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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
- Technical Datasheet:
- LTC4271IUF#PBF Datasheet
- ECAD / MCAD
-
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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- :
- IEEE 802.3af, 802.3at, LTPoE++
- :
- PSE Controller
- :
- 57V
- :
- -
- :
- 25V
- :
- QFN-EP
- :
- 24Pins
- :
- 12Channels
- :
- -
- :
- 6.3%
- :
- 1MHz
- :
- -40°C
- :
- 85°C
- :
- -
- :
- MSL 1 - Unlimited
Technical Documents (1)
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179 UK stock available for 5-6 business days delivery
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CNY65.04
( ex VAT )
CNY73.4952
( inc VAT )
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|---|---|---|
| 1+ | CNY65.04 CNY73.4952 | ( ) |
| 10+ | CNY58.73 CNY66.3649 | ( ) |
| 91+ | CNY56.00 CNY63.28 | ( ) |
| 182+ | CNY48.63 CNY54.9519 | ( ) |
| 273+ | CNY46.44 CNY52.4772 | ( ) |
| 546+ | CNY42.34 CNY47.8442 | ( ) |
| 1001+ | CNY36.88 CNY41.6744 | ( ) |
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