Power over Ethernet (PoE)

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Power over Ethernet (PoE) is a widely adopted technology used to transfer power and supply the powered device (PD) including wireless access points, VoIP phones and even LED bulbs over an RJ-45 cable also carrying data as described in the IEEE 802.3 standard and its evolutions including IEEE 802.3bt, IEEE 802.3at and IEEE 802.3af.

We provide a range of products providing a complete interface with all the functions required by the communication standard including detection and classification as well as protection features including under-voltage lockout (UVLO) and in-rush current limitation. In addition, these products can control Hot-swap power MOSFETs that can greatly simplify the development of IEEE 802.3 compliant solutions for powered devices (PD).

Power Over Ethernet ICs

N-channel STripFET

N-channel STripFET

Buck Regulators

PWM peak current mode controller for PoE and telecom systems

Buck Current Regulators for LED

Power Over Ethernet ICs

Part Number	Description
STEVAL-TSP004V2	5 V/4 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design	Quick view Key Features IEEE 802.3at compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 to 60 V_DC Output voltage: 5 V_DC ± 5% Output current: 4 A Peak-to-peak output ripple: < 30 mV Efficiency DC-DC full-load: > 92% Overall peak efficiency: > 89% Transient response ΔV_OUTPK-PK to 50% load step: < 170 mV ΔV in load line case: < 0.5% RoHs compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-TSP006V2	Power over Ethernet - PD converter with 3.3 V 3 A output, standard IEEE 802.3af compliant	Quick view Key Features IEEE 802.3af compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 Vdc to 60 Vdc, output voltage: 3.3 Vdc ± 5% Output current: 3 A Peak-to-peak output ripple: 30 mV Efficiency DC-DC full-load: > 83% Efficiency overall peak: > 80% Transient response ΔVout_pk-pk to 50% load step: < 400 mV_pp ΔV in load line case: < 0.5% Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-TSP005V2	Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant	Quick view Key Features IEEE 802.3af compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 Vdc to 60 Vdc output voltage: 5 Vdc ± 5% Output current: 2 A Peak-to-peak output ripple: 30 mV Efficiency DC-DC full-load: > 86% Efficiency overall peak: > 84% Transient response ΔVout_pk-pk to 50% load step: < 300m Vpp ΔV in load line case: < 0.5% Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-TSP003V2	Power over Ethernet - PD converter with 12 V 1 A output, standard IEEE 802.3af compliant	Quick view Key Features IEEE 802.3af compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 Vdc to 60 Vdc Output voltage: 12 Vdc ± 5% Output current: 1 A Peak-to-peak output ripple: 100 mV Efficiency DC-DC full-load: > 88% Efficiency overall peak: > 85% Transient response ΔVout_pk-pk to 50% load step: < 200 mVpp ΔV in load line case: < 0.5% Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-TSP009V2	3.3 V/6 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design	Quick view Key Features IEEE 802.3at compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 V_DC to 60 V_DC Output voltage: 3.35 V_DC ± 5% Output current: 6 A Peak-to-peak output ripple: < 25 mV Efficiency DC-DC full-load: > 90% Overall peak efficiency: > 87% Transient response ΔV_OUTPK-PK to 50% load step: < 250 mV ΔV in load line case: < 0.5% RoHs compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-POE001V1	Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design	Quick view Key Features System in package including a dual active bridge, a hot swap MOSFET and a PoE-PD interface Robust 100V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge Robust 100 V, 0.1 Ω high side N-ch hot swap MOSFET PoE-PD single-signature interface compliant with IEEE 802.3bt Detection and support of high power, 4-pair applications Identifies which kind of PSE (standard or legacy) it is connected with, and provides successful IEEE 802.3af/at/bt classification indication through combination of the T0, T1 and T2 signals (open drain) Programmable classification current with 3.3 ms delay Advanced energy-saving MPS timings Two step hot swap current protection: DC with 1 ms delay and overload with 10 µs delay Startup phase (pre-charge of the output capacitor), performed using an internally limited current source PGD signal (open drain) to enable an external PWM controller Thermal shutdown protection RoHS compliant WEEE compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-POE006V1	3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design	Quick view Key Features Features of the PM8805 PoE-PD interface: System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD Supports legacy high power, 4-pair applications 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE 802.3af/at/bt classification indication as a combination of the T0, T1 and T2 signals (open drain) Smart operation mode selection through the STBY, FAUX and RAUX control signals QFN 56 8x8mm package with 43 pins and 6 exposed pads Features of the PM8804 PWM controller: PWM peak current mode controller Input operating voltage up to 75 V Internal high voltage start up regulator with 20 mA capability Programmable fixed frequency up to 1 Mhz Soft startup with settable time Soft turn off (optionally disabled) Dual 1 A_PK , low side complementary gate drivers GATE2 can be turned off for reduced consumption 80% maximum duty cycle with internal slope compensation QFN 16 3x3mm package with exposed pad Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-POE005V1	12V/8A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design	Quick view Key Features Features of the PM8805 PoE-PD interface: System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD Supports legacy high power, 4-pair applications 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge Identifies which kind of PSE (standard or legacy) is connected to, and provides successful IEEE802.3 af /at /bt classification indication as combination of the T0, T1 and T2 signals (open drain) Smart operational mode selection through the STBY, FAUX and RAUX control signals QFN 56 8x8mm package with 43 pins and 6 exposed pads Features of the PM8804 PWM controller: PWM peak current mode controller Input operating voltage up to 75 V Internal high voltage start up regulator with 20 mA capability Programmable fixed frequency up to 1 Mhz Soft start up with adjustable time Soft turn off (optionally disabled) Dual 1 A_PK , low side complementary gate drivers GATE2 optionally turned off for reduced consumption 80% maximum duty cycle with internal slope compensation QFN 16 3x3mm package with exposed pad Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-POE003V1	5V/20A, active clamp forward converter, Power Over Ethernet (PoE) - IEEE 802.3bt compliant reference design	Quick view Key Features Features of PM8805 PoE-PD interface System in package integrating a double active bridge, hot-swap MOSFET and PoE-PD interface PoE-PD single-signature interface compliant with IEEE 802.3bt Detection and support of high power 4-pair applications 100 V N-Ch MOSFETs with 0.2 Ω total path resistance for each active bridge Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE802.3.af/at/bt classification indication through a combination of the T0, T1 and T2 signals (open drain) VFQFPN43 8x8 mm with 6 exposed pads Features of PM8804 PWM controller PWM peak current mode controller Input operating voltage up to 75 V Internal high voltage start up regulator with 20 mA capability Programmable fixed frequency up to 1 MHz Soft start up with settable time Soft turn off (optionally disabled) Dual 1Apk, low side complementary gate drivers GATE2 optionally turned off for reduced consumption 80% maximum duty cycle with internal slope compensation VFQFPN 3.0x3.0x1.0 16L 0.5 mm pitch WEEE compliant RoHS compliant Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber
STEVAL-POE002V1	5V/8A, synchronous flyback converter, Power over Ethernet (PoE) IEEE 802.3bt compliant reference design	Quick view Key Features PM8805 4-pair IEEE 802.3bt compliant PD interface Works with power supplied from Ethernet LAN cables or local auxiliary sources Line input voltage range: 40 to 60 V_DC Output stage managed by configurable PM8804 controller Output voltage: 5 V_DC ±2.5% Output current: 8 A Peak-to-peak output ripple: <50 mV DC-DC full load efficiency: >91% Overall full load efficiency: >90% Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV Switching frequency ≈ 280 KHz Show More Product Details Download databrief IMAGE FEATURED RESOURCES Schematics BOM Gerber

