Introducing the PM88054 Pair Power-over-Ethernet Powered Device SolutionVipin Bothra

STMicroelectronics

Power• AC line• UPS

*A MIDSPAN architecture can be used in existing installation. A power-hub have to be added between the PoE switch and PD

PSE(Power Sourcing Equipment)Solutions for

Powered Devices

ST PoE-PD products are interoperable with all PSE in

the market

Typical System ArchitecturePower over Ethernet

4

Basic GlossaryPower over Ethernet

• PoE: Power over Ethernet

• PSE: Power Source Equipment

• PD: Powered Device

• Endspan: an Ethernet switch enabled to provide PoE on each port

• Midspan: a device connected in-line to inject power

3

IEEE802.3Standard for Power over Ethernet

4

Technology IEEE Standard Date PSE(Pout)

PD(Pin)

PoE IEEE802.3af 2003 15.4 W 12.95 WPoE+ IEEE802.3at 2009 30 W 25.5 WUPoE/PoE++ Cisco/Microsemi/LT 2012/2009 60 W 51 W

4Pair PoE IEEE802.3bt Q4-17/Q1-18Now draft 2.3 99.9W 71W

PoE-PD Power Management Simplified Block Diagram 5

PoE interface(Signature and Class detection)

IEEE 802.3af/at/bt compliant

Polarity Protection

Diode bridgeor

MOSFET active bridge

Hot-Swap DC/DC converteror

PWM controlleror

LED driver

48V

Flexibility/Optimization for the converter portion

12/5/3.3V48V

VFQFPN43 8x8mm5 Exposed PADS

PM8805

PCB area extremely reduced

BoM and PCB Area Reduction 6

C?1 nF

0603100V

C?1 nF

0603100V

D?

SMAJ58CASMA

D?BAV70

13

2

D?

SMAJ58CASMA

U1

PM8805

VFQFPN 8X8X1.0 43L T29

VB2

VOUT27VOUT28

CTRL24

FAUX10

AGND6

T07

CLS25

PGD25

GN

D12

14

DET31

T18

STBY3

GN

D78

42

IN78

40

VO

B38

IN45

37

IN45

36

GN

D45

35

IN12

16

VO

B18

IN36

19

IN36

20

GN

D36

21

IN1212

IN78

41IN

1215

CLS14

IN781

RAUX11

GN

D36

22

VO

B39

GN

D45

34

GN

D78

43G

ND

1213

VCP32

IN3623

VOB29VDD30

VO

B17

IN4533

NC26

ExPadEP4

ExPadEP3

ExPadEP2

ExPadEP1

ExPadEP6

ExPadEP5

PGD

R?75R0603

R?75R0603

R?75R0603

R?75R0603

C?10nF0603100V

C?10nF0603100V

C?10nF0603100V

R? 75R

0603

R? 75R

0603

R? 75R

0603

R? 75R

0603

R?NM

0805

Chassis

VOUT

C?10nF0603100V

C?2.2nF

18122KV

Chassis

C?

10nF 50V

Chassis

D?

SMA

J58A

SMA

T?

ETH1-460

23

22

24

21

20

196

5

4

7

3

12

8

9

10

18

17

16

15

14

13

11

12

C?100nF

0805100V

J?

DATA & POWER INPUT

12345678

910

J?

DATA OUTPUT

12345678

910

R?

26.1k1%

C?470pF100V

ChassisChassis

Chassis

R? 0R

1206

C?2.2nF

18122KV

R?tbd (1)

08051%

R?tbd (1)

08051%

T2

FAUX

R?10K

RAUX

R?10K

R?10K

STBY

T1

C?

100nF

T0

R?47K

R?47k

R?47k

R?

