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Overview
| Topology | LAN / POE |
| Input voltage | 48-75 V |
| Output 1 | 12 V / 8 A |
| IC revision | 1 |
Description
The PM8805 is a system-in-package for smart power supply of Power over Ethernet (PoE) Powered Devices (PD) and it is applicable for power level up to 99.9 W.It embeds: two active bridges and their driving circuitry, a charge pump to drive the high-side MOSFETs, the hot swap MOSFET and the interface compliant with IEEE 802.3bt.The device performs the physical layer classification, providing the indication of successful PSE type identification. A 4-pair PSE is identified and the information is available by a dedicated matrix of Tx signals.The device works with power either from the Ethernet cable or from an external power source such as a wall adapter, with possible prevalence of the auxiliary source with respect to the PoE.The PM8805 is suitable to build the interface section of PoE switch mode power supplies targeting the highest conversion efficiency. It provides a PGD signal that can be used to enable a PWM controller, a DC-DC converter or an LED driver.
Features
- Dual active bridge, hot swap MOSFETand PoE-PD interface in a system-in-package
- 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge.
- 100 V, 0.1 Ω high-side N-ch hot swap MOSFET
- PoE-PD single-signature interface compliant with IEEE 802.3bt / at / af
- Supports 4-pair PoE applications
- Supports 12 V auxiliary sources
- Identifies which kind of PSE (standard or legacy) is connected with and provides successful IEEE802.3bt / at / af classification indication as a combination of the T0, T1 and T2 signals (open drain)
- Smart operational modes
- Programmable classification current with 3.3 ms delay.
- Optional Autoclass feature
- Advanced energy-saving MPS timings
- Two-step hot swap current protection: DC with 1 ms delay and short-circuit with 10 us delay.
- Controlled pre-charge of the output capacitor
- PGD signal (open drain) to enable an external PWM controller.
- Thermal shutdown protection
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | C | Tol. C | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Q (%) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC max. (mΩ) | Number of windings | L1 (µH) | Zmax (Ω) | VR (V (DC)) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 885012007057 | SPEC | 8 files | WCAP-CSGP MLCCs 50 V(DC) | 100 pF | ±5% | 0805 | – | – | 10 GΩ | NP0 Class I | 2 | 1.25 | 0.6 | 0.5 | 7" Tape & Reel | 1000 | – | – | – | – | – | – | – | – | – | – | 50 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012006040 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 220 pF | ±5% | 0603 | – | – | 10 GΩ | NP0 Class I | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | 1000 | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206059 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 1 nF | ±10% | 0603 | – | 3.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012207116 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 1 nF | ±10% | 0805 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
 | 885342207008 | SPEC | 7 files | WCAP-CSMH Mid and High Voltage | 1 nF | ±10% | 0805 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 0.8 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 250 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206109 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 1.5 nF | ±10% | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206065 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 10 nF | ±10% | 0603 | – | 3.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206114 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 10 nF | ±10% | 0603 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885342207010 | SPEC | 7 files | WCAP-CSMH Mid and High Voltage | 10 nF | ±10% | 0805 | -55 °C up to +125 °C | 2.5 | 10 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 250 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206067 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 22 nF | ±10% | 0603 | – | 3.5 | 10 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012207125 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 33 nF | ±10% | 0805 | -55 °C up to +125 °C | 2.5 | 3 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012206071 | SPEC | 8 files | WCAP-CSGP MLCCs 25 V(DC) | 100 nF | ±10% | 0603 | -55 °C up to +125 °C | 3.5 | 5 GΩ | X7R Class II | 1.6 | 0.8 | 0.8 | 0.4 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 25 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012207128 | SPEC | 6 files | WCAP-CSGP MLCCs 100 V(DC) | 100 nF | ±10% | 0805 | -55 °C up to +125 °C | 2.5 | 1 GΩ | X7R Class II | 2 | 1.25 | 1.25 | 0.5 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 100 | – | – | – | – | -55 °C up to +125 °C | – | – | – | ||
| 885012109011 | SPEC | 8 files | WCAP-CSGP MLCCs 16 V(DC) | 47 µF | ±20% | 1210 | – | 10 | 0.002 GΩ | X5R Class II | 3.2 | 2.5 | 2.5 | 0.75 | 7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | 16 | – | – | – | – | -55 °C up to +85 °C | – | – | – | ||
 | 744272471 | SPEC | 8 files | WE-SL5 SMT Common Mode Line Filter | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | 1750 | 80 | – | – | – | – | – | 1000 | – | – | ||
 | 744316560 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | – | – | 5040 | -40 °C up to +150 °C | – | – | – | 5.5 | 5.3 | 4 | – | – | – | 5.5 | 2.4 | 4.6 | 28.5 | 48 | Superflux | 31.35 | 15.5 | – | – | – | – | – | – | – | -40 °C up to +150 °C | – | SMT | 5.6 | ||
 | 7443631000 | SPEC | 8 files | WE-HCF SMT High Current Inductor | – | – | 2013 | – | – | – | – | 20.8 | 20.5 | 13.5 | – | – | – | 16.15 | 22 | 23 | 7.96 | – | MnZn | 8.76 | – | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | – | 10 | ||
 | 7490220123 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | WE-LAN LAN Transformer | – | – | – | -40 °C up to +85 °C | – | – | – | 18.04 | 14.7 | 9.05 | 13.97 | – | – | – | – | – | 500 | – | – | – | – | 180 | – | – | 1000 Base-T | 1 | 4PPoE (up to 1500 mA) | No | -40 °C up to +105 °C | 1500 | SMT | 180 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 885012007057 | SPEC | |
| 885012006040 | SPEC | |
| 885012206059 | SPEC | |
| 885012207116 | SPEC | |
| 885342207008 | SPEC | |
| 885012206109 | SPEC | |
| 885012206065 | SPEC | |
| 885012206114 | SPEC | |
| 885342207010 | SPEC | |
| 885012206067 | SPEC | |
| 885012207125 | SPEC | |
| 885012206071 | SPEC | |
| 885012207128 | SPEC | |
| 885012109011 | SPEC | |
| 744272471 | SPEC | |
| 744316560 | SPEC | |
| 7443631000 | SPEC | |
| 7490220123 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | C | Tol. C | Size | Operating Temperature | DF (%) | RISO | Ceramic Type | L (mm) | W (mm) | H (mm) | Fl (mm) | Packaging | Q (%) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | RDC max. (mΩ) | Number of windings | L1 (µH) | Zmax (Ω) | VR (V (DC)) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | Samples |
|---|