MAX16135HRB/V+

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PMIC Supervisors are a type of integrated circuit designed specifically for use in power management applications. The MAX16135HRB/V+ is one such supervisor. In this article, we will discuss the application field and working principle of this supervisor.

Application Field

The MAX16135HRB/V+ provides superior protection for AC/DC applications and is ideal for protecting systems from overvoltage/undervoltage and overcurrent. This supervisor is also specifically suited for monitoring and limiting inrush currents on Startup, making it suitable for use in a variety of applications, including:

• Uninterruptible Power Systems (UPS)
• Telecom Systems
• Computer Power Supplies
• Industrial Automation and Control systems
• White Goods (Refrigerators, Washers and Dryers)
• Automotive, Motorcycles and Boats

The typical operation voltage range for this supervisor is between 8 and 18V, with a wide operating voltage range of 4.5 to 20V. The supervisor offers 1,2 and 3 overvoltage detection pins, each with its own adjustable trip-point comparator and hysteresis. It additionally features an adjustable overcurrent detection pin, making it suitable for a wide range of applications.

Working Principle

The MAX16135HRB/V+ has two main functional parts: the Controller and the OV/OC Sense circuitry. The Controller is a microprogrammed state machine that controls the activities of the OV/OC Sense circuitry.

When power is applied, the controller checks the status of the sense pins, if the pin voltage is over the specific set point, the controller will activate one of its outputs (signal) if this is the case. The signal is routed through the output driver to the active low RESET OUT pin.

The RESET OUT pin is the primary output signal used to inform the system that a fault has occurred, and the supervisor\'s OV/OC Sense circuit has detected it. The supervisor\'s OV/OC Sense circuit will then remain in this condition until the fault is cleared and the supervisor is reset.

The MAX16135HRB/V+ additionally features Cross Point Current limitation, which enables the board to act as a voltage regulator if the input voltage is above the set point level. When the input voltage exceeds the set point, the current draw at the input will be limited by the supervisor. This ensures the board’s protection from over- current and voltage conditions, allowing for improved device lifetime and performance.

Conclusion

The MAX16135HRB/V+ is a highly versatile PMIC supervisor designed for a variety of applications, including UPS, telecom systems, industrial automation and control systems, white goods and automotive applications. It features wide operating voltage range, 1,2 and 3 overvoltage detection pins, an adjustable overcurrent detection pin, and Cross Point Current limiting.

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