Part Number

STEVAL-TSP004V2

5 V/4 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design

Quick view

Key Features

IEEE 802.3at compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 to 60 V_DC
Output voltage: 5 V_DC ± 5%
Output current: 4 A
Peak-to-peak output ripple: < 30 mV
Efficiency DC-DC full-load: > 92%
Overall peak efficiency: > 89%
Transient response ΔV_OUTPK-PK to 50% load step: < 170 mV
ΔV in load line case: < 0.5%
RoHs compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-TSP006V2

Power over Ethernet - PD converter with 3.3 V 3 A output, standard IEEE 802.3af compliant

Quick view

Key Features

IEEE 802.3af compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 Vdc to 60 Vdc, output voltage: 3.3 Vdc ± 5%
Output current: 3 A
Peak-to-peak output ripple: 30 mV
Efficiency DC-DC full-load: > 83%
Efficiency overall peak: > 80%
Transient response ΔVout_pk-pk to 50% load step: < 400 mV_pp
ΔV in load line case: < 0.5%

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-TSP005V2

Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant

Quick view

Key Features

IEEE 802.3af compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 Vdc to 60 Vdc output voltage: 5 Vdc ± 5%
Output current: 2 A
Peak-to-peak output ripple: 30 mV
Efficiency DC-DC full-load: > 86%
Efficiency overall peak: > 84%
Transient response ΔVout_pk-pk to 50% load step: < 300m Vpp
ΔV in load line case: < 0.5%

