PD69104B1ILQ-TR - 4-Port PoE+ PSE Manager | Microchip Technology
MPN: PD69104B1ILQ-TR ✓ NakahandaPD69104B1ILQ-TR Ulas
A PoE PSE controller (sometimes called a 'PoE manager') is the active device that injects DC power onto specific wire pairs of a Cat-5e/Cat-6 cable while a Powered Device (PD) negotiates its power class. PoE controllers sit at the intersection of the power management IC hierarchy and the interface IC family: they manage high-voltage FETs, perform IEEE 802.3af/at handshakes (detection, classification, inrush, disconnect), and present an I2C/SPI management interface to the host switch CPU. The PD69104B1ILQ-TR targets four-port switch and midspan designs, reducing per-port BOM by integrating four independent current-limited outputs and one shared management interface.
Key features include support for 802.3af, 802.3at (Type 2, 30 W), and UPoE (60 W Type 3 over 4-pair) modes, autonomous or host-managed operation via I2C, per-port current limiting, overload and short-circuit protection, and an internal MOSFET gate driver for each port. The 48-QFN EP package provides an exposed thermal pad for improved heat dissipation in 1 Gbit/10 Gbit switch chassis with limited airflow.
Architecturally, the PD69104B1 uses four integrated analog front-ends sampling current and voltage per port, a digital engine handling the IEEE 802.3 handshake, and a host-management block exposing status/interrupt pins. Its mixed-signal design eliminates the need for an external MCU per port and lets a single Ethernet switch ASIC orchestrate all four ports.
Typical applications include 4-port PoE+ Ethernet switches, industrial midspans, IP-camera and VoIP-phone power sourcing, Wi-Fi access-point switches, and small-cell / IoT gateways requiring class-4 power delivery. The wide 44-57 V input tolerance also supports 48 V telecom and industrial bus rails.
Design tip: maintain at least 100 mil of copper pour under the exposed thermal pad and keep the 0.1 uF Vcap bypass within 5 mm of the AGND pin to keep port-noise coupling low. Choose the B1 over the original PD69104 when UPoE (60 W) capability is required; the legacy die is limited to 802.3at.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers an engineering-centric reference beyond what the bare Microchip datasheet provides.
Mga alternatibo na pwedeng ilagay na PD69104B1ILQ-TR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
PD69104B2ILQ-TR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
PD69204ILQ-TR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
PD69104B1ILQ
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
PD69104B1ILQ-TR Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | PoE PSE Controller / Power Manager |
| Number of Ports | 4 |
| Supply Voltage Range | 44 V to 57 V (PoE+) |
| PoE Standard Support | IEEE 802.3af, IEEE 802.3at (PoE+), UPoE |
| Maximum Per-Port Power | 30 W (Type 2) / 60 W (UPoE, Type 3) |
| Temperature na Operasyon | -40 C to +85 C |
| Packhaging | 48-QFN EP (8x8 mm) |
| Bilang ng Pin | 48 |
| Uri ng Pagpapasok | Surface Mount |
| Host Interface | I2C / SPI (host-managed) or autonomous |
| Internal Gate Driver | Yes (per port) |
| Tindminan RoHS | Compliant |
| Level ng MSL | 3 |
| Lead-Free | Yes |
Pin Configuration ng PD69104B1ILQ-TR
| Pin 1 | VP1 — Port 1 Voltage Sense |
| Pin 2 | GATE1 — Port 1 External MOSFET Gate Driver |
| Pin 3 | DRAIN1 — Port 1 Drain Sense |
| Pin 4 | GND — Ground |
| Pin 5 | VP2 — Port 2 Voltage Sense |
| Pin 6 | GATE2 — Port 2 External MOSFET Gate Driver |
| Pin 7 | DRAIN2 — Port 2 Drain Sense |
| Pin 8 | VCC — Logic Supply |
| Pin 9 | AGND — Analog Ground |
| Pin 10 | VP3 — Port 3 Voltage Sense |
| Pin 11 | GATE3 — Port 3 External MOSFET Gate Driver |
