Littelfuse 在电机和功率控制的电路保护方案
2014, V3.0-A
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Agenda
1.Littelfuse Thyristor Fuse and MOV for Power Control System
2.Littelfuse TVS used on Power System
3.Littelfuse SPA Products used on I/O and others
4.Application on Different Ports Protection
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Littelfuse Circuit Protection
Protection against Common Threats to
Electrical Circuits & Components
Overcurrent
Protection
Power Cross
Overloads &
Short Circuits
Overvoltage
Protection
Power Monitoring and
Protective Switching
Power Distribution
and Control
ESD Protection
Power Switching
Power Distribution Centers
Lightning
Protection
Ground-Fault
Protection
Mining Control
Consoles
Every product that uses electrical energy needs circuit protection to ensure safety,
reliability and performance.
V3.0-A
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Corporate Mission: 2013 to 2017
Mission
Leverage our global leadership position in circuit protection to
double our business by 2017 and become a leader in power
control and sensing.
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CONTROL
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Littelfuse Circuit Protection
We Are the #1 Circuit Protection Brand in the World
We provide:
 Broadest selection of overvoltage and overcurrent protection devices
 Unparalleled level of application design expertise
 Technical support & application design help materials
 Product samples
 Global labs and testing services
V3.0-A
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Littelfuse Semiconductor
Semiconductor Circuit Protection & Power Control Expertise
The Preferred Brand of Engineers for Circuit
Protection
Leading Manufacturer of TVS Diode, TVS Diode
Array, Protection & Power Switching Thyristor, PLED
40+ Years of Technical Expertise in ApplicationBased Development & Solutions
V3.0-A
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2013
Littelfuse Semiconductor
Product Overview Including the
Broadest Line of Semiconductor Protection Solutions
• Load protection through
precise clamping of
excess surge voltage.
• Ideal for high
performance, high
reliability in AC and DC
circuit protection
• Protection from
electrostatic discharge
(ESD) & lightning
transients
• Best-in-class clamping
for signal lines and I/O
interfaces
• Silicon crowbar device to
protect power cross or
lightning surge.
• Established leadership
position in telecom/
datacom equipment
protection.
TVS Diode
TVS Diode Array
(SPA® Devices)
Protection Thyristor
(SIDACtor®
Devices)
• Power semiconductors
used to control the flow of
electrical energy
• Reliable switching for
numerous applications
including home
appliances, electrical
tools, lighting, and
HVAC
Power Switching
Thyristor
• Designed for bypass
protection of open-LED
failures
• Assures high reliability
and low maintenance in
outdoor LED lighting
applications
PLED
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2013
High level portfolio overview
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Roadmap
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Focus area 1: TRIAC for water heater
 TO-220 (8-16A)
 TO-218 (25-40A)
 New package / module
– FASTPAK (25, 35A)
– SOT227 (90A)
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Teccor
TO-218
TRIAC
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Focus area 2: SIDAC for Gas and Ion
 K2200SHRP for gas igniter at Miflex
– New ! 1200kpcs EAU expected
 Ion generator (“Plasma Cluster”) at Sharp
– More than 4000kpcs sold in last 15 month
 New comer
– SMA unidirectional SIDAC
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Marching orders…what do we want from them
in the following market
TRIAC (16-40A) for electric water heater
includes FASTPAK potential
SIDAC for gas igniter
includes SMA SIDAC potential
SIDAC for M-H lamp ballast
Kxx01GL series
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Why are Transients of Concern?





