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ANALOG DEVICES LTC4271IUF#PBF
POE IC, PSE Controller, 57 V Input, 1 MHz, 12 Channels, 25 V UVLO, -40 to 85 °C, QFN-EP-24
- Manufacturer:
- ANALOG DEVICES ANALOG DEVICES
- Manufacturer Part No:
- LTC4271IUF#PBF
- Order Code:
- 4026192
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- Technical Datasheet:
- LTC4271IUF#PBF Datasheet
- ECAD / MCAD
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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
Footnotes
ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party
Product Information
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- IEEE 802.3af, 802.3at, LTPoE++
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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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- 6.3%
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- 1MHz
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- Surface Mount
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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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147 deliver in 3-4 business days from our UK warehouse
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¥1,379.71
(¥1,517.68 Inc. JCT)
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