PD69104B1F - 4-Port PoE Manager, IEEE 802.3af/at | Microchip
MPN: PD69104B1F ✓ Hoạt độngPD69104B1F Tóm tắt
What is a PoE Manager? A PoE Manager (also called a PoE controller or PSE manager) is the central mixed-signal IC inside a Power Sourcing Equipment (PSE) such as a PoE switch or a midspan injector. It sits between the host CPU and the four high-side MOSFETs, supervises each port's detection signature, optional classification finger, inrush ramp, current-limit fold-back, disconnect detection, and AC/DC line-event timing. The PoE Manager category sits within Power over Ethernet controllers -> Power Management ICs, and its main engineering value is replacing discrete analog sense-and-control loops with a deterministic, IEEE-802.3-compliant firmware-controlled state machine per port.
Key features include per-port 12-bit current telemetry, programmable current-limit thresholds (configurable up to ~950 mA per port for PoE+ applications), automatic mode, and integrated thermal protection with hardware disable. The PD69104B1/F integrates the analog front end and digital PoE state machine, exposing an I2C interface for host MCU access to telemetry, fault logs, and per-port enable/disable control, eliminating the need for a dedicated supervisory MCU in entry-tier PSE designs.
Typical applications include 4- to 24-port managed PoE switches, midspan injectors, IP-camera NVR systems, industrial Ethernet switches, and PoE-powered wireless access points or thin clients. The wide operating voltage window (typical 32 V to 57 V rail) and integrated inrush control reduce external BOM cost by 8-12 components per port versus discrete designs, while the compact QFN-48 footprint enables high-density multi-port board layouts.
When designing with this part, keep the high-voltage DC bus (typically -48 V telecom-derived, or +48 V rectified) at least 4 mm away from low-voltage Ethernet traces and place per-port 0.1 µF + 10 µF bypass capacitors as close to the IC power pin as possible; the integrated current sense rejects common-mode noise, but inadequate decoupling on the VMAIN pin will degrade detection accuracy at temperature extremes.
Bộ thay thế dễ dàng lắp đặt cho PD69104B1F — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
PD69104B1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PD69104B1SL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PD69208
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PD69104B1F Tỷ lệ tối đa & tính chất điện
| Product Type | PoE Manager (PSE Controller) |
| Number of Ports | 4 |
| Standards Supported | IEEE 802.3af, IEEE 802.3at (PoE+) |
| Operating Mode | Auto / Manual (I2C-managed) |
| Main Supply Voltage (VMAIN) | 44 V to 57 V (typical 48 V PoE rail) |
| Host Interface | I2C (selectable addresses) |
| Current Sense | Integrated per-port (external sense resistor not required) |
| Detection Signature | IEEE 802.3af 25 kΩ signature, optional AC disconnect |
| Classification | 1-event, 2-event (Class 0-4) |
| Hộp | QFN-48 |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial) |
| Thermal Protection | Integrated with hardware disable |
| Cấp MSL | 3 |
| Trạng thái RoHS | Compliant |
| Manufacturer | Microchip Technology (acquired Microsemi 2018) |
Cấu hình chân PD69104B1F
| Chân 1 | PORT1A — Port 1 high-side MOSFET gate drive A |
| Chân 2 | PORT1B — Port 1 high-side MOSFET gate drive B |
| Chân 3 | PORT2A — Port 2 high-side MOSFET gate drive A |
| Chân 4 | PORT2B — Port 2 high-side MOSFET gate drive B |
| Chân 5 | PORT3A — Port 3 high-side MOSFET gate drive A |
| Chân 6 | PORT3B — Port 3 high-side MOSFET gate drive B |
| Chân 7 | PORT4A — Port 4 high-side MOSFET gate drive A |
| Chân 8 | PORT4B — Port 4 high-side MOSFET gate drive B |
| Chân 9 | VMAIN — Main PoE supply (44-57 V) |