100k 1206

1 C la s s r e s is to r s m u s t b e s e le c te d fo r th e

power class for each specific design

C?100nF

0805100V

C?33uF100V

10x10.2

~800mm2

VFQFPN56 8x8mm

~64mm2

PM8805 Thermal Map 7

48V, 4 Pair 2A

Measured Rja ~ 23 C/W

48V, 4 Pair 1A

New PD types and classes from 802.3bt 9

New PD types and classesType 3: class 0-3 (13W), class 4 (25.5W), class 5 (40W) , class 6 (51W)

Type 4: class 7 (62W) , class 8 (71W)

Autoclass available

New PSE typesType 3 up to 60W

Type 4 up to 99.9W

Parameter CLS1 resistor (Ω)

CLS2 resistor (Ω)

Class 0 2K NAClass 1 150 NAClass 2 80.6 NAClass 3 51.1 NAClass 4 36.5 NA

New Class 5 36.5 2KNew Class 6 36.5 150New Class 7 36.5 80.6New Class 8 36.5 51.1

Flexible and Smart Standard Operations Set-up 10

Combination of signals FAUX, RAUX, STBY set 4 standard operation modes:1. Normal PoE2. Stand-by 3. Front aux4. Rear auxPlus other non standard modes*

Stand-by• Internal quiescent current is minimized• MPS circuitry is turned ON • MPS current and duty cycle calibrated on PSE type• Hot-swap MOSFET stays on in linear zone• DC/DC operation enabled

*more details are reported in the product datasheet

Auxiliary source• Auxiliary sources can be connected prior (front) or after

(rear) hotswap MOSFET and its threshold can be selected.Front• will take power from auxiliary source or from the PoE line

depending on the voltage level of each source, the highest wins.

Rear• Priority of the external source with respect to the PoE

Standard Operation Modes 11

Normal PoE

FAUX RAUX STBY

0 0 0

Priority can be set. Minimum voltage 12V

PGD Hot Swap Charge Pump Active Bridge MPS

1 Open Off Off Off

DET / CLS / Converter enabled after inrush phase

MPS is activated to avoid PSE disconnection

Activated if VAUX > UVLO or VFAUX >1.25VPGD Hot Swap Charge

Pump Active Bridge MPS

1 when Hot Swap closed Closed On Enabled Off

PGD Hot Swap Charge Pump Active Bridge MPS

1 when Hot Swap closed Closes @ UVLO Off LS Enabled HS OFF On

PGD Hot Swap Charge Pump Active Bridge MPS

1 after 75ms Hot Swap enabled Closes @ UVLO On @

UVLO Enabled Off

Stand-by

FAUX RAUX STBY

0 0 1

Front AUX

FAUX RAUX STBY

1 0 0

Rear AUX

FAUX RAUX STBY

0 1 0

Special Operation Modes 13

Rear Aux withMPS

Sleep/wake up

LatchedShutdown

System reboots completelyPGD Hot Swap Charge

Pump Active Bridge MPS

0 OPEN OFF OFF OFF

System in deep SLEEP MODE but ready for a FAST WAKE-UP

PoE/Aux mutual exchange (PoE first, VAUX=48V)PGD Hot Swap Charge

Pump Active Bridge MPS

1 OPEN OFF LS Enabled HS OFF ON

PGD Hot Swap Charge Pump Active Bridge MPS

0 OPEN OFF LS Enabled HS OFF ONFAUX RAUX STBY

1 1 1

FAUX RAUX STBY

1 1 0

FAUX RAUX STBY

0 1 1

Smart Hot Swap MOSFET 14

• Internal current source charges the output

capacitor (Vin>UVLO)

• Only at the end of the inrush phase (85ms typ)

the PWM is enabled (PGD=1)

Controlled inrush phase

1. Short circuit between VOUT and GND

2. A severe hot-swap MOSFET overcurrent

3. Voltage drop higher than 12V across the hot

swap MOSFET

In case of a fault a new startup attempt is performed after 10ms.

