MP8009AGV-Z - 802.3af/at PoE PD Interface & Flyback Controller | MPS
MPN： MP8009AGV-Z ✓ 啟用中MP8009AGV-Z 概覽
A PoE powered device interface is the circuitry at the powered end of an Ethernet link that negotiates and receives power from a PoE switch or injector (the power sourcing equipment, PSE). Within the power management IC hierarchy, the MP8009AGV-Z belongs to the PoE powered device controller family, a subset of Power over Ethernet power interface ICs used in networking and industrial connectivity systems.
Key features include full IEEE 802.3af/at functionality covering detection, 1-event and 2-event classification, a 120 mA inrush current limit, an 840 mA operational current limit, and an integrated 100 V rated hot-swap MOSFET that eliminates an external pass device. A 32 ms soft-start time gives controlled converter startup.
On the converter side, the flyback/forward controller supports isolated and non-isolated PD power supply topologies, allowing designers to build the downstream DC-DC conversion stage around a single controller IC. Integration of the hot-swap MOSFET, PD interface state machine, and converter controller reduces bill-of-material count and board area compared with discrete PD interface plus separate PWM controller solutions.
Typical applications include IP security cameras, wireless access points, VoIP phones, and networked industrial sensors that draw power directly over the Ethernet cable, where the MP8009AGV-Z provides PD detection, classification, inrush limiting, and isolated flyback conversion from the 48 V PoE input rail.
Design consideration: verify transformer selection and feedback loop compensation against the MPS MP8009A datasheet design equations, and ensure PCB creepage on the 100 V input side meets the requirements of the target PoE class and isolation specification.
This page synthesizes distributor pricing, drop-in alternative analysis, application guidance, and practical design notes not found in the manufacturer datasheet, with data verified against MPS and distributor sources as of 2026-10-19.
直接替換替代品，適用於 MP8009AGV-Z — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
MP8009AGV
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MP8009A
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MP8009AGV-Z 最大額定值與電氣特性
| Product Type | IEEE 802.3af/at PoE Powered Device (PD) interface with flyback/forward controller |
| PoE Standard | IEEE 802.3af and IEEE 802.3at compliant |
| PD Interface Functions | Detection, 1-event and 2-event classification |
| Inrush Current Limit | 120 mA |
| Operational Current Limit | 840 mA |
| Integrated Hot-Swap MOSFET Rating | 100 V |
| Soft-Start Time | 32 ms |
| Converter Topology | Flyback / Forward controller |
| 封裝 | 28-QFN (4x5 mm) |
| 安裝類型 | Surface Mount |
MP8009AGV-Z 28-qfn (4x5 mm) 腳位配置指南
MP8009AGV-Z（28-qfn (4x5 mm) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： MP8009AGV-Z.
請參閱 資料表 以查看完整腳位配置。
典型應用
MP8009AGV-Z 適用於 6 應用s: IP Security Cameras, Wireless Access Points, VoIP Phones, Industrial Networked Sensors, Building Automation and Access Control, Networked Audio and Video Extenders.
IP Security Cameras
IP cameras are the highest-volume PoE powered device application, drawing their entire operating power over the Ethernet cable from a PoE switch. The MP8009AGV-Z fits this role because its IEEE 802.3af/at-compliant PD interface handles detection and 1-event/2-event classification required by the PSE, while the 120 mA inrush limit prevents the switch port from tripping during camera power-up. The integrated 100 V hot-swap MOSFET handles the full 37-57 V PoE input range with margin, and the on-chip flyback controller implements the isolated converter that generates the camera's 3.3 V, 5 V, and sensor rails. The 32 ms soft-start avoids output overshoot during IR-LED burst loads.
推薦
Wireless Access Points
Enterprise 802.11ac/ax wireless access points typically draw 12-25 W from an 802.3at (PoE+) switch port, making the MP8009AGV-Z a strong fit. Its 2-event classification correctly signals Class 4 power to the PSE, and the 840 mA operational current limit covers the transient peaks caused by radio transmit bursts. The integrated flyback/forward controller converts the nominal 48 V PoE input to the access point's internal rails with isolation where required. Because the PD interface, hot-swap MOSFET, and converter controller share one 28-QFN (4x5 mm) package, designers save board area inside the access point enclosure compared with discrete PD interface plus separate PWM solutions.
推薦
VoIP Phones
VoIP desk phones are classic 802.3af Class 2-3 powered devices, powered entirely from the PBX switch port. The MP8009AGV-Z provides the required detection signature, 1-event classification, and inrush limiting so the phone powers up without falsely tripping the port. The integrated flyback controller supports the multi-output isolated converter that phones typically use to generate audio, LAN PHY, and display rails from the PoE input. The 32 ms soft-start coordinates power-up with the phone's processor reset supervisor. The 100 V hot-swap MOSFET rating provides robust margin against PoE input transients from long cable runs.
