NCP1093MNRG - IEEE 802.3at PoE-PD Interface Controller | onsemi
MPN: NCP1093MNRG ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.91 | $2.91 |
| 10 | $2.71 | $27.10 |
| 100 | $2.48 | $248.00 |
| 500 | $2.26 | $1,130.00 |
| 1,000 | $2.05 | $2,050.00 |
NCP1093MNRG Overview
A PoE-PD interface controller is the front-end power-management IC inside any Powered Device that draws power over Ethernet cabling. Within the power-management hierarchy it sits between the RJ45/data transformer pair and the isolated DC-DC converter: it performs thePowered Device half of signature detection, classification, inrush limiting, and operational current limiting that the Power Sourcing Equipment (PSE) in the switch or injector expects before it will fully enable power on the cable.
Key features of the NCP1093 include integrated detection and classification meeting IEEE 802.3at Type 2, under-voltage lockout (UVLO), controlled inrush and operational current limiting to protect the internal pass path, and dedicated power good and NCLASS_AT status signals that guarantee proper sequencing of the downstream converter. The part is specified for industrial temperature grade operation, which broadens its use beyond office networking equipment.
Architecturally, the NCP1093 belongs to onsemi HIPO high-power PoE-PD family (NCP1093/NCP1094), which integrates all required PD interface functions into a compact 10-pin footprint. Integration of the pass-element control and classification logic reduces bill-of-material count versus discrete detection/classification circuits, and the exposed-pad DFN provides low thermal resistance for the internal MOSFET drive path. The device operates with a very low control-side current (approximately 5 mA class of control consumption per distributor specification tables) to keep the PD signature within standard limits during detection.
Typical applications include PoE+ IP surveillance cameras, IEEE 802.11ac wireless access points, VoIP telephones, PoE LED lighting luminaires, and industrial network edge devices that must be powered directly from the Ethernet cable. In each case the NCP1093 interfaces the PSE to the isolated flyforward or flyback converter that generates the system low-voltage rails.
A key design consideration: onsemi has officially marked the NCP1093MNRG as end-of-life (EOL), with a last order date of 1 March 2024 and last ship date of 31 December 2024. The recommended follow-on is the NCP1081 family, which comes in a different package, so new designs must not start with this part. Existing designs should plan a footprint change or secure last-time-buy stock.
This page synthesizes distributor pricing, EOL status details, drop-in alternative scarcity analysis, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for NCP1093MNRG — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
NCP1094MNRG
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
NCP1093MNG
✅ Drop-In📋 Reference alternative (not in catalog)
NCP1093MNRG Specifications
| Function | IEEE 802.3at PoE-PD Interface Controller |
| PoE Standards Supported | IEEE 802.3af (PoE), IEEE 802.3at (PoE+) |
| Number of Channels | 1 |
| Input Voltage Range | 0 V to 57 V |
| Control Current | 5 mA |
| Package | 10-DFN (3x3 mm) exposed pad (HVSON, no-lead) |
| Number of Terminals | 10 |
| Terminal Form | No Lead |
| Package Shape | Square |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial |
| Protection Features | Under-voltage lockout, inrush current limit, operational current limit |
| Status Signals | Power good, NCLASS_AT |
| Lifecycle Status | EOL - last orders 2024-03-01, last shipments 2024-12-31 |
NCP1093MNRG square Pin Configuration Guide
Pin configuration for NCP1093MNRG (square package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for NCP1093MNRG.
Refer to the datasheet for full pin configuration.
Typical Applications
NCP1093MNRG is suitable for 6 applications: PoE+ IP Surveillance Cameras, IEEE 802.11 Wireless Access Points, VoIP Telephones, PoE LED Lighting Luminaires, Industrial Network Edge Devices, PoE Splitter and Midspan Modules.
PoE+ IP Surveillance Cameras
The NCP1093MNRG is a natural front-end for IEEE 802.3at (PoE+, up to 25.5 W at the PD) network cameras because it integrates the complete PD handshake - detection, classification (Class 4 signaling via NCLASS_AT), UVLO, and two-stage inrush/operational current limiting - that the PSE requires before enabling full power. It sits between the Ethernet magnetics and rectifier bridge and the isolated camera power converter, asserting its power good signal only after inrush completes, guaranteeing the SoC and image sensor rails start in a controlled sequence. Its 0 V to 57 V input tolerance covers the full PoE range including long-cable drops, and the industrial temperature grade suits outdoor enclosures where ambient can span well beyond office conditions.
Recommended
IEEE 802.11 Wireless Access Points
Enterprise Wi-Fi access points are commonly powered solely from the Ethernet cable, making a compliant PD interface mandatory. The NCP1093MNRG provides the full IEEE 802.3af/802.3at interface in a compact 10-pin DFN (3x3 mm), conserving board area on crowded AP main boards. Its 5 mA class control consumption keeps the PD signature within standard limits during detection, and the NCLASS_AT output lets the system firmware distinguish PoE+ Class 4 sourcing so the AP can budget RF transmit power against available cable power. The integrated operational current limit protects the rail if the RF power amplifier stage faults, while the exposed-pad package dissipates pass-element control losses without an external heatsink.
