is an ideal solution for controlling fan speed in cooling systems, computers, general purpose electronics, and other mission-critical applications. The fan speed controller allows the user to precisely regulate the fan speed to reduce system power consumption and ensure optimal fan performance.

The ADM1025ARQ-REEL7 is a pulse-width modulation (PWM) fan-speed controller. It operates on the principle of comparing the feedback signal of the temperature sensors to a reference clock signal to adjust the fan speed accordingly. The PWM signal is then sent to the fan to indicate the desired speed. The reference voltage to the regulator is also adjustable, allowing the user to vary the fan speed in order to meet specific application requirements.

In order to maintain optimal fan performance, the ADM1025ARQ-REEL7 also incorporates a temperature-controlled over-ride feature. This feature allows the user to pre-program the maximum speed of the fan based on the temperature of its environment. This feature helps ensure that the fan does not exceed its maximum speed in response to excessive temperatures.

In summary, the ADM1025ARQ-REEL7 is a powerful and convenient fan-speed controller for mission-critical applications. It provides precise control over fan speed, and its integrated temperature-controlled over-ride feature ensures that the fan is not pushed beyond its limits.