TPS23861 Quad IEEE 802.3at Power over Ethernet PSE controller

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.

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

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Parametrics

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Part number	Order	Vin (Min) (V)	Vin (Max) (V)	ILIM	PoE standards supported	FET	MPS method	Pair control	Operating temperature range (C)	Features	Number of PSE ports	Package Group	Package size: mm2:W x L (PKG)
TPS23861	Order now	44	57	Programmable	802.3at Type 1 (802.3af) 802.3at Type 2	External	DC Disconnect	2-Pair Alt A	-40 to 125	Autonomous Mode Current Limit with Foldback Fast shutdown Over Current Reporting Over Temp Reporting Programmable ICUT	4	TSSOP \| 28	28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP \| 28)
TPS2388	Order now	44	57	Programmable	802.3at Type 1 (802.3af) 802.3at Type 2	External	DC Disconnect	2-Pair Alt A	-40 to 125	Current Limit with Foldback Fast shutdown Multi Level Port Priority Over Current Reporting Over Temp Reporting Port remapping Programmable ICUT	8	QFN \| 56	56QFN: 64 mm2: 8 x 8 (QFN \| 56)
TPS23880	Order now	44	57	Programmable	802.3at Type 1 (802.3af) 802.3at Type 2 802.3bt Type 3 802.3bt Type 4	External	DC Disconnect	2-Pair Alt A 4-Pair	-40 to 125	Auto Mode Current Limit with Foldback Fast shutdown Multi Level Port Priority Over Current Reporting Over Temp Reporting Port remapping Programmable PCUT Programmable Port Power Limiting SRAM Programmable	8	QFN \| 56	56QFN: 64 mm2: 8 x 8 (QFN \| 56)
TPS23881	Order now	44	57	Programmable	802.3at Type 1 (802.3af) 802.3at Type 2 802.3bt Type 3 802.3bt Type 4	External	DC Disconnect	2-Pair Alt A 4-Pair	-40 to 125	Auto Mode Autonomous Mode Current Limit with Foldback Fast shutdown Multi Level Port Priority Over Current Reporting Over Temp Reporting Port remapping Programmable PCUT Programmable Port Power Limiting SRAM Programmable	8	QFN \| 56	56QFN: 64 mm2: 8 x 8 (QFN \| 56)

TPS23861 ACTIVE This product has been released to the market and is available for purchase. For some products, newer alternatives may be available. Quad IEEE 802.3at Power over Ethernet PSE controller

Description

Features

Parametrics

TPS23861
ACTIVE

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Quad IEEE 802.3at Power over Ethernet PSE controller