Recommended
VoIP Telephones
PoE VoIP desk phones benefit from the NCP1093MNRG's single-chip integration of detection, classification, and inrush control, replacing discrete MOSFET-plus-comparator solutions that need more calibration and layout effort. The controller's UVLO and power-good signaling guarantee the phone's DSP and display rails only start after the PSE has validated and classified the port, preventing brown-out resets during cable hot-plug events. Its 57 V maximum rating withstands PSE open-circuit transients. Because the phone chassis is typically plastic and airflow-free, the compact thermally enhanced DFN-10 is preferable to larger SOIC PD controllers. Note this part is EOL, so new phone platforms should adopt NCP1081.
Recommended
PoE LED Lighting Luminaires
IEEE 802.3bt/PoE lighting systems use Ethernet cabling to deliver both data and power to LED drivers. The NCP1093MNRG serves as the PD front-end for 802.3at-fed luminaires: it performs classification so the PSE allocates sufficient wattage, then gates power to the downstream LED constant-current converter with controlled inrush, protecting both the cable and the driver. Its industrial temperature grade and no-lead 3x3 mm DFN package fit enclosed driver modules in ceiling fixtures where thermal derating is strict. The NCLASS_AT flag allows the lighting controller to confirm PoE+ power availability before enabling full lamp output. For new luminaires at higher power classes, migrate to the NCP1081 family.
Recommended
Industrial Network Edge Devices
Industrial Ethernet nodes - sensors, gateways, and I/O modules - increasingly draw power over the network cable to simplify cabinet wiring. The NCP1093MNRG's industrial temperature grade, robust 0 V to 57 V input tolerance, and integrated current limiting make it appropriate for these environments, where long cable runs produce wide voltage swings at the PD input. The two-stage inrush scheme complies with the PSE port-capacitance budget even with large bulk input capacitors common in industrial front ends, and the power-good output sequences the system's isolated converter only after the port is fully classified. The compact 10-DFN suits dense DIN-rail module PCBs. Plan migration to NCP1081 for new designs due to EOL status.
Recommended
PoE Splitter and Midspan Modules
PoE splitters that feed non-PoE equipment, and passive-injector accessory modules, require a standards-compliant PD front end to present a valid detection and classification signature to the switch port. The NCP1093MNRG provides that handshake plus inrush and operational current limiting in a minimal footprint, ensuring the PSE never trips on signature or overload faults. Its NCLASS_AT and power-good outputs let splitter firmware gate the output connector only after classification, advertising correct power class to the attached device. The 57 V rating absorbs PSE transients on hot-plug. Because this module category is cost-sensitive and long-lived, EOL status is a key concern - design new modules on NCP1081.
Recommended
Recommended Products Summary
Engineering reference data for NCP1093MNRG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | NCP1094MNRG | NCP1093MNG | NCP1081DEG |
|---|---|---|---|---|
| Package | 10-DFN (3x3 mm) exposed pad | 10-DFN (3x3 mm) - same footprint | 10-DFN (3x3 mm) - same footprint | Different package - not drop-in |
| Brand | onsemi | onsemi | onsemi | onsemi |
| PoE Standard | IEEE 802.3af / 802.3at | IEEE 802.3af / 802.3at | IEEE 802.3af / 802.3at | IEEE 802.3af / 802.3at / 802.3bt family |
Key Differentiators
- True PD-family drop-in availability on same footprint (vs NCP1094MNRG)
- Higher-power successor family path (vs NCP1081DEG)
- Honest trade-off: EOL status (vs NCP1081DEG)
Design Notes
The single most important issue with NCP1093MNRG is supply, not circuit design: onsemi confirmed the part is EOL with a last order date of 1 March 2024 and last ship date of 31 December 2024. Do not start new designs; use NCP1081. For legacy designs, calculate remaining service-life stock now and place last-time-buy orders or qualify a footprint change. Broker-sourced EOL parts carry elevated counterfeit risk - require date-code verification and test samples before trusting open-market inventory.
Place the NCP1093's exposed pad on a solid ground copper area with multiple thermal vias (typical practice: 4-6 vias of 0.3 mm on the pad) to sink pass-path heat and anchor the RTN return. Keep the loop from the Ethernet rectifier bridge, through the detection/classification sense elements, to the DFN as short and wide as possible - PoE front ends carry the full port current in this loop. Respect the PSE port-capacitance budget: keep total PD-side input capacitance within the IEEE limit so the inrush ramp completes without PSE disconnect.
Estimate: with a PoE+ port delivering up to about 25.5 W at the PD and a typical conversion efficiency around 85-90% in the downstream isolated converter, the interface stage itself dissipates little power, but long-cable operation can drop the PD input toward the low end of the PoE range, raising input current. Verify the current-limit threshold of the NCP1093 pass path covers the worst-case low-voltage, full-load operating point with margin, and confirm the downstream converter's soft-start draw stays within the operational current limit during power good sequencing.
Compliance Information
Compliance data not present in the verified web data retrieved. No-lead (HVSON/DFN) package construction is consistent with lead-free RoHS-era packaging, but this was not confirmed from the provided sources - consult the onsemi product page for RoHS/REACH certificates.
