PD70210ILD-TR - 802.3at PoE PD Controller with 0.3 Ohm FET | Microchip
MPN： PD70210ILD-TR ✓ 啟用中PD70210ILD-TR 概覽
A Powered Device interface controller is the front-end power-management IC in a Power over Ethernet system. It sits between the Ethernet cable (via the transformer center taps and bridge rectifier) and the isolated DC-DC converter inside the powered device, within the broader hierarchy: PoE PD controller -> power management IC -> semiconductor. It performs the detection, classification, inrush control, and disconnect functions mandated by the IEEE 802.3af and 802.3at standards.
Key features include support for IEEE 802.3af, 802.3at, HDBaseT, and general 2-pair or 4-pair power configurations; an internal 0.3 ohm pass FET that eliminates an external external pass transistor; and an advanced classification block supporting 2, 3, 4, and 6 event classification for full 802.3at and Power-over-HDBaseT (PoH) negotiation.
The IC identifies, via its SUPP_Sx pins, which of the four cable pairs actually receive power and generates the corresponding flags. An internal bleeder rapidly discharges the input capacitor of the downstream DC-DC converter, ensuring fast re-detection and port power-up when the Ethernet cable is suddenly removed and reinserted into the RJ45 jack.
Typical applications include IP security cameras, wireless access points, VoIP phones, HDBaseT extenders, and networked industrial equipment powered over 2-pair or 4-pair PoE infrastructures. The integrated FET and full protection set reduce external component count.
Design consideration: verify the classification resistor settings against the downstream DC-DC converter power class so the PSE allocates sufficient power, and confirm inrush capacitor sizing per the IEEE timing windows.
This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 PD70210ILD-TR — 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。
PD70210AILD-TR
✅ 直接替換📋 參考替代品（不在目錄中）
PD70210ALILD
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PD70210ILD-TR 最大額定值與電氣特性
| 功能 | PoE Powered Device (PD) front-end interface controller |
| Number of Channels | 1 |
| Standards Supported | IEEE 802.3af (PoE), IEEE 802.3at (PoE+), HDBaseT / PoH |
| Pair Configuration | 2-pair or 4-pair |
| Internal Pass FET | Yes, 0.3 Ohm |
| Event Classification | 2, 3, 4, and 6 event classification |
| Pair Identification | SUPP_Sx pins generate flags for powered cable pairs |
| Internal Bleeder | Yes, discharges downstream DC-DC input capacitor |
| Protection Features | Overcurrent protection, undervoltage protection, thermal protection |
| Status Indication | PGOOD output |
| PD Detection / Disconnect | Yes, detection and disconnect identification |
| 封裝 | 16-DFN (5x4 mm) |
| 安裝類型 | Surface Mount |
PD70210ILD-TR 16-dfn (5x4 mm) 腳位配置指南
PD70210ILD-TR（16-dfn (5x4 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： PD70210ILD-TR.
請參閱 資料表 以查看完整腳位配置。
典型應用
PD70210ILD-TR 適用於 6 應用s: IP Security Cameras, Wireless Access Points, HDBaseT Extenders and Transmitters, VoIP Phones and Conference Devices, Industrial Networked Equipment, Smart Building Sensors and LED Lighting over PoE.
IP Security Cameras
The PD70210ILD-TR is well suited to network cameras powered over Ethernet because it handles the complete IEEE 802.3af/802.3at PD interface in one small 16-DFN (5x4 mm) package. Its integrated 0.3 ohm pass FET removes the external MOSFET that would otherwise consume scarce PCB area in a camera barrel housing, and the PGOOD output lets the SoC supervise power sequencing of the image sensor and compression engine. The 2/3/4/6 event classification block allows the camera to negotiate up to PoE+ (802.3at, class 4) power levels for IR illuminators and motorized zoom lenses, while the internal bleeder guarantees fast re-detection when a cable is re-plugged, minimizing camera downtime. Overcurrent, undervoltage, and thermal protection protect the front end under fault conditions on long cable runs.
推薦
Wireless Access Points
Enterprise Wi-Fi access points typically draw 15 W to 30 W, requiring IEEE 802.3at class 4 or 4-pair power. The PD70210ILD-TR supports 2-pair 802.3at and general 4-pair configurations, and its SUPP_Sx pins identify which cable pairs actually receive power so the system firmware can adapt power budgeting accordingly. The 6-event classification capability aligns with the power negotiation behavior expected in high-power PD front ends, while the internal bleeder ensures fast re-detection and port power-up when switches or cabling are serviced. The 0.3 ohm internal FET limits front-end conduction loss, an important thermal consideration inside sealed outdoor AP enclosures, and the PGOOD flag enables clean sequencing between the PoE interface and the point-of-load DC-DC converters feeding the radio chain.
推薦
HDBaseT Extenders and Transmitters
HDBaseT links carry video, audio, control, and up to Power over HDBaseT (PoH) over a single Cat5e/6 cable, commonly using 4-pair power at levels beyond standard 802.3at. The PD70210ILD-TR explicitly supports HDBaseT and general 4-pair configurations, per the Microchip product page, and its advanced classification block implements the 2, 3, 4, and 6 event classification sequences needed to negotiate PoH power from compatible PSEs. The SUPP_Sx flags report pair status for system diagnostics. Its internal bleeder rapidly discharges the downstream converter input capacitor, allowing immediate re-detection when the RJ45 is re-inserted after a wall-plate service, a common event in conference-room AV installations. The compact 16-DFN footprint fits wall-plate and puck-form-factor transmitter boards.