3 faults detection

Benefit from PoE in SMART Lighting 15

OPPORTUNITY from new standardThe increased power level up to 99.9W allows to achieve a good

coverage of the professional lighting product portfolio

Worldwide STANDARD RJ45 connector

SINGLE CABLE for data and power

Data gathering of building usage

Personal control of intensity and temperature settings

Simpler and less expensive installations (below 60V SELV)

.3.bt (*)

99.9WPSE power

Coming soon

Smart LED driver architectureup to 100W using PM8805 16

Eth

erne

t: 4

8V

PM880548V to 48V

POE management

LDODC-DC

48V to 3.3V

LED DRIVER

STM32Sensor Module

LEDsblock

Constant current

I2C

PoE products

18

Technology IEEE Standard Date PSE(Pout)

PD(Pin)

PoE IEEE802.3af 2003 15.4 W 12.95 W

PoE+ IEEE802.3at 2009 30 W 25.5 W

UPoE/PoE++ Cisco/Microsemi/LT 2012/2009 60 W 51 W

4PPoE IEEE802.3bt TBD 99.9W 71W

Power Over EthernetInnovation for Powered Devices

19

.3.af

12.95Winput power

PM8800ASingle chip:

Interface + hot-swap+ PWM

PM8801Interface + hot-swap+ PWM

Green features embedded

.3.at

25.5Winput power

PM8803Interface + hot-swap+ PWM

PM8804PWM controller

PM8805 companion chip

PM8805Active Bridge +

Interface+ hot-swap

.3.bt (*)

71WPD input power

Power Over Lighting

new

ESAvailable

new

ES rev1Available

Midspan architecture can be used in existing installation. A power-hub has to be added between the PoE switch and PD.• Endspan: an ethernet switch enabled to provide PoE

on each port• Midspan: a device connected in-line to inject power

Best fit featuresPower over Ethernet – Powered Device 6

3/30/2017

• IEEE 802.3af PD interface• PWM current mode controller• Integrated 100V, 0.5Ω, 800mA HOT SWAP MOS• Support both isolated and non isolated topologies

PM8800A

• IEEE 802.3at PD interface• PWM current mode controller with double gate driver• Integrated 100V, 0.45Ω, 1A HOT SWAP MOS• Support isolated high efficiency topologies: fly-back, forward

active clamp, fly-back with synchronous rectification

PM8803

• Sleep mode with LED indicator and Maintain Power Signature• IEEE 802.3at PD interface + PWM current mode ctrl with double gate

driver• Integrated 100V, 0.45Ω, 640mA hot swap MOSFET• Support isolated high efficiency topologies: fly-back, forward active

clamp, fly-back with synchronous rectification

PM8801Green features

embedded

PWM ctrl with E/Ainside

PWM ctrlinside

PWM ctrlinside

30W60W

Using external booster

30W

13W

PM8805 8

PoE-PD interface IEEE802.3bt with embedded Dual Active Bridge

1. Compliance with IEEE802.3bt draft 2.3

2. Dual active bridge using 100V / 150mOhm MOSFETS

3. Hot Swap MOSFET : 100V / 150mOhm

4. 4 pair PoE application

5. External auxiliary source

6. Stand-by mode with MPS (maintain power signature)

7. PGOOD signal to enable external DC-DC or LED driverPoE 802.3btinterface

& Bridge ctrl

LV-HV creepage assured

MOSbridge

MOSbridge

MOSbridge

MOSbridge

MOSHot swap

MOSbridge

MOSbridge

MOSbridge

MOSbridge

bottom

800mm2 for a Discrete Active bridge

VFQFPN43 8x8mm6 Exposed PAD

ES AvailableProduction September 2017

UNDER DEVELOPMENT

top

PM8804 8

48V PWM controler

• Settable Frequency up to 1MHz

• Embedded High Voltage Start-up

• 100V technology

• Dual low side complementary drivers

• Protections: OCP, feedback discon., thermal shutdow

• Companion chip of PM8805

ES AvailableProduction September 2017

UNDER DEVELOPMENT

QFN16 3X3mm

NC

7

AGND1

BLK

16

GATE19

VC10

PGD

6

FSW4

SS2

MO

DE

13C

S14

CTL

15

GATE211

PGND12

DT3

VIN

8

NC

5

EP17

QFN16 3x3mmExposed PAD

ExtPMOS

48VPM8804PM8805

PGD

High efficiency converter topologies:Flyback, Forward, Forward active clamp, Flyback with synchronous rectification. Flyback with active clamp

PM8805 companion chip

Takeaways• The PM8805 …..

23

Back up slides

30/03/2017Presentation Title