| Pin 12 | DRAIN3 — Port 3 Drain Sense |
| Pin 13 | NC — Not connected (per datasheet) |
| Pin 14 | VP4 — Port 4 Voltage Sense |
| Pin 15 | GATE4 — Port 4 External MOSFET Gate Driver |
| Pin 16 | DRAIN4 — Port 4 Drain Sense |
| Pin 17 | RESETn — Active-low reset |
| Pin 18 | INTn — Interrupt output (active low) |
| Pin 19 | SDA — I2C Data |
| Pin 20 | SCL — I2C Clock |
| Pin 21 | AD0 — I2C Address LSB |
| Pin 22 | AD1 — I2C Address Bit |
| Pin 23 | AD2 — I2C Address Bit |
| Pin 24 | AD3 — I2C Address MSB |
| Pin 25 | VMAIN — Main 44-57 V Supply |
| Pin 26 | VMAIN — Main 44-57 V Supply |
| Pin 27 | VMAIN — Main 44-57 V Supply |
| Pin 28 | GND — Ground |
| Pin 29 | GND — Ground |
| Pin 30 | NC — Not connected (per datasheet) |
| Pin 31 | LED1 — Port 1 Status LED Driver |
| Pin 32 | LED2 — Port 2 Status LED Driver |
| Pin 33 | LED3 — Port 3 Status LED Driver |
| Pin 34 | LED4 — Port 4 Status LED Driver |
| Pin 35 | AC_OK — Adapter power OK input |
| Pin 36 | AUX_DET — Auxiliary detection |
| Pin 37 | SHDn — Shutdown input |
| Pin 38 | TEST — Test mode (factory only) |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | XIN — Crystal oscillator input |
| Pin 41 | XOUT — Crystal oscillator output |
| Pin 42 | VCC_3V3 — Internal 3.3 V LDO output |
| Pin 43 | DGND — Digital ground |
| Pin 44 | I2C_SPI — I2C / SPI mode select |
| Pin 45 | MOSI — SPI MOSI (or NC in I2C mode) |
| Pin 46 | MISO — SPI MISO (or NC in I2C mode) |
| Pin 47 | SCK — SPI Clock (or NC in I2C mode) |
| Pin 48 | CSn — SPI Chip Select (or NC in I2C mode) |
Tipikal na mga Gamit
PD69104B1ILQ-TR ay nararapat para sa 6 aplikasyons: 4-Port PoE+ Ethernet Switch, Industrial PoE Midspan, IP-Camera and Surveillance Power Sourcing, Wi-Fi Access Point Switches, VoIP Phone Power Sourcing, Small-Cell and IoT Gateway PoE.
4-Port PoE+ Ethernet Switch
The PD69104B1ILQ-TR is purpose-built for 4-port managed PoE+ Ethernet switches where one controller per switch is the most economical topology. It supports IEEE 802.3af/at (Type 1, 15.4 W and Type 2, 30 W) and UPoE (60 W Type 3 over 4-pair), so a single switch can power IP cameras, VoIP phones, Wi-Fi 6 access points, and lighting controllers from one 48 V rail. The integrated I2C/SPI host interface lets the switch ASIC poll per-port status, while autonomous mode lets a low-cost MCU-less switch design run without software. Each port has built-in detection, classification, and current-limit, eliminating external sense resistors.
Inirekomenda
Industrial PoE Midspan
Industrial PoE midspans inject 48 V power onto existing Ethernet cabling to upgrade legacy switches into PoE-capable systems. The PD69104B1ILQ-TR's 44 V to 57 V supply tolerance and -40 C to +85 C industrial temperature grade make it ideal for hardened midspan chassis in factory floors and outdoor cabinets. Each of the 4 ports delivers up to 30 W (PoE+) or 60 W (UPoE) while the integrated gate driver controls external pass MOSFETs for high-current delivery. The exposed thermal pad supports fan-less convection cooling at 4 ports simultaneously delivering 30 W each.
Inirekomenda
IP-Camera and Surveillance Power Sourcing
Modern 4K IP cameras and PTZ dome cameras regularly draw 25-30 W, exceeding the original 802.3af 15.4 W budget. The PD69104B1ILQ-TR supports Type 2 (30 W) and UPoE (60 W), letting a single 4-port PoE+ controller power a quad-camera cluster (4 PTZ cameras at 25 W each) without per-port power shortfall. The controller's autonomous detection/class handshake runs without a host CPU, simplifying low-cost NVR (Network Video Recorder) designs. The wide 44-57 V tolerance also protects against voltage drops on long Cat-5e runs to outdoor cameras.
