USB 2.0 advanced protection solutions Is this presentation suited for you? Where do you stand with USB protection? Beginner? Intermediate? Advanced? I am not familiar with this subject. I am in the discovery phase and would like an overview and a basic understanding of the technology. I have a basic understanding of this subject. I would like to go deeper in details and tackle more aspects of this subject. I am very familiar with this subject. I would like to deepen my knowledge and become an expert. Click here to continue to next slide Click here to continue to next slide Click here to continue to next slide Overview Basic In depth 2 Basics on USB 2.0 (1) 3 USB stands for Universal Serial Bus It is very popular and present on most electronic devices It is a serial bi-directional bus that is hotpluggable and supports Plug and Play. USB power line protection 3 data lines: • D+ VBUS • D- D- • ID (for USB On-The-Go only) 1 power line: VBUS D+ USB transceiver ID GND 3 standards: • Low speed (1.5 Mbit/s) • Full speed (12 Mbit/s) • High speed (480 Mbit/s) USB data line protection Not mandatory. Only for USB On-The-Go USB 2.0 basics (2) Parameters Low speed Full speed High speed Data rate Up to 1.5 Mbit/s Up to 12 Mbit/s Up to 480 Mbit/s Termination Not terminated Not terminated 90 Ω differential 45 Ω to ground Signaling – Logical low level VD+ = 0 to + 0.3 V VD- = 2.8 to 3.6 V VD+ = 0 to + 0.3 V VD- = 2.8 to 3.6 V VD+ = −10 to + 10 mV VD- = +360 to +440 mV Signaling – Logical high level VD+ = 2.8 to 3.6 V VD- = 0 to + 0.3 V VD+ = 2.8 to 3.6 V VD- = 0 to + 0.3 V VD+ = +360 to +440 mV VD- = −10 to + 10 mV From 4.4 V to 5.5 V From 4.4 V to 5.5 V From 4.4 V to 5.5 V 500 mA 500 mA 500 mA VBUS voltage (standard downstream port) VBUS max current (standard downstream port) V mV 5 500 4 3 300 2 200 1 100 VD0 1 VD+ 400 VD+ 0 VD0 1 0 4 Focus on power: charging ports • Purpose: Charging batteries through the VBUS pin. • Need for a current rate higher than 500 mA for the standard downstream port. • The USB Battery Charging Specification (first release in 2007) defined a new type of port called charging port. • Even if the maximum current is 5.0 A for safety, most USB cables are rated up to 1.5 A, thus creating a limitation. Standard downstream port (SDP) Standard Charging downstream port (CDP) Dedicated charging port (DCP) USB Battery Charging Specification Revision 1.2 (released in 2010) Data transfer enabled Yes Yes (max. current 900 mA on VBUS during high speed transfer) Maximum current on VBUS 500 mA @ 5V 1.5 A @ 5V (USB cables rated at 1.5A only) No (D+ and D- shorted) 5A with voltage > 2V (USB cables rated at 1.5A only) 5 Focus on power: USB Power Delivery • To further develop the “power” aspect of USB ports, the USB Power Delivery (PD) specification was released in July 2012. • 6 power profiles are defined extending the supply voltages (Profile 0 is reserved) • This requires new cables withstanding voltages higher than 5 V and currents higher than 1.5 A. • Profile 4 is the limit for micro-B/AB connectors. Profile 5V 12 V 20 V 1 2 3 1.5 A, 18 W 2.0 A, 10 W 3.0 A, 36 W 4 5 3.0 A, 60 W 5.0 A, 60 W 5.0 A, 100 W 6 The need for ESD protection devices Advanced technology with very thin lithography and gate oxides are highly vulnerable to ESD Integrated electronics systems with highcomponent-density PCBs facilitate ESD coupling and propagation USB transceivers and controllers … IC manufacturers are reluctant to make robust embedded ESD protection diodes that would take up a significant active area of their advanced and expensive technology. 