推薦
Industrial Networked Sensors
Industrial sensors and actuators increasingly use PoE for combined data and power in factory automation, eliminating separate power wiring. The MP8009AGV-Z suits these nodes because the PoE input provides galvanic isolation options via the flyback topology, and the PD interface's classification lets a managed industrial switch budget power per port. The 120 mA inrush limit and 32 ms soft-start allow many sensors to start simultaneously without collapsing the switch power budget. The integrated 100 V hot-swap MOSFET tolerates the long cable inductance typical of industrial Ethernet runs, and the compact 28-QFN (4x5 mm) package fits small sensor housings.
推薦
Building Automation and Access Control
Door controllers, card readers, and building automation panels are commonly powered over PoE infrastructure in modern buildings. The MP8009AGV-Z handles the powered device side: detection, classification, 120 mA inrush limiting, and the downstream flyback/forward conversion from the 48 V PoE feed to panel logic rails. The 840 mA operational current limit accommodates lock-actuation and reader-transient loads, while the integrated hot-swap MOSFET eliminates an external 100 V-rated pass device. The IEEE 802.3af/at compliance ensures interoperability across the mixed vendor PoE switches typical of building networks, per the MPS MP8009A datasheet.
推薦
Networked Audio and Video Extenders
PoE-based AV extenders, media converters, and intercoms deliver audio/video endpoints both data and power over one cable. The MP8009AGV-Z provides the PD interface handshake (detection plus 1-event/2-event classification) and inrush control required by the sending PSE, then the integrated flyback/forward controller generates the endpoint's isolated low-voltage rails. The 32 ms soft-start prevents audible pops or video glitches during plug-in events, and the 100 V hot-swap MOSFET rating gives margin on the 57 V maximum PoE input. Using one 28-QFN (4x5 mm) IC for both PD interface and converter controller keeps extender dongle designs compact.
推薦
推薦產品摘要
工程參考資料，適用於 MP8009AGV-Z — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MP8009AGV | MP8009A |
|---|---|---|---|
| Package | 28-QFN (4x5 mm) | 28-QFN (4x5 mm) - same | 28-QFN (4x5 mm) - same |
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| PoE Standard | IEEE 802.3af/at | IEEE 802.3af/at | IEEE 802.3af/at |
| Inrush Current Limit | 120 mA | 120 mA | 120 mA |
| Operational Current Limit | 840 mA | 840 mA | 840 mA |
| Integrated Hot-Swap MOSFET | 100 V rated | 100 V rated | 100 V rated |
| Soft-Start Time | 32 ms | 32 ms | 32 ms |
| Converter Topology | Flyback / Forward controller | Flyback / Forward controller | Flyback / Forward controller |
主要差異化特點
- Fully integrated single-chip PoE PD solution (對比TPS2375)
- Full 2-event classification for PoE+ (對比Basic 802.3af-only PD ICs)
- Fast controlled startup (對比MP8009A family members)
設計說明
Respect the 120 mA inrush current limit when sizing the converter input capacitance. The input capacitor bank must charge within the PoE inrush window; excessive bulk capacitance extends charge time and can cause the PSE to disconnect the port as a fault. Calculate the total input capacitance per the MPS MP8009A datasheet design procedure, and place bulk capacitance after the hot-swap MOSFET so inrush is actively limited. The 840 mA operational limit defines the steady-state envelope for the downstream flyback stage.
Maintain adequate creepage and clearance on the 100 V PoE input side, especially for isolated flyback designs: separate the primary (PoE input) and secondary (output) grounds on the PCB and keep the transformer isolation barrier free of traces. The integrated hot-swap MOSFET path should be short and wide to minimize parasitic inductance during inrush and fault transients. Provide a solid thermal pad connection under the 28-QFN (4x5 mm) package for heat spreading from the converter controller.
Classification resistors must match the intended PoE class (802.3af 1-event or 802.3at 2-event); an incorrect class signature causes the PSE to budget wrong power or refuse detection. Also verify the soft-start behavior: the MP8009A specifies a 32 ms soft-start, and adding large output capacitance downstream can interact with this startup profile. For isolated designs, follow the MP8009A datasheet transformer selection equations for the 37-57 V PoE input range rather than generic flyback tables.
合規資訊
The -Z suffix in MPS ordering codes typically denotes a lead-free/RoHS packaging option, but explicit compliance statements were not present in the verified web data. Confirm RoHS/REACH status on the MPS MP8009A product page before export-controlled shipments.
