LT4293 Series

LTPoE++/IEEE 802.3bt PD Interface Controller

Catalog

LTPoE++/IEEE 802.3bt PD Interface Controller

Part	Package / Case	Package / Case [x]	Package / Case [x]	Supplier Device Package	Power - Max [Max]	Current - Supply	Standards	Voltage - Supply	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Number of Channels
Analog Devices LT4293IMS#PBF	10-MSOP 10-TFSOP	3 mm	0.118 in	10-MSOP	90 W	2 mA	802.3af (PoE) 802.3at (PoE+) 802.3bt LTPoE++	60 VDC	-40 °C	85 °C	Surface Mount	1
Analog Devices LT4293HMS#TRPBF	10-MSOP 10-TFSOP	3 mm	0.118 in	10-MSOP	90 W	2 mA	802.3af (PoE) 802.3at (PoE+) 802.3bt LTPoE++	60 VDC	-40 °C	125 ¯C	Surface Mount	1
Analog Devices LT4293IDD#TRPBF	10-WFDFN Exposed Pad			10-DFN (3x3)	90 W	2 mA	802.3af (PoE) 802.3at (PoE+) 802.3bt LTPoE++	60 VDC	-40 °C	85 °C	Surface Mount	1

Catalog

LTPoE++/IEEE 802.3bt PD Interface Controller

Key Features

• LTPoE++®/IEEE 802.3bt Powered Device (PD) Controller

• Supports Up to 90W PDs

• Distinguishes Between LTPoE++ and IEEE 802.3bt PSEs

• 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

• Pin Compatible with LT4275A/B/C and LT4294

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

Description

The LT4293 is an LTPoE++/IEEE 802.3af/at/bt-compliant powered device (PD) interface controller. The T2P output distinguishes between LTPoE++ and IEEE 802.3bt power sourcing equipment (PSE) during mutual identification and negotiation of available power.The LT4293 utilizes an external, low RDS(ON), N-channel, hot swap MOSFET and supports the LT4320/LT4321 ideal bridges, to extend the end-to-end power delivery efficiency and eliminate costly heat sinks. The LT4293 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 LT4293 can be configured to support all possible LTPoE++, 802.3bt, 802.3at and 802.3af power levels with external component changes. Pin-for-pin compatibility with the LT4275 and LT4294 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