7 Why ultra-low capacitance ? • The parasitic capacitance of ESD protection devices must be low enough to allow USB 2.0 high-speed signals (maximum data rate: 480 Mbit/s) to be transmitted without degradation. • A high parasitic capacitance of the ESD protection devices would increase too much the signal rise/fall time and prevent communications. Example of the impact of parasitic capacitance on high-speed signal simulated with discrete capacitance Time domain Fall time too HIGH Rise time too HIGH Frequency domain Bandwidth is too narrow 8 Data rate (Gbit/s) EMI filtering & ESD protection for USB datalines System-level ESD protection (IEC 61000-4-2 Level 4 ) + Common-mode filter (ECMF) 10 ESDAXLC6-1BU2 HSP051-4N10 1-line ESD ST0201 0.6 x 0.3 x 0.3 mm 4-line ESD QFN 1.85 x 0.95 x 0.32 mm USBULC6-2N4 HSP051-4M10 2-line ESD QFN 1.0 x 0.8 x 0.5 mm 4-line ESD QFN 2.50 x 1.00 x 0.47 mm 5 0.48 USBLC6-2P6 ECMF02-2HSMX6 ECMF04-4HSWM10 2xESD + 2xCMF QFN 1.70 x 1.50 x 0.5 mm 4xESD + 2xCMF QFN 2.60 x 1.35 x 0.5mm ECMF02-3HSM6 ECMF04-4HSM10 3xESD + 2xCMF QFN 1.60 x 1.35 x 0.5 mm ECMF02-2AMX6 2-line ESD + VBUS 6V SOT-666 1.6 x 1.6 x 0.53 mm 3xESD + 2xCMF QFN 1.70 x 1.50 x 0.5 mm 4xESD + 2xCMF QFN 2.60 x 1.35 x 0.5mm ECMF02-4CMX8 3xESD + CMF + VBUS TVS 16V QFN 2.60 x 1.35 x 0.5mm USBLC6-4SC6 4-line ESD + VBUS 6V SOT23 2.92 x 1.62 x 1.17 mm 0.012 USBDF01W5 / USBUF01W6 USBLC6-2SC6 4xESD + Serial / Pull-up Resistor SOT323 2.00 x 1.25 x 0.95 mm 2-line ESD + VBUS 6V SOT23 2.92 x 1.62 x 1.17 mm 1 or 2 lines 4 lines 2 lines EMIF02-USB03F2 7xESD + Serial and Pull-up Resistor CSP 1.44 x 1.94 x 0.65 mm 4 lines ECMF = Common-mode filter with integrated ESD protection Click to know more about ECMF™ 9 USB Power Delivery - ESD & EOS protection INTEGRATION SMALLEST VBUS (Typ.) STRONGEST With USB 2.0 datalines SMM4F24A 20 V Ipp = 60A, Ppp = 2300W 12 V NEW 9V ESDA13P70-1U1M Ipp = 70A, Ppp = 1300W NEW 5V 10 ESDA7P60-1U1M Ipp = 60A, Ppp = 700W 1610 0.55mm NEW ECMF02-4CMX8 SMM4F13A 2-lane CMF + ID + VBUS 16V 2.50 x 1.20 x 0.50 mm Ipp = 85A, Ppp = 2300W ECMF2-0730V12M12 1 SMM4F12AVCL 2-lane CMF + ID + VBUS 13V 2.60 x 1.35 x 0.5 mm Ipp = 100A, Ppp = 2200W HSP061-2M6 SMM4F6.0A 2-line ESD + VBUS 1.45 x 1.00 x 0.55 mm Ipp = 170A, Ppp = 2300W QFN SMA Flat Package & Size 0.85mm Let’s go further Basic information ECMF™ series portfolio overview: common-mode filters embedding ESD protection - Product presentation HSP series portfolio overview: High-speed port ESD protection - Product presentation TVS short-pulse dynamic resistance measurements... Application note AN4022 In-depth information IEC 61000-4-2 standard testing - Application note AN3353 Pspice models: ESD protection and ECMF™ Selection & sampling Our Protection devices &Integrated EMI filtering selection guide Our USB port protection product selector Our USB IPAD™ (including ECMF™) product selector 11