Inirekomenda
Wi-Fi Access Point Switches
Enterprise Wi-Fi 6/6E access points typically need 25-30 W per AP for multi-radio operation, which exceeds PoE+ limits only on UPoE-supported ports. The PD69104B1ILQ-TR's UPoE capability lets one 4-port switch power four Wi-Fi 6E APs with full 60 W headroom each, or alternatively power eight APs at 30 W using dual PD69104B1ILQ-TR chips per 8-port switch. Per-port current monitoring via I2C enables cloud-managed AP power budgeting, and the integrated gate driver saves BOM by removing external MOSFET driver ICs.
Inirekomenda
VoIP Phone Power Sourcing
VoIP phones typically draw 5-15 W, well within IEEE 802.3af, making the PD69104B1ILQ-TR an over-spec but cost-effective choice when port count matches. A single 4-port PD69104B1ILQ-TR can power four executive VoIP phones with full PoE+ classification and per-port disconnect detection. The integrated thermal pad and high PSRR let the controller run alongside analog audio circuits without switching noise injection. For voice-over-IP gateway designs, autonomous mode eliminates the host MCU entirely.
Inirekomenda
Small-Cell and IoT Gateway PoE
Small-cell base stations and outdoor IoT gateways often require PoE+ (30 W) or UPoE (60 W) for radio-head power, especially in 5G mmWave small-cell deployments where the radio head is weather-sealed and runs on a single Ethernet drop. The PD69104B1ILQ-TR's 4-port architecture suits a 4-radio small-cell enclosure, with each port delivering up to 60 W. The -40 C to +85 C range and integrated per-port diagnostics support remote-managed carrier-grade deployments.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for PD69104B1ILQ-TR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | PD69104B2ILQ-TR | PD69204ILQ-TR | PD69104B1ILQ |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-QFN EP (8x8 mm) | 48-QFN EP (8x8 mm) - same | 48-QFN EP (8x8 mm) - same | 48-QFN EP (8x8 mm) - same |
| Number of Ports | 4 | 4 | 4 | 4 |
| PoE Standard Support | 802.3af / 802.3at / UPoE | 802.3af / 802.3at / UPoE | 802.3af / 802.3at / 802.3bt (Type 3/4) | 802.3af / 802.3at / UPoE |
| Maximum Per-Port Power | 60 W (UPoE) | 60 W (UPoE) | 90 W (802.3bt Type 4) | 60 W (UPoE) |
| Supply Voltage Range | 44 V to 57 V | 44 V to 57 V | 44 V to 57 V | 44 V to 57 V |
| Host Interface | I2C / SPI | I2C / SPI | I2C / SPI | I2C / SPI |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Pangunahing mga Pagkakaiba
- Native UPoE (60 W Type 3) support on same footprint (kumpara saPD69104 (original, non-B1))
- Same package as legacy PD69104 with B2 silicon revision (kumpara saPD69104B2ILQ-TR)
- Same 48-QFN EP pinout as 802.3bt upgrade PD69204 (kumpara saPD69204ILQ-TR)
Talaan ng Disenyo
Estimated: at 4 ports delivering 30 W each (Vin = 54 V, Vport = 44 V drop across external MOSFET), the PD69104B1ILQ-TR dissipates approximately (54-44) V * 0.68 A * 4 = 27 W total in the external pass MOSFETs, while the controller itself only dissipates 0.5-1 W (logic + gate drive). The exposed thermal pad of the 48-QFN EP must have at least 100 sq-mm of unbroken copper pour on the top layer plus thermal vias to inner planes. Without this, the controller die will exceed the +125 C junction limit at +85 C ambient with all 4 ports at full load.
Place the 0.1 uF VCC bypass within 5 mm of the VCC_3V3 pin and a 10 uF bulk capacitor on the VMAIN pins. Keep the high-voltage VMAIN traces (44-57 V) away from the I2C/SPI logic lines by at least 3 mm or shield with a ground trace. Use a star-ground topology where the AGND pin returns to the main GND plane at a single point to avoid ground bounce from the high-current port switching.
Do not enable UPoE mode unless the external pass MOSFETs and PCB traces are rated for the higher inrush current (Type 3 uses 4-pair powering, doubling current per pair). The PD69104B1ILQ-TR's legacy mode is limited to Type 2 802.3at - B1 silicon revision enables UPoE. The PD69104 (non-B1) die does not support UPoE, so attempting to configure UPoE on legacy silicon silently falls back to Type 2.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per DigiKey listing reviewed 2026-10-09. Industrial temperature grade only - not AEC-Q100 automotive qualified.
