range of ESD protection devices for microcontroller-based applications with USB interfaces

USB 2.0 advanced protection
solutions
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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
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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.
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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
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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)
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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
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