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See Technical Specifications

TPS23861PWR

2-pair, type-2, 4-channel PoE PSE with autonomous mode

Manufacturer:

TI
Mfr.Part #:

TPS23861PWR
Datasheet:

TPS23861PWR Datasheet (PDF)
Vin (min) (V):

44
Vin (max) (V):

57
ILIM:

Programmable
PoE standards supported:

802.3at Type 1 (802.3af), 802.3at Type 2
EDA/CAD Models:

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TPS23861PWR General Description

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, it automatically manages four 802.3at ports without the need for any external control.

The TPS23861 automatically detects Powered Devices (PDs) that have a valid signature, determines power requirements according to classification and applies power. Two-event classification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the external FET architecture allows designers to balance size, efficiency and solution cost requirements.

The unique pin-out enables 2-layer PCB designs via logical grouping and clear upper and lower differentiation of I²C and power pins. This delivers best-in-class thermal performance, Kelvin accuracy and low-build cost.

In addition to automatic operation, the TPS23861 supports Semi-Auto Mode via I²C control for precision monitoring and intelligent power management. Compliance with the 400-ms T_PON specification is ensured whether in semi-automatic or automatic mode.

Key Features

IEEE 802.3at Quad Port PSE controller
- Auto Detect, classification
- Auto Turn-On and disconnect
- Efficient 255-mΩ sense resistor
Pin-Out enables Two-Layer PCB
Kelvin Current Sensing
4-Point detection
Automatic mode – as shipped
- No External terminal setting required
- No Initial I²C communication required
Semi-Automatic mode – set by I²C command
- Continuous Identification and Classification
- Meets IEEE 400-ms T_PON specification
- Fast-Port shutdown input
- Operates best when used in conjunction with system reference code http://www.ti.com/product/TPS23861/toolssoftware
Optional I²C control and monitoring
–40°C to 125°C Temperature range
TSSOP 28 Package 9.8 mm x 6.6 mm

Specifications

Vin (min) (V)	44	Vin (max) (V)	57
ILIM	Programmable	PoE standards supported	802.3at Type 1 (802.3af), 802.3at Type 2
FET	External	MPS method	DC Disconnect
Pair control	2-Pair Alt A	Operating temperature range (°C)	-40 to 125
Features	Autonomous Mode, Current Limit with Foldback, Fast shutdown, Over Current Reporting, Over Temp Reporting, Programmable ICUT	Number of PSE ports	4
Rating	Catalog