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-TSP003V2

Power over Ethernet - PD converter with 12 V 1 A output, standard IEEE 802.3af compliant

Quick view

Key Features

IEEE 802.3af compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 Vdc to 60 Vdc Output voltage: 12 Vdc ± 5%
Output current: 1 A
Peak-to-peak output ripple: 100 mV
Efficiency DC-DC full-load: > 88%
Efficiency overall peak: > 85%
Transient response ΔVout_pk-pk to 50% load step: < 200 mVpp
ΔV in load line case: < 0.5%

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-TSP009V2

3.3 V/6 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design

Quick view

Key Features

IEEE 802.3at compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 V_DC to 60 V_DC
Output voltage: 3.35 V_DC ± 5%
Output current: 6 A
Peak-to-peak output ripple: < 25 mV
Efficiency DC-DC full-load: > 90%
Overall peak efficiency: > 87%
Transient response ΔV_OUTPK-PK to 50% load step: < 250 mV
ΔV in load line case: < 0.5%
RoHs compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-POE001V1

Power Over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design

Quick view

Key Features

System in package including a dual active bridge, a hot swap MOSFET and a PoE-PD interface
Robust 100V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
Robust 100 V, 0.1 Ω high side N-ch hot swap MOSFET
PoE-PD single-signature interface compliant with IEEE 802.3bt
Detection and support of high power, 4-pair applications
Identifies which kind of PSE (standard or legacy) it is connected with, and provides successful IEEE 802.3af/at/bt classification indication through combination of the T0, T1 and T2 signals (open drain)
Programmable classification current with 3.3 ms delay
Advanced energy-saving MPS timings
Two step hot swap current protection: DC with 1 ms delay and overload with 10 µs delay
Startup phase (pre-charge of the output capacitor), performed using an internally limited current source
PGD signal (open drain) to enable an external PWM controller
Thermal shutdown protection
RoHS compliant
WEEE compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-POE006V1

3.3V/20A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design

Quick view

Key Features

Features of the PM8805 PoE-PD interface:
- System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
- Supports legacy high power, 4-pair applications
- 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE 802.3af/at/bt classification indication as a combination of the T0, T1 and T2 signals (open drain)
- Smart operation mode selection through the STBY, FAUX and RAUX control signals
- QFN 56 8x8mm package with 43 pins and 6 exposed pads
Features of the PM8804 PWM controller:
- PWM peak current mode controller
- Input operating voltage up to 75 V
- Internal high voltage start up regulator with 20 mA capability
- Programmable fixed frequency up to 1 Mhz
- Soft startup with settable time
- Soft turn off (optionally disabled)
- Dual 1 A_PK , low side complementary gate drivers
- GATE2 can be turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3x3mm package with exposed pad

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-POE005V1

12V/8A, active clamp forward converter, Power Over Ethernet (PoE) IEEE 802.3bt compliant reference design

Quick view

Key Features

Features of the PM8805 PoE-PD interface:
- System in package integrating a double active bridge, a hot-swap MOSFET and a PoE-PD
- Supports legacy high power, 4-pair applications
- 100 V N-ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) is connected to, and provides successful IEEE802.3 af /at /bt classification indication as combination of the T0, T1 and T2 signals (open drain)
- Smart operational mode selection through the STBY, FAUX and RAUX control signals
- QFN 56 8x8mm package with 43 pins and 6 exposed pads
Features of the PM8804 PWM controller:
- PWM peak current mode controller
- Input operating voltage up to 75 V
- Internal high voltage start up regulator with 20 mA capability
- Programmable fixed frequency up to 1 Mhz
- Soft start up with adjustable time
- Soft turn off (optionally disabled)
- Dual 1 A_PK , low side complementary gate drivers
- GATE2 optionally turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- QFN 16 3x3mm package with exposed pad

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-POE003V1

5V/20A, active clamp forward converter, Power Over Ethernet (PoE) - IEEE 802.3bt compliant reference design

Quick view

Key Features

Features of PM8805 PoE-PD interface
- System in package integrating a double active bridge, hot-swap MOSFET and PoE-PD interface
- PoE-PD single-signature interface compliant with IEEE 802.3bt
- Detection and support of high power 4-pair applications
- 100 V N-Ch MOSFETs with 0.2 Ω total path resistance for each active bridge
- Identifies which kind of PSE (standard or legacy) it is connected to and provides successful IEEE802.3.af/at/bt classification indication through a combination of the T0, T1 and T2 signals (open drain)
- VFQFPN43 8x8 mm with 6 exposed pads
Features of PM8804 PWM controller
- PWM peak current mode controller
- Input operating voltage up to 75 V
- Internal high voltage start up regulator with 20 mA capability
- Programmable fixed frequency up to 1 MHz
- Soft start up with settable time
- Soft turn off (optionally disabled)
- Dual 1Apk, low side complementary gate drivers
- GATE2 optionally turned off for reduced consumption
- 80% maximum duty cycle with internal slope compensation
- VFQFPN 3.0x3.0x1.0 16L 0.5 mm pitch
WEEE compliant
RoHS compliant

