Introducing the PM Pair Power-over-Ethernet Powered Device Solution

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1 Introducing the PM Pair Power-over-Ethernet Powered Device Solution Vipin Bothra STMicroelectronics

2 Typical System Architecture Power over Ethernet 4 Power AC line UPS PSE(Power Sourcing Equipment) Solutions for Powered Devices ST PoE-PD products are interoperable with all PSE in the market *A MIDSPAN architecture can be used in existing installation. A power-hub have to be added between the PoE switch and PD

3 PoE: Power over Ethernet PSE: Power Source Equipment PD: Powered Device Basic Glossary Power over Ethernet Endspan: an Ethernet switch enabled to provide PoE on each port Midspan: a device connected in-line to inject power 3

4 IEEE802.3 Standard for Power over Ethernet 4 Technology IEEE Standard Date PSE (Pout) PD (Pin) PoE IEEE802.3af W W PoE+ IEEE802.3at W 25.5 W UPoE/PoE++ Cisco/Microsemi/LT 2012/ W 51 W 4Pair PoE IEEE802.3bt Q4-17/Q1-18 Now draft W 71W

5 PoE-PD Power Management Simplified Block Diagram 5 48V Polarity Protection Diode bridge or MOSFET active bridge Hot-Swap PoE interface (Signature and Class detection) IEEE 802.3af/at/bt compliant 48V DC/DC converter or PWM controller or LED driver 12/5/3.3V PM8805 VFQFPN43 8x8mm 5 Exposed PADS PCB area extremely reduced Flexibility/Optimization for the converter portion

6 1 C la s s r e s is to r s m u s tb e s e le c te d fo r th e BoM and PCB Area Reduction 6 Chassis Chassis T? J? R? 75R J? 16 9 Chassis Chassis DATA & POWER INPUT R? 75R DATA OUTPUT R? 75R R? 75R R? 75R R? 75R R? 75R R? 75R ETH nF 2KV R? 0R 10nF 100V 10nF 100V 10nF 100V 10nF 100V Chassis R? NM nF 2KV nf 100V D? SMAJ58CA SMA 1 nf 100V D? SMAJ58CA SMA Chassis T0 T1 T2 FAUX RAUX STBY R? R? R? 47K 47k 47k R? R? R? 10K 10K 10K R? R? tbd (1) tbd (1) 1% 1% nF EP EP4 ExPad IN78 VB STBY CLS1 CLS2 AGND T0 T1 T2 FAUX RAUX IN12 ExPad GND78 GND78 U1 PM8805 VFQFPN 8X8X1.0 43L GND12 GND IN78 IN78 IN12 IN VOB 39 VOB 38 VOB VOB IN45 IN45 IN36 IN GND45 GND45 GND36 GND ExPad IN45 EP2 33 VCP DET 30 VDD VOB 29 EP6 ExPad EP5 ExPad 28 VOUT 27 VOUT NC 26 PGD CTRL 23 IN36 EP3 ExPad 3 470pF 100V 1% D? BAV70 10nF R? SMAJ58A 26.1k V D? SMA 100nF V R? 100k nF V VOUT PGD 33uF 100V 10x10.2 ~800mm2 power class for each specific design ~64mm2 VFQFPN56 8x8mm

7 PM8805 Thermal Map 7 48V, 4 Pair 2A 48V, 4 Pair 1A Measured Rja ~ 23 C/W

8 New PD types and classes from 802.3bt 9 New PSE types Type 3 up to 60W Type 4 up to 99.9W New PD types and classes Type 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 Parameter CLS1 CLS2 resistor (Ω) resistor (Ω) Class 0 2K NA Class NA Class NA Class NA Class NA New Class K New Class New Class New Class

9 Flexible and Smart Standard Operations Set-up 10 Combination of signals FAUX, RAUX, STBY set 4 standard operation modes: 1. Normal PoE 2. Stand-by 3. Front aux 4. Rear aux Plus 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 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 *more details are reported in the product datasheet

