LT4294 Series

IEEE 802.3bt PD Interface Controller

Catalog

IEEE 802.3bt PD Interface Controller

Part	Power - Max [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [x]	Package / Case [x]	Standards	Number of Channels	Current - Supply	Supplier Device Package	Mounting Type	Voltage - Supply [Max]
Analog Devices LT4294IMS#PBF	71 W	85 °C	-40 °C	10-MSOP 10-TFSOP	3 mm	0.118 in	802.3af (PoE) 802.3at (PoE+) 802.3bt	1	2 mA	10-MSOP	Surface Mount	60 V
Analog Devices LT4294IDD#PBF	71 W	85 °C	-40 °C	10-WFDFN Exposed Pad			802.3af (PoE) 802.3at (PoE+) 802.3bt	1	2 mA	10-DFN (3x3)	Surface Mount	60 V
Analog Devices LT4294HDD#TRPBF	71 W	125 °C	-40 °C	10-WFDFN Exposed Pad			802.3af (PoE) 802.3at (PoE+) 802.3bt	1	2 mA	10-DFN (3x3)	Surface Mount	60 V
Analog Devices LT4294HMS#PBF	71 W	125 °C	-40 °C	10-MSOP 10-TFSOP	3 mm	0.118 in	802.3af (PoE) 802.3at (PoE+) 802.3bt	1	2 mA	10-MSOP	Surface Mount	60 V

Catalog

IEEE 802.3bt PD Interface Controller

Key Features

• IEEE 802.3af/at/bt Powered Device (PD) Controller

• Supports Up to 71.3W PDs

• 5-Event Classification Sensing

• Superior Surge Protection (100V Absolute Maximum)

• Wide Junction Temperature Range (–40°C to 125°C)

• Overtemperature Protection

• Integrated Signature Resistor

• External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency

• Configurable Aux Power Support as Low as 9V

• Easy Migration Between LTPoE++®PDs and IEEE 802.3bt PDs

• Pin Compatible with LT4275A/B/C

• Available in 10-Lead MSOP and 3mm × 3mm DFN Packages

Description

The LT4294 is an IEEE 802.3af/at/bt-compliant powered device (PD) interface controller. TheT2Poutput indicates the number of classification events received during IEEE 802.3bt-compliant mutual identification and negotiation of available power.The LT4294 utilizes an external, low RDS(ON)N-channel hot swap MOSFET and supports the LT4320/LT4321 ideal diode bridges, to extend the end-to-end power delivery efficiency and eliminate costly heat sinks. The LT4294 also includes a power good output, onboard signature resistor, undervoltage lockout, and thermal protection. Start-up inrush current is adjustable with an external capacitor. Auxiliary power override is supported as low as 9V with the AUX pin.The LT4294 can be configured to support all possible 802.3bt, 802.3at and 802.3af power levels with external component changes. Pin-for-pin compatibility with the LT4275 family of PD Interface Controllers enables easy migration between LTPoE++ PDs and IEEE 802.3bt-compliant PDs.ApplicationsHigh Power Wireless Data SystemsOutdoor Security Camera EquipmentCommercial and Public Information DisplaysHigh Temperature Industrial Applications