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

STEVAL-POE002V1

5V/8A, synchronous flyback converter, Power over Ethernet (PoE) IEEE 802.3bt compliant reference design

Quick view

Key Features

PM8805 4-pair IEEE 802.3bt compliant PD interface
Works with power supplied from Ethernet LAN cables or local auxiliary sources
Line input voltage range: 40 to 60 V_DC
Output stage managed by configurable PM8804 controller
Output voltage: 5 V_DC ±2.5%
Output current: 8 A
Peak-to-peak output ripple: <50 mV
DC-DC full load efficiency: >91%
Overall full load efficiency: >90%
Transient response ΔV pk-pk 100% to 50% load step ≈ 700 mV
Switching frequency ≈ 280 KHz

Product Details Download databrief

IMAGE

FEATURED RESOURCES

Schematics BOM Gerber

00 Files selected for download

Technical Documentation

Application Notes

Description	Version	Size	Action
AN4006 Designing a high-efficiency (60 W on 4 pairs) PoE converter using the PM8803 and an external current booster	1.0	3.11 MB	PDF
AN4275 IEC 61000-4-5 standard overview	1.0	383.23 KB	PDF
AN3373 IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter	1.0	1.23 MB	PDF
AN2783 PM8800 demonstration kit for standard and high power PoE PD interface and power supply, with auxiliary sources	2.1	1.3 MB	PDF
AN4687 PoE synchronous flyback, IEEE802.3at compliant, 3.3 V - 6 A PD converter based on the PM8803 controller	1.0	2.46 MB	PDF
AN4473 PoE synchronous flyback, IEEE802.3at compliant, 5V - 4A PD converter based on the PM8803 controller	1.1	2.61 MB	PDF
AN4319 Power over Ethernet - PD converter with 12 V 1 A output, standard IEEE 802.3af compliant	1.0	1.84 MB	PDF
AN4377 Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant	1.0	1.76 MB	PDF
AN4415 Power over Ethernet-PD converter with 3.3 V, 3 A output, standard IEEE 802.3af compliant	1.0	5.57 MB	PDF

AN4006

Designing a high-efficiency (60 W on 4 pairs) PoE converter using the PM8803 and an external current booster

PDF

AN4275

IEC 61000-4-5 standard overview

PDF

AN3373

IEEE802.3at compliant PD + PS design based on PM8803 low power, synchronous flyback PoE converter

PDF

AN2783

PM8800 demonstration kit for standard and high power PoE PD interface and power supply, with auxiliary sources

PDF

AN4687

PoE synchronous flyback, IEEE802.3at compliant, 3.3 V - 6 A PD converter based on the PM8803 controller

PDF

AN4473

PoE synchronous flyback, IEEE802.3at compliant, 5V - 4A PD converter based on the PM8803 controller

PDF

AN4319

Power over Ethernet - PD converter with 12 V 1 A output, standard IEEE 802.3af compliant

PDF

AN4377

Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant

PDF

AN4415

Power over Ethernet-PD converter with 3.3 V, 3 A output, standard IEEE 802.3af compliant

PDF

Publications and Collaterals

Flyers

	Description	Version	Size	Action
	PM8803: Integrated PoE+ PD interface and PWM controller	3.1	216.44 KB	PDF

PM8803: Integrated PoE+ PD interface and PWM controller

PDF

Development Tools

Software Development Tools

Picture	Part number	Manufacturer	Description
	ST-DIODE-FINDER	ST	Diode product finder application for Android and iOS
	ST-VREG-FINDER	ST	Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

Part Number

ST-DIODE-FINDER

Diode product finder application for Android and iOS

ST-VREG-FINDER

Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

Power Management

Part number	Description
PM8800	Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source
PM8801	PoE-PD interface & PWM controller
PM8803	High efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller type 2 PSE indicator, plus support for forward active clamp topology
PM8804	PWM peak current mode controller for PoE and telecom systems

Part number

PM8800

Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source

PM8801

PoE-PD interface & PWM controller

PM8803

High efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller type 2 PSE indicator, plus support for forward active clamp topology

PM8804

PWM peak current mode controller for PoE and telecom systems

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Technical Documentation

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Power Management