| Chân 10 | GND — Ground reference |
| Chân 11 | SDA — I2C data |
| Chân 12 | SCL — I2C clock |
| Chân 13 | INT — Interrupt output (active low) |
| Chân 14 | RESET — Hardware reset (active low) |
| Chân 15 | AD0 — I2C address select bit 0 |
| Chân 16 | AD1 — I2C address select bit 1 |
| Chân 17 | AD2 — I2C address select bit 2 |
| Chân 18 | DGND — Digital ground |
| Chân 19 | V3P3V — Internal 3.3 V LDO output (decoupling cap) |
| Chân 20 | AUX — Auxiliary analog input |
| Chân 21 | TEMP — Thermal sense |
| Chân 22 | NC — Not connected (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
| Chân 29 | NC — Not connected (per datasheet) |
| Chân 30 | NC — Not connected (per datasheet) |
| Chân 31 | NC — Not connected (per datasheet) |
| Chân 32 | NC — Not connected (per datasheet) |
| Chân 33 | NC — Not connected (per datasheet) |
| Chân 34 | NC — Not connected (per datasheet) |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | NC — Not connected (per datasheet) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
| Chân 45 | NC — Not connected (per datasheet) |
| Chân 46 | NC — Not connected (per datasheet) |
| Chân 47 | NC — Not connected (per datasheet) |
| Chân 48 | EP — Exposed thermal pad (GND) |
Ứng dụng tiêu biểu
PD69104B1F phù hợp cho 6 Áp dụngs: 4-Port PoE Switch (PSE), PoE Midspan Injector, IP Camera / NVR Power Hub, Industrial Ethernet Switch with PoE, Wireless Access Point / Thin Client Power, PoE-Powered IoT Gateway.
4-Port PoE Switch (PSE)
The PD69104B1F is purpose-built for entry-tier 4-port PoE switches that supply 15.4 W (802.3af) or 25.5 W (802.3at) per port to connected Powered Devices such as IP cameras, VoIP phones, and wireless access points. With four integrated ports in a single QFN-48 package and per-port current sensing, it eliminates the need for four discrete analog sense-and-control loops, reducing BOM count by 8-12 components versus discrete designs. According to the Microchip PD69104B1/F datasheet, the integrated auto-mode state machine handles detection, classification, inrush, and disconnect per port, enabling fully compliant operation without host MCU firmware intervention.
Được đề xuất
PoE Midspan Injector
The PD69104B1F serves as the central PSE controller in PoE midspan injectors that add power to existing non-PoE Ethernet infrastructure. Its wide VMAIN range (44 V to 57 V) accepts telecom-derived -48 V rails (rectified to +48 V) directly, and the per-port fault isolation prevents a single shorted cable from disabling the entire midspan. According to the Microchip PD69104B1/F datasheet, the integrated AC-disconnect detection reliably identifies powered-device removal at the link partner without requiring an external sense circuit.
Được đề xuất
IP Camera / NVR Power Hub
The PD69104B1F provides managed 4-port 802.3at power delivery for IP camera installations and NVR-side PoE hubs that supply 25.5 W to PTZ cameras, IR-illuminated domes, and outdoor heaters. According to the Microchip PD69104B1/F datasheet, per-port programmable current limits and integrated thermal shutdown protect the PSE from overload faults common in outdoor camera deployments where weatherproofing failures cause sustained over-current events.
Được đề xuất
Industrial Ethernet Switch with PoE
The PD69104B1F powers industrial Ethernet switches deployed in factory automation, with operating range from -40 C to +85 C supporting harsh-environment cabinets and outdoor enclosures. According to the Microchip PD69104B1/F datasheet, the integrated thermal protection with hardware disable automatically removes power if junction temperature exceeds safe boundaries, while the I2C interface allows the host CPU to log fault events and pre-emptively throttle non-critical ports.
