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LINEAR TECHNOLOGY  LT4321IUF#PBF  Special Function IC, Ideal Diode Controller, 20 V to 80 V in, QFN-16

LINEAR TECHNOLOGY LT4321IUF#PBF
Manufacturer Part No:
LT4321IUF#PBF
Order Code:
2366004
Technical Datasheet:
See all Technical Docs

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Product Overview

The LT4321IUF#PBF is a dual Ideal Diode Bridge Controller that enables a power over Ethernet (PoE) powered device (PD) to receive power in either voltage polarity from RJ-45 data pairs, spare pairs or both. The LT4321 and eight N-channel MOSFETs replace the eight diodes in a passive PoE rectifier bridge. The LT4321 eases thermal design and increases delivered power. An internal charge pump allows an all-NMOS bridge eliminating larger and more costly PMOS switches. High impedance input sense pins prevent reverse current on unused pairs. If the power source fails or is shorted, a fast turn-OFF minimizes reverse current transients. Unlike discrete ideal bridge solutions, the LT4321 will operate through transients without enabling the MOSFETs on unpowered pairs.
  • Reduces heat, eliminates thermal design problems
  • Maximizes power efficiency
  • Less than 800µA quiescent operating current
  • Fully compatible with IEEE 802.3 detection and classification
  • IEEE 802.3 compliant when paired with a Powered Device (PD) controller
  • Works with 2-pair and 4-pair PoE applications
  • Compatible with PoE, PoE+ and LTPoE++™
  • Green product and no Sb/Br

Product Information

IC Function:
Ideal Diode Controller
Supply Voltage Min:
20V
Supply Voltage Max:
80V
IC Package Type:
QFN
No. of Pins:
16Pins
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Packaging:
Each
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Communications & Networking
  • Signal Processing
  • Power Management

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000389

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