MAX5952AUAX+T

Power Management Integrated Circuits (PMIC) systems are designed to provide a higher level of integration and reduce power consumption. Among all the available PMICs, Power over Ethernet (PoE) Controllers are a specialized type of PMICs, providing solutions to manage power and control current levels in various applications. MAX5952AUAX+T is a high-performance PoE controller, which offers a robust and efficient design for power applications. This article presents an overview of the application fields and working principle of MAX5952AUAX+T.

Application fields

MAX5952AUAX+T is an adjustable PoE controller with programmable voltage, current limit and charging current. This makes it ideal for a wide range of PoE applications, including networking and telecommunication devices, IP cameras, door access control systems, medical equipment and other IoT devices. With features such as over-voltage protection, short-circuit protection and brown-in protection, it provides reliable, safe and efficient power delivery for such devices. It also supports class 0 (1-4 W), class 3 (12.95 W), class 4 (25.5 W) and class 6 (51 W) power levels.

The chip is capable of providing up to 600 mA of current output with a voltage range of 0.65V to 50V. Its wide-input range makes MAX5952AUAX+T suitable for use in power applications where input power may vary. Additionally, the wide operating temperature range of -40°C to +85°C provides robust operation in harsh environments.

Working principle

The MAX5952AUAX+T PoE controller is based on a current-mode, single-stage regulated topology. The chip is driven by a single inductor and external MOSFET, and uses feed forward and compensation to deliver a stable output voltage. The output current is measured and regulated by an internal output current feedback loop. Furthermore, the chip integrates a programmable over-voltage protection (OVP) to protect the output voltage from exceeding the safe operating value. It also provides a fast dynamic response to a sudden load changes while maintaining a high power efficiency.

The chip also contains an integrated voltage feedback loop, allowing it to be used as a wide-range constant current source. This makes it ideal for powering LED strips, as well as providing a steady current for LED displays and indicator lights. Additionally, the chip features low-ripple modes, which ensure a low-noise operation for precision control.

In summary, MAX5952AUAX+T is an advanced PoE controller with features such as over-voltage protection, short-circuit protection and brown-in protection, making it suitable for power applications in various fields. Its wide-input range and ability to deliver up to 600 mA of current make it an ideal companion for powering various IoT devices, while its integrated voltage feedback loop makes it suitable for powering LED displays and indicator lights.