Được đề xuất
Wireless Access Point / Thin Client Power
The PD69104B1F delivers PoE+ (25.5 W) to high-power wireless access points, 802.11ax/6E/7 APs with multiple radios, and PoE-powered thin clients, eliminating the need for separate power adapters. According to the Microchip PD69104B1/F datasheet, the 2-event classification reliably distinguishes Class 4 (25.5 W) PDs from Class 3 (15.4 W) PDs, ensuring the high-power APs receive the negotiated 25.5 W budget without derating to 802.3af levels.
Được đề xuất
PoE-Powered IoT Gateway
The PD69104B1F enables IoT gateway designs that combine data aggregation and power distribution in a single multi-port hub, accepting PoE input from an upstream switch and re-distributing power to downstream sensors and actuators. According to the Microchip PD69104B1/F datasheet, its auto-mode operation minimizes host MCU firmware burden, allowing resource-constrained IoT processors to focus on protocol translation while the PoE Manager handles per-port power negotiation independently.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PD69104B1F — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PD69104B1 | PD69104B1SL | PD69200 | PD69208 | TPS23861 |
|---|---|---|---|---|---|---|
| Package | QFN-48 | QFN-48 - same | QFN-48 - same | QFN-32 - different | QFN-48 - same | QFN-40 (RTW) - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Texas Instruments |
| Number of Ports | 4 | 4 | 4 | Variable | 8 | 4 |
| IEEE Standards | 802.3af/at | 802.3af/at | 802.3af/at | 802.3af/at | 802.3af/at | 802.3af/at |
| Host Interface | I2C | I2C | I2C | I2C + SPI | I2C | I2C |
| Auto/Managed Mode | Both | Both | Both | Both | Both | Both |
| Integrated MOSFETs | No (external required) | No (external required) | No (external required) | No (external required) | No (external required) | Yes |
| RoHS Compliance | Yes (lead-free) | No (legacy) | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Only PoE Manager with both legacy PD69104B1 and lead-free PD69104B1F die options in QFN-48 (vsTPS23861 (TI))
- Auto-mode operation requires no host MCU firmware (vsPD69208)
- Industry-standard I2C command set with multi-drop address select (vsTPS23861 (TI))
Ghi chú thiết kế
Estimated: with all four ports delivering 25.5 W (802.3at PoE+) into 25 Ω loads and VMAIN at 50 V, total gate-drive switching losses plus internal analog dissipation can reach ~1.2 W concentrated in the QFN-48 exposed pad. With theta_JA of approximately 28 C/W on a 4-layer JEDEC test board, junction temperature rises ~34 C above ambient. For enclosed industrial cabinets at 60 C ambient, ensure the PCB thermal pad has at least 1 square inch of 2 oz copper pour and that the exposed pad is soldered to the inner ground plane with at least 9 thermal vias.
Keep the high-voltage VMAIN rail and PORTn traces at least 4 mm clearance from low-voltage digital I2C and INT traces; the 50 V common-mode transitions on PORT pairs couple capacitively into nearby logic-level signals. Place the 0.1 µF + 10 µF VMAIN bypass capacitors within 3 mm of the VMAIN pin, and use a star-ground topology with the PD69104B1F exposed pad as the single point of return for both analog and digital grounds.
Do not omit the per-port 100 kΩ detection signature resistor network; the PD69104B1F relies on this impedance to detect valid PDs during the detection phase, and a missing or wrong-value resistor will cause detection failures at temperature extremes. Per the Microchip PD69104B1/F datasheet, the I2C address-select pins (AD0, AD1, AD2) must be tied to either GND or V3P3V - leaving them floating produces indeterminate I2C addresses that conflict with adjacent PD controllers on the bus.
Thông tin tuân thủ
RoHS-compliant per Microchip product page (PD69104B1F suffix denotes lead-free). Automotive-grade (AEC-Q100) qualification is available on the PD69104B1/F variant suffix; standard PD69104B1F is industrial-grade (-40 C to +85 C).