推薦
VoIP Phones and Conference Devices
VoIP desk phones are classic IEEE 802.3af class 2 or class 3 powered devices, and the PD70210ILD-TR implements full 802.3af detection and classification signatures with headroom for 802.3at when devices add color displays and speakers. The integrated 0.3 ohm FET minimizes voltage drop across the PD front end, preserving margin for the phone's DC-DC converter on long cable runs where PSE voltage at the far end can fall to 37 V. Disconnect identification and the internal discharge bleeder give clean, fast power cycling when the phone is moved between desks. Overcurrent and thermal protection protect against shorts in handset cabling, while PGOOD allows the main processor to gate its boot sequence, preventing brown-out glitches during PoE handshaking and inrush.
推薦
Industrial Networked Equipment
Industrial IoT nodes, controllers, and sensors increasingly accept PoE to avoid dedicated power wiring, and the PD70210ILD-TR's general 2-pair or 4-pair support lets one hardware platform serve both standard PoE switches and legacy midspan installations. Its overcurrent, undervoltage, and thermal protection set addresses the robustness demands of factory-floor electrical environments, while the 16-DFN (5x4 mm) surface-mount package suits DIN-rail and embedded module form factors. The 6-event classification block interoperates with modern managed PSEs that perform LLDP-based power negotiation, and the SUPP_Sx pair-identification flags support field diagnostics of damaged or miswired cabling. The internal 0.3 ohm FET's low conduction loss improves efficiency at continuous industrial load profiles, reducing heat inside sealed enclosures.
推薦
Smart Building Sensors and LED Lighting over PoE
PoE lighting fixtures and smart-building sensor nodes benefit from the PD70210ILD-TR's low component count: integrated detection, classification, inrush control, and the 0.3 ohm pass FET in a single 16-DFN package shrink the power front end on compact luminaire driver boards. Support for 802.3at class 4 allows multi-channel LED fixtures, and the PGOOD output coordinates LED driver enable with PoE availability, avoiding flicker during re-negotiation. The internal bleeder's fast re-detection is valuable in lighting systems where switches or PSE ports are frequently cycled during commissioning. Thermal and overcurrent protection provide a safety layer when fixtures are enclosed in ceiling housings, and 4-pair support with SUPP_Sx flags enables compatibility with emerging multi-port PoE lighting infrastructures.
推薦
推薦產品摘要
工程參考資料，適用於 PD70210ILD-TR — 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 | PD70210AILD-TR | PD70210ALILD |
|---|---|---|---|
| Package | 16-DFN (5x4 mm) | 16-DFN (5x4 mm) - same | 16-DFN (5x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Standards Supported | 802.3af / 802.3at / HDBaseT / PoH | 802.3af / 802.3at / HDBaseT / PoH | 802.3af / 802.3at / HDBaseT / PoH |
| Internal Pass FET | Yes, 0.3 Ohm | Yes, 0.3 Ohm | Yes, 0.3 Ohm |
| Event Classification | 2 / 3 / 4 / 6 events | 2 / 3 / 4 / 6 events | 2 / 3 / 4 / 6 events |
| Protection Set | OCP / UVP / thermal / PGOOD | OCP / UVP / thermal / PGOOD | OCP / UVP / thermal / PGOOD |
| Internal Bleeder | Yes | Yes | Yes |
主要差異化特點
- Integrated 0.3 Ohm pass FET eliminates external MOSFET (對比PD70210AILD-TR)
- Full PoH / HDBaseT support with pair identification (對比PD70210AILD-TR)
- Internal bleeder for fast re-detection (對比PD70210AILD-TR)
設計說明
The downstream DC-DC converter input capacitor must be sized to meet IEEE 802.3af/802.3at inrush timing windows while remaining compatible with the PD70210ILD-TR's internal bleeder. Oversized input capacitance lengthens the discharge interval after cable removal, slowing re-detection even with the internal bleeder active; undersized capacitance can cause the PD to drop classification under load transients. Follow the application circuit in the Microchip PD70210/PD70210A/PD70210AL datasheet (DS00003695B) for recommended values, and verify the class resistor settings against the converter's maximum power draw.
The internal 0.3 ohm pass FET dissipates I^2 x R during normal operation. Estimated: at a 0.5 A continuous PD input current, conduction loss is 0.25 x 0.3 = 75 mW, which is easily handled by the 16-DFN (5x4 mm) exposed-pad footprint; at multi-hundred-milliamp 802.3at class 4 loads, verify that the PCB copper pour under the DFN pad achieves adequate theta_JA per the datasheet thermal data. Use a solid ground plane and multiple thermal vias on the exposed pad rather than relying on trace-only connection.
Do not omit the SUPP_Sx connections even in 2-pair-only designs - the pins generate the pair-identification flags and floating them can produce undefined status in 4-pair/PoH systems. Ensure PGOOD is polled or wired to a supervisor so the SoC does not boot before the PoE rail is stable. Also confirm which family grade (PD70210, PD70210A, PD70210AL) is ordered: the datasheet covers all three, and substitution should be verified against the specific electrical-characteristics table before a drop-in swap.
合規資訊
Compliance status was not stated in the verified web data; consult the Microchip product page or the DS00003695B datasheet documentation for RoHS/REACH declarations.
