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The TPS23861 is an easy-to-use flexible IEEE802.3at PSE solution. The device automatically manages four 802.3at ports from the factory without any external control.

The TPS23861 automatically detects Power Delivery Devices (PDs) with valid signatures, determines power requirements based on classification, and applies power. Two-event classification for Type 2 PD is supported. The TPS23861 supports DC disconnect and external field effect transistor (FET) architectures, allowing designers to balance size, efficiency and solution cost needs.

Unique pin assignments enable 2-layer PCB designs with logical grouping and clear upper and lower separation of I2C and power pins. This provides best-in-class thermal performance, Kelvin precision, and low build costs.

In addition to the automatic operation mode, the TPS23861 also implements a semi-automatic mode with I2C control for precise monitoring and intelligent power management. The 400ms TPON specification value is guaranteed in both semi-automatic mode and automatic mode.

characteristic

IEEE 802.3at Quad Port Power Sourcing Equipment (PSE) Controller

Automatic detection and classification

Automatic on and off

High Efficiency 255mΩ Sense Resistor

Pinout enables two-layer printed circuit board (PCB)

Kelvin Current Sensing

4 point detection

Auto Mode - Factory Setting

No external pin settings required

No initial I2C communication required

Semi-Auto Mode - Set by I2C Command

Continuous identification and classification

Compliant with IEEE 400ms TPON specification

Fast Port Shutdown Input

Best performance when used with system reference code http://www.ti.com.cn/product/cn/TPS23861/toolssoftware

Optional I2C control and monitoring

-40°C to 125°C temperature range

9.8mm x 6.6mm TSSOP 28 package