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Details
| Topologie | Sonstige Topologie |
| IC-Revision | 1 |
Beschreibung
The LTC4279 is an autonomous single port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1, Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems. The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++ compliant operation without a microcontroller. The LTC4279 simplifies PSE implementation, requiring only a single supply and a small number of passive support components.The LTC4279 delivers lowest-in-industry heat dissipation by utilizing a low-RDS(ON) external MOSFET and a 0.1Ω sense resistor, eliminating the need for expensive heat sinks and increasing efficiency.PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with physical layer classification and a 2.5 second backoff timer.Legacy and custom PDs are supported with pin-selectable LEGACY and UltraPWR modes. LEGACY mode detects and powers pre-IEEE specification PDs. UltraPWR mode aggressively turns on and powers custom PDs requiring high inrush and/or operational currents.
Eigenschaften
- Compliant with IEEE 802.3at Type 1 and 2
- Supports LTPoE++® Up to 90W
- Supports Dual-Signature PDs
- Fully Autonomous Operation without Microcontroller
- Very Low Power Dissipation
- 0.1Ω Sense Resistance
- Low RDS(ON) External MOSFET
- Very High Reliability 4-Point PD Detection
- 2-Point Forced Voltage and Forced Current
- Robust Short-Circuit Protection
- Cable Surge Protected ±80V OUT pin
- Classification Dependent ICUT and ILIM Current Thresholds
- Supports 2-Pair and 4-Pair Output Power
- UltraPWR Mode Supports Custom PDs up to 123W
- Pin-Selectable Detection Backoff Timer for Midspans
- Pin Programmable Legacy PD Detection
- Pin Programmable Maximum Power Mode
- Status LED Pin
- Available in 20-Pin QFN and 16-Pin SO Packages
Typische Anwendungen
- PoE PSE Endpoints (Switch/Router), PoE Midspan Power Injectors, Power Forwarders, Femto Cells, Security Systems
Weiterführende Informationen
Artikeldaten
| Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | L (mm) | f (mm) | xPxC | Anwendungssystem | H (mm) | Betätigungskraft (Value) (g) | Elektrische Lebensdauer (Cycles) | Actuator-Farbe | Dampfphasenprozess | Datenrate | Ports | PoE | Improved CMRR | Betriebstemperatur | VT (V (RMS)) | Montageart | L (µH) | Pins (pcs) | Reihen | Gender | Typ | IR (A) | Verpackung | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 62000311121 | SPEC | – | 6 Dateien | WR-PHD 2.00 mm THT Pin Header | 6 | – | – | – | – | – | – | – | – | – | – | – | – | -40 °C up to +105 °C | – | THT | – | 3 | Single | Pin Header | Gerade | 2 | Beutel | |
 | 702935000 | SPEC | – | 3 Dateien | WA-SNSR Self-Retaining Spacer | 12.7 | 4.8 | – | – | – | – | – | – | – | – | – | – | – | -30 °C up to +85 °C | – | – | – | – | – | – | – | – | – | |
 | 7490220123 | SPEC Anstehende PCNAufgrund einer anstehenden PCN wird sich in Kürze das Datenblatt des ausgewählten Produktes ändern. Anbei finden Sie das neue Datenblatt, sowie das noch gültige Datenblatt. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter. | 8 Dateien | WE-LAN LAN Übertrager | 18.04 | – | – | – | 9.05 | – | – | – | – | 1000 Base-T | 1 | 4PPoE (bis zu 1500 mA) | Nein | -40 °C up to +105 °C | 1500 | SMT | 180 | 24 | – | – | 4PPoE (to 1400 mA) | – | – | ||
 | 615008142621 | SPEC | – | 7 Dateien | WR-MJ Modular Jack Horizontal Shielded Rear Grounding Post 8P8C Tab Down | – | – | 8P8C | CAT 3 | – | – | – | – | – | – | 1x1 | – | – | -40 °C up to +85 °C | – | THT | – | – | – | – | Horizontal | 1.5 | Tray | |
 | 434123050816 | SPEC | – | 5 Dateien | WS-TASV J-Bend SMT Tact Switch 6.0x3.5 mm | – | – | – | – | 5 | 160 | 50000 | Schwarz | nicht spezifiziert | – | – | – | – | -40 °C up to +85 °C | – | – | – | – | – | – | – | 0.05 | Tape and Reel | |
 | 60800213421 | SPEC | – | 3 Dateien | WR-PHD 2.00 mm Jumper with Test Point | – | – | – | – | – | – | – | – | – | – | – | – | – | -25 °C up to +105 °C | – | – | – | 2 | – | Jumper | – | 3 | Beutel |
| Artikel Nr. | Datenblatt | Simulation | |
|---|---|---|---|
| 62000311121 | SPEC | – |
| 702935000 | SPEC | – |
| 7490220123 | SPEC Anstehende PCNAufgrund einer anstehenden PCN wird sich in Kürze das Datenblatt des ausgewählten Produktes ändern. Anbei finden Sie das neue Datenblatt, sowie das noch gültige Datenblatt. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter. | |
| 615008142621 | SPEC | – |
| 434123050816 | SPEC | – |
| 60800213421 | SPEC | – |
| Muster |
|---|
| Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | L (mm) | f (mm) | xPxC | Anwendungssystem | H (mm) | Betätigungskraft (Value) (g) | Elektrische Lebensdauer (Cycles) | Actuator-Farbe | Dampfphasenprozess | Datenrate | Ports | PoE | Improved CMRR | Betriebstemperatur | VT (V (RMS)) | Montageart | L (µH) | Pins (pcs) | Reihen | Gender | Typ | IR (A) | Verpackung | Muster |
|---|