LT4275 PD Controller
LT4275 LTPoE++/PoE+/PoE PD controller from Analog Devices
The LT4275 from Analog Devices is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers.
The LT4275A employs a proprietary LTPoE++ classification scheme, delivering 38.7 W, 52.7 W, 70 W, or 90 W of power at the PD RJ45 connector. The LT4275A is fully compatible with IEEE 802.3. The LT4275B is an IEEE 802.3at compliant, Type 2 (PoE+) PD delivering up to 25.5 W.
The LT4275 internal charge pump provides an N-channel MOSFET solution, eliminating a larger and more costly P-channel MOSFET. A low RDS(ON) MOSFET also maximizes power delivery and efficiency, reduces power and heat dissipation, and eases thermal design. Startup inrush current is adjustable with an external capacitor. The LT4275 also includes a power good output, on-board signature resistor, under-voltage lockout, and thermal protection. The LT4275A / LT4275B drives a single opto-coupler to indicate the power level of the attached PSE. Pin-selectable support for non-standard low voltage operation is provided. Auxiliary power override is supported with the AUX pin.
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LT4275 PD Controller
图片 | 制造商零件编号 | 描述 | 可供货数量 | 价格 | 查看详情 | |
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LT4275AIDD#PBF | IC POE CNTRL 1 CHANNEL 10DFN | 1220 - 立即发货 | $52.26 | 查看详情 | ||
LT4275BIMS#PBF | IC POE CNTRL 1 CHANNEL 10MSOP | 269 - 立即发货 | $44.04 | 查看详情 |