TPS2375DG4

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Controller (PD)
Number of Channels:	1
Power - Max:	12.95W
Internal Switch(s):	Yes
Auxiliary Sense:	No
Standards:	802.3af (PoE)
Voltage - Supply:	0 V ~ 57 V
Current - Supply:	240µA
Operating Temperature:	-40°C ~ 85°C
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	TPS2375

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Introduction to TPS2375DG4

The TI TPS2375DG4 is a highly integrated Power-over-Ethernet (PoE) controller, providing an industry-leading system solution for Power-over-Ethernet applications. This device is intended to reduce cost, size and complexity while meeting the requirements of the IEEE 802.3af standard.

Application field and working principle of TPS2375DG4

Power-over-Ethernet (PoE) is an emerging technology that allows network device manufacturers to cost-effectively power products over a single Ethernet cable. TPS2375DG4 enables the provision of up to 15W of power over twisted-pair Ethernet cables, making it the ideal choice for a wide variety of Ethernet powered applications, such as IP phones, Wi-Fi access points, or LED lighting. It is capable of performing multiple functions such as regulating, detecting, controlling, and signaling for the Power Sourcing Equipment (PSE). The TPS2375DG4 is specifically designed for IEEE 802.3af powered devices (PDs) and can support up to 15W delivery. It consists of two independent ports, each with its own independent power supply. These power supplies are designed to meet the requirements of the IEEE 802.3af standard and are capable of delivering up to 15W of power.The power supply circuit uses two sets of MOSFETs and switches to regulate input and output voltages. The input voltage is first monitored and regulated by the PSE circuit. The regulated input voltage is then controlled by the detection and control circuit. The detection and control circuit monitors the two ports, senses and identifies the type of connection (e.g. DP/DM), and detects if someone is trying to draw more than 15W of power.The voltage and current regulation is achieved by the current- and voltage-based MOSFET switching, depending on the type of connection. When the voltage drops, a controller sends a signal to the control and detection circuit, which then activates the voltage MOSFET and brings the voltage back up to the desired level. Similarly, a current monitor senses the current output from each port, and the current MOSFET is activated when the current exceeds the set threshold. When the voltage and current are within the assigned thresholds, the device is considered to be in a stable state. The TPS2375DG4 provides protection against overvoltage and overcurrent conditions, operating temperature and voltage detection, and external temperature sensing. An onboard 12V linear regulator is provided for adapter and modular power applications.

Conclusion

The TPS2375DG4 is an integrated Power-over-Ethernet (PoE) controller that enables the delivery of up to 15W of power to PoE-powered devices. It is designed specifically to meet the requirements of the IEEE 802.3af standard and provides overvoltage and overcurrent protection, operating temperature and voltage detection, and external temperature sensing. The device is suitable for applications such as IP phones, Wi-Fi access points, or LED lighting, and is capable of regulating, detecting, controlling, and signaling for the Power Sourcing Equipment (PSE).

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