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Overview
| Topology | Flyback Converter |
| Input voltage | 8 V |
| Switching frequency | 214-300 kHz |
Description
The LT®4295 is an IEEE 802.3af/at/bt(Draft 2.0)-compliantpowered device (PD) interface controller with aswitching regulator controller. The T2P output indicatesthe number of classification events received during IEEE802.3bt-compliant mutual identification and negotiationof available power.
Features
IEEE 802.3af/at/bt(Draft 2.0) Powered Device (PD)with Forward/Flyback Controllern Supports Up to 71 Watt PDsn 5-Event Classification Sensingn Superior Surge Protection (100V Absolute Maximum)n Wide Junction Temperature Range (–40°C to 125°C)n >94% End-to-End Efficiency with LT4321 Ideal Bridgen External Hot Swap N-Channel MOSFET for LowestPower Dissipation and Highest System Efficiencyn No-Opto Flyback Operationn Auxiliary Power Support as Low as 9Vn Easy Migration of LTPoE++® PDs to IEEE 802.3bt PDsn Pin Compatible with LT4276A/B/Cn 28-Lead 4mm × 5mm QFN Package
Typical applications
- Commercial and Public Information Displays
- Outdoor Security Camera Equipment
- High Power Wireless Data Systems
- High Temperature Applications
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC max. (mΩ) | LR (µH) | ISAT (A) | Version | VIN | VOut1 (V) | IOut1 (A) | L (µH) | n | VT (V (AC)) | Size | LSmin. (µH) | Mount | Vaux (V) | RDC 1 (mΩ) | RDC 2 (mΩ) | RDC 3 (mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744316470 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 6 | 2.5 | 4.7 | 24.5 | 57 | Superflux | 26.95 | 3.3 | – | SMT | – | – | – | 4.7 | – | – | 5040 | – | SMT | – | – | – | – | ||
| 744314650 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 6.6 | 2 | 6 | 21.5 | 50 | Superflux | 23.65 | 4.5 | – | SMT | – | – | – | 6.5 | – | – | 7050 | – | SMT | – | – | – | – | ||
| 744314490 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 8.3 | 2.2 | 6.5 | 14.5 | 56 | Superflux | 15.95 | 3.4 | – | SMT | – | – | – | 4.9 | – | – | 7050 | – | SMT | – | – | – | – | ||
 | 7443330820 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCC SMT High Current Cube Inductor | 8.9 | 9.3 | 12.5 | – | 36 | Ferrite | 15 | 2.8 | – | SMT | – | – | – | 8.2 | – | – | 1090 | – | SMT | – | – | – | – | ||
| 744316022 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 29.9 | 14 | 25 | 1.25 | 507 | Superflux | 1.375 | 0.18 | – | SMT | – | – | – | 0.22 | – | – | 5040 | – | SMT | – | – | – | – | ||
 | 750310743 | SPEC | – | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE+ Power over Ethernet Plus Transformer | – | – | – | – | – | – | – | – | 3.2 | CCM Flyback | 37 - 57 V (DC) | 3.3 | 7.5 | 38 | 6.67:1:4 | 1500 | EP13 | 0.625 | SMT | 12.7 | 100 | 3 | 182 | |
 | 750313095 | SPEC | – | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE++ Power over Ethernet Plus Plus Transformer | – | – | – | – | – | – | – | – | – | Forward | 40 - 57 V (DC) | 5 | 17 | 175 | 3.5:1:2.25 | 2400 | EFD20 | – | SMT | 10.75 | 50 | 10 | 188 | |
 | 750313109 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE Power over Ethernet Transformer | – | – | – | – | – | – | – | – | 1.8 | Flyback | 36 - 57 V (DC) | 5 | 2.3 | 44 | 4:1:1:2.5 | 2400 | EP7 | – | SMT | 12 | 305 | 40 | 40 | ||
 | 750314782 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE Power over Ethernet Transformer | – | – | – | – | – | – | – | – | 2.75 | Flyback | 40 - 57 V (DC) | 24 | 1 | 37 | 1:1:0.56 | 2400 | EP13 | – | SMT | 12.5 | 79 | 60 | 116 | ||
 | 750314783 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE+ Power over Ethernet Plus Transformer | – | – | – | – | – | – | – | – | 3.8 | Flyback | 48 - 57 V (DC) | 5 | 7 | 26 | 4.5:1:2.5 | 2400 | EP13 | – | SMT | 12 | 94 | 7 | 233 | ||
 | 750315422 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE Power over Ethernet Transformer | – | – | – | – | – | – | – | – | 8.5 | Flyback | 9 - 57 V (DC) | 12 | 2 | 9 | 1:1.12:1 | 1500 | EFD20 | – | SMT | 10 | 12.5 | 14 | 385 | ||
| 750316115 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | ||
 | 750316116 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-PoE+ Power over Ethernet Plus Transformer | – | – | – | – | – | – | – | – | 7.7 | Flyback | 41 - 57 V (DC) | 12 | 4 | 18 | 2:1:1 | 1500 | EFD20 | – | SMT | 12 | 20 | 11 | 66 | ||
| 750316231 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744316470 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 744314650 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 744314490 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 7443330820 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 744316022 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | |
| 750310743 | SPEC | – |
| 750313095 | SPEC | – |
| 750313109 | SPEC | |
| 750314782 | SPEC | |
| 750314783 | SPEC | |
| 750315422 | SPEC | |
| 750316115 | SPEC | – | |
| 750316116 | SPEC | |
| 750316231 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC max. (mΩ) | LR (µH) | ISAT (A) | Version | VIN | VOut1 (V) | IOut1 (A) | L (µH) | n | VT (V (AC)) | Size | LSmin. (µH) | Mount | Vaux (V) | RDC 1 (mΩ) | RDC 2 (mΩ) | RDC 3 (mΩ) | Samples |
|---|