LT4321 datasheet(1/12 Pages) LINER

tên linh kiện	LT4321

Giải thích chi tiết về linh kiện	High Efficiency IEEE802.3bt (PoE, Type 3,40W) PD with PoE Ideal Diode Bridge

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nhà sản xuất	LINER [Linear Technology]

Trang chủ	http://www.linear.com

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1

dc2475aafb

DEMO MANUAL

DC2475A-A

Description

LT4295, LT4321

High Efficiency IEEE802.3bt (PoE++, Type 3,

40W) PD with PoE Ideal Diode Bridge

Demonstrationcircuit2475A-AisanIEEE802.3bt(Draft2.0)

compliant Power over Ethernet (PoE) powered device (PD).

ItfeaturestheLT®4295PDinterfaceandswitchingregulator

controllerwiththeLT4321PoEidealdiodebridgecontroller.

The LT4295 provides IEEE802.3af (PoE, Type 1),

IEEE802.3at (PoE+, Type 2), and IEEE802.3bt (PoE++,

Type 3 and 4) compliant interfacing and power supply

control. It utilizes an external, low RDS(ON) (57mΩ typi-

cal) N-channel FET for the Hot Swap function to improve

efficiency. The LT4295 controls a DC/DC converter that

utilizes a highly efficient flyback topology with synchro-

nous rectification.

The LT4321 controls eight low RDS(ON) (57mΩ typical)

N-channel FETs to further improve end-to-end power

L

, LT, LTC, LTM, Linear Technology, the Linear logo and LTPoE++ are registered trademarks of

Analog Devices, Inc. All other trademarks are the property of their respective owners.

performance summary

BoarD photo

delivery efficiency and ease thermal design. This solution

replaces the eight diodes typically found in a passive PoE

rectifier bridge.

The DC2475A-A accepts up to 40W of delivered power

from a power sourcing equipment (PSE) via the RJ45

connector (J1) or a local 48VDC power supply using the

auxiliary supply input. When both supplies are connected,

the auxiliary supply input has priority over the PoE input.

The DC2475A-A supplies a 12V output at up to 3A.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2475A-A

Top Side

PARAMETER

CONDITIONS

VALUE

Port Voltage (VPORT)

At RJ45

37V to 57V

Auxiliary Voltage

From AUX+ to AUX– Terminals

37V to 57V

Output Voltage (VOUT)

12V (Typical)

Output Current (IOUT)

3A (Max)

Output Voltage Ripple

VPORT = 44V, IOUT = 3A

85mVP-P (Typical)

Load Regulation

±0.1% (Typical)

Efficiency

VPORT = 50V, IOUT = 3A, End-to-End

92% (Typical)

Switching Frequency

250kHz (Typical)

Bottom Side

Số phần tương tự - LT4321

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Linear Technology	LT4321	177Kb / 12P	PoE Ideal Diode Bridge Controller
	LT4321	785Kb / 10P	PoE PD with Synchronous Flyback and Ideal Diode Bridge
	LT4321	786Kb / 10P	IEEE 802.3bt Powered Device
	LT4321	177Kb / 12P	PoE Ideal Diode Bridge Controller

More results

Mô tả tương tự - LT4321

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Linear Technology	LT4275	222Kb / 12P	LTPoE/PoE/PoE PD Controller
	LT4275	222Kb / 12P	LTPoE/PoE/PoE PD Controller
	LT4321	177Kb / 12P	PoE Ideal Diode Bridge Controller
	LT4276	442Kb / 26P	LTPoE/PoE/PoE PD Forward/Flyback Controller
ON Semiconductor	NCP1093	127Kb / 12P	PoE-PD Interface Controller April, 2017 ??Rev. 4
Linear Technology	LT4276	785Kb / 10P	PoE PD with Synchronous Flyback and Ideal Diode Bridge
Texas Instruments	TPS23730	1Mb / 53P	TPS23730 IEEE 802.3bt Type 3 PoE PD with High Efficiency DC-DC Controller
Microchip Technology	PD-9501GC	417Kb / 2P	Single-Port IEEE802.3bt 60W Gigabit PoE Midspan 6/21
Bourns Electronic Solut...	POE-EP	1,007Kb / 8P	POE-EP & POE-PD Series - PoE DC/DC Transformers Mar 31, 2015
AAEON Technology	UP-POE-A20-0001	520Kb / 1P	PoE Ideal Diode Bridge & PD Forward/Flyback Controller

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