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LTC4271IUF#PBF
POE IC, PSE Controller, 57 V Input, 1 MHz, 12 Channels, 25 V UVLO, -40 to 85 °C, QFN-EP-24
Date/Lot Code
- Manufacturer:
- ANALOG DEVICES ANALOG DEVICES
- Manufacturer Part No:
- LTC4271IUF#PBF
- Newark Part No.:
- 51AK7156
- Technical Datasheet:
- LTC4271IUF#PBF Datasheet
Product Overview
LTC4271 is an 8-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at type 1 and type 2 (high power) compliant Power over Ethernet (PoE) systems. Transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply resulting in significant BOM cost savings. This device chipset delivers lowest-in-industry heat dissipation by utilizing low-RDS(ON) external MOSFETs and 0.25 ohm sense resistors. Advanced power management features include per-port 12bit current monitoring ADCs, DAC-programmable current limit, and versatile fast shut-down of preselected ports. Advanced power management host software is available under a no-cost license. PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with 2-event classification and a 2 second backoff timer. It is widely used in application like PoE PSE switches/routers, PoE PSE midspans.
- Reduced BOM cost, eliminates upto 6 high speed opto-couplers
- VEE and VPORT monitoring
- 1 second rolling IPORT averaging
- Supports 2-pair and 4-pair output power
- 1MHz I²C compatible serial control interface
- VDD supply voltage is 3.3V typical
- VDD supply current is 10mA typical
- Undervoltage lock-out is 2.7V typical at (VDD – DGND)
- Operating ambient temperature is -40°C to 85°C
- Package style is 24-lead plastic QFN
Product Information
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- PSE Controller
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- 57V
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- -
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- 25V
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- QFN-EP
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- 24Pins
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- 12Channels
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- -
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- 6.3%
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- 1MHz
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- -40°C
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- 85°C
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- -
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- MSL 1 - Unlimited
Technical Documents (1)
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$9.29
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