10 Standard Operation Modes 11 Normal PoE FAUX RAUX STBY Stand-by DET / CLS / Converter enabled after inrush phase PGD 1 after 75ms Hot Swap enabled Hot Swap UVLO Charge Pump UVLO Active Bridge Enabled MPS MPS is activated to avoid PSE disconnection Off FAUX RAUX STBY PGD 1 when Hot Swap closed Hot Swap Charge Pump Active Bridge MPS UVLO Off LS Enabled HS OFF On Front AUX Activated if V AUX > UVLO or V FAUX >1.25V FAUX RAUX STBY PGD 1 when Hot Swap closed Hot Swap Charge Pump Active Bridge MPS Closed On Enabled Off Rear AUX FAUX RAUX STBY Priority can be set. Minimum voltage 12V PGD Hot Swap Charge Pump Active Bridge 1 Open Off Off Off MPS

11 Special Operation Modes 13 Sleep/wake up FAUX RAUX STBY Latched Shutdown FAUX RAUX STBY Rear Aux with MPS FAUX RAUX STBY System in deep SLEEP MODE but ready for a FAST WAKE-UP PGD PGD System reboots completely Hot Swap Charge Pump Active Bridge MPS 0 OPEN OFF OFF OFF PoE/Aux mutual exchange (PoE first, VAUX=48V) PGD Hot Swap Hot Swap Charge Pump Charge Pump Active Bridge Active Bridge MPS 0 OPEN OFF LS Enabled HS OFF ON MPS 1 OPEN OFF LS Enabled HS OFF ON

12 Smart Hot Swap MOSFET 14 Controlled inrush phase 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) 3 faults detection 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.

13 Benefit from PoE in SMART Lighting 15 SINGLE CABLE for data and power Worldwide STANDARD RJ45 connector Data gathering of building usage Personal control of intensity and temperature settings Simpler and less expensive installations (below 60V SELV) Coming soon 99.9W PSE power.3.bt (*) OPPORTUNITY from new standard The increased power level up to 99.9W allows to achieve a good coverage of the professional lighting product portfolio

14 Smart LED driver architecture up to 100W using PM Ethernet: 48V PM V to 48V POE management LDO DC-DC 48V to 3.3V LED DRIVER STM32 Constant current I2C Sensor Module LEDs block

15 PoE products 18

16 12.95W input power.3.af PM8800A Single chip: Interface + hot-swap+ PWM Power Over Ethernet Innovation for Powered Devices 25.5W input power.3.at Green features embedded PM8801 Interface + hot-swap+ PWM 71W PD input power.3.bt (*) PM8805 Active Bridge + Interface+ hot-swap ES Available new 19 PM8803 Interface + hot-swap+ PWM PM8804 PWM controller PM8805 companion chip ES rev1 Available new Power Over Lighting 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 Technology IEEE Standard Date PSE (Pout) PD (Pin) PoE IEEE802.3af W W PoE+ IEEE802.3at W 25.5 W UPoE/PoE++ Cisco/Microsemi/LT 2012/ W 51 W 4PPoE IEEE802.3bt TBD 99.9W 71W

17 Best fit features Power over Ethernet Powered Device 6 PWM ctrl with E/A inside 13W PM8800A IEEE 802.3af PD interface PWM current mode controller Integrated 100V, 0.5Ω, 800mA HOT SWAP MOS Support both isolated and non isolated topologies PWM ctrl inside 30W 60W Using external booster PM8803 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 PWM ctrl inside Green features embedded 30W PM8801 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 3/30/2017

18 PM PoE-PD interface IEEE802.3bt with embedded Dual Active Bridge 1. Compliance with IEEE802.3bt draft Dual active bridge using 100V / 150mOhm MOSFETS LV-HV creepage assured MOS bridge MOS bridge PoE 802.3bt interface & Bridge ctrl MOS bridge MOS bridge MOS Hot swap VFQFPN43 8x8mm 6 Exposed PAD 800mm2 for a Discrete Active bridge 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 driver MOS bridge MOS bridge MOS bridge MOS bridge top bottom UNDER DEVELOPMENT ES Available Production September 2017

19 PM V PWM controler PM8805 PGD 48V PM8804 Ext PMOS PM8805 companion chip 1 AGND 2 SS 3 DT 4 FSW EP 17 BLK 16 CTL 15 CS 14 MODE 13 QFN16 3X3mm NC PGD NC VIN PGND 12 GATE2 11 VC 10 GATE1 9 QFN16 3x3mm Exposed PAD High efficiency converter topologies: Flyback, Forward, Forward active clamp, Flyback with synchronous rectification. Flyback with active clamp 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 UNDER DEVELOPMENT ES Available Production September 2017

20 Takeaways 23 The PM8805..

21 Back up slides Presentation Title 30/03/2017