LT4294HDD#PBF

LT®4294 is an IEEE 802.3af/at/bt-compliant powered device (PD) interface controller. The T2P output indicates the number of classification events received during IEEE 802.3bt-compliant mutual identification and negotiation of available power. This 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. This also includes a power good output, on-board signature resistor, undervoltage lockout, and thermal protection. Start-up inrush current is adjustable with an external capacitor. Pin-for-pin compatibility with the LT4275 family of PD interface controllers enables easy migration between LTPoE++ PDs and IEEE 802.3btcompliant PDs. Typical applications are high power wireless data systems, outdoor security camera equipment, commercial and public information displays, high temperature industrial applications.

• Auxiliary power override is supported as low as 9V with the AUX pin
• 5-event classification sensing, superior surge protection
• 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
• VPORT aux mode range from 8 to 60V (at VPORT pin, AUX <gt/> VAUXT, TA=25°C)
• Supply current is 2mA max (VVPORT=VHSSRC=57V, TA=25°C)
• 10-lead plastic DFN package
• Temperature rating range from -40°C to 125°C

บันทึก

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