TPS2388RTQT

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Power Over Ethernet (PoE) Controllers

Power Over Ethernet (PoE) controllers are used to accurately control and manage power distribution in PoE applications. Electronic devices, such as controllers, antennas, and switches, can make use of the signal provided to them from the controller to adjust the current based on the needs of the specific application. Out of many available power controllers, the TPS2388RTQT is one of the most powerful, efficient and cost-effective solutions.

TPS2388RTQT application field & working principle

The TPS2388RTQT is an integrated PoE power control IC designed for both IEEE 802.3 standards and emerging high power applications. It provides excellent system performance and flexibility, with features such as load current sensing, load monitoring, and load current regulation. The controller is suitable for a wide range of applications such as device power supply, smart building, access control, and industrial automation.

This device includes a 7-channel PWM controller and a high side switch which detect the voltage on the secondary winding of the transformer. The TPS2388RTQT soon switches to the secondary side control mode in order to reduce current consumption and increase the efficiency of the system. It then starts measuring the load current, while continuously changing the duty cycle of the PWM comparator to keep it stable. Furthermore, the TPS2388RTQT also implements a switch-boost converter with current limiting in order to compensate for load losses due to the impedance of the load.

This controller also uses a hysteresis compensation technique in order to avoid errors and decrease power consumption in order to increase system efficiency. The TPS2388RTQT then uses pulse frequency modulation (PFM) to reduce the switch-on losses from the converter. It utilizes a proprietary power fault detector to extend the protection of the system against short-circuits and other overloads.

The controller provides adjustable output voltages from 8V up to 55V, and overcurrent cutoff with adjustable delay. It is integrated with monitoring pins for temperature, voltage, and power, enabling for various protection applications. The TPS2388RTQT also offers excellent thermal performance, ensuring it always runs at the top of its performance without overheating.

The TPS2388RTQT offers greater efficiency and cost-effectiveness compared to other PoE controllers in its class. This power controller is reliable and provides a wide range of features and protections which make it a perfect solution for a variety of applications related to power management in PoE systems.

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