Component miniaturization has resulted in increased sensitivity to electrical
stress
Microprocessors have structures and conductive paths which cannot handle
high currents from ESD transients
They operate at very low circuit voltages
Transient voltages must be controlled to prevent device interruption or failure
Sensitive microprocessors are prevalent in a wide range of devices
such as:
• Home appliances
• Industrial controls
• Consumer electronics
• Data processing equipment
• Telecommunications
• Automotive electronic systems
• Toys
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TVS Clamping Devices
Transient Event
Vline
Voltage
Transient
Circuit Damage Level
Suppressor Clamp Level
Normal Circuit Level
Time
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TVS Equivalent Model
L
L
Body Inductance
C
Device Capacitance
Rv
Rv
C
R
R
Voltage Variable Resistor
Insulation Resistor
TVS Equivalent Model
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Bidirectional vs Unidirectional
Unidirectional
Ipp
= peak pulse current
Ir
= leakage current @ Vr
It
= test current
Vf
= max forward voltage*
Vr
= max reserve standoff voltage
Vbr
= breakdown voltage @ It
Vc
= max clamp voltage @ Ipp
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TVS Transient Protection
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Surface Mount Product Offering
SMAJ
1KSMBJ
P4SMA
SMCJ
SMBJ
P6SMBJ
1.5SMC
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SMDJ
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Axial Leaded Product Offering
P4KE
1.5KE
SA
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3KP,5KP
P6KE
15KPA,20KPA, 30KAP
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LFUS TVS AK devices is superior to MOV
based SPD module
–
Much compact in design



–
10X Smaller size than traditional SPD module
Easy for layout and assembly/ installation
Much lighter ( AK15 is around 10gm) than heavy SPD module.
Much longer in lifetime

–
NO wear-out mechanism over multiple surge events ,
temperature variance and lifetime MTBF: years.
Simply perform better


–
Foldbak technology enable precise clamping
AK Vclamp = 2 X Vstandoff.
Competition MOV Vcl over 3X Vv operating
TVS Diode instant response in a few nS compared to
MOV technology tens nS Sec
Wider operating temperature


AK: -55degree C to 150 degree C
MOV: -40 degree C to 85 degree C
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Typical TVS Applications
D.C. Supply Protection
D.C. Load Protection
EMI Limiting
A.C. Supply Protection
Single Line
Relay and Contactor Transient Limiting
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SPA products for the portable market
Discrete ESD diodes / - Small form factor arrays
Discrete ESD diodes
Low capacitance
0201 – 0.6mm x 0.3mm
SP1005-01WTG
0402 – SOD723
SP1003-01DTG
ESD arrays
SP1007-01WTG
SP3010-04UTG
SP3003 series
General purpose
SP1011-04UTG
SP1004-04VTG
SP1001 series
SP6001/SP6002 series
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Examples of circuits using silicon ESD/Surge
protection
USB 1.1, USB 2.0, USB 3.0
10/100/1000 Ethernet
USB, FireWire, DisplayPort,
VGA, eSATA
And others….
• RS-232
• RS-485
• CAN bus
• LIN bus
• SIM sockets
HDMI, DVI
Audio, analog video
Buttons, keypad, headset,
microphone, SD Card
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Our portfolio is categorized or segmented to easily find
the appropriate device for an application
General Purpose ESD Protection
• Low-speed circuits (< 100Mbps)
• Examples include power ports, keypads, buttons,
switches, audio, analog video, USB 1.1
Low Capacitance ESD Protection
• High-speed data buses (> 100Mbps)
• Examples include HDMI, USB 2.0, USB 3.0,
FireWire, DisplayPort, Ethernet, eSATA
Lightning Surge Protection
• Specifically refers to Ethernet (10/100/1000) and
xDSL circuits in which there is a requirement to
provide ESD and/or lightning surge protection (will
vary by standard, customer and application.
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The product categories are identified below with the
associated product series
General Purpose ESD Protection
SP05
SP1003
SP1006
SP1011
SP723
SP1001
SP1004
SP1007
SP720
SP724
SP1002
SP1005
SP1008
SP721
SP725
SD05
SD05C
Low Capacitance ESD Protection
SP3001
SP3004
SP3011
SP3030
SP3002
SP3006
SP3012
SP3031
SP3003
SP3010
SP3021
Lightning Surge Protection
SP03-3.3
SLVU2.8
SP4060
SP2502L
LC03-3.3
SLVU2.8-4
SP2504N
SR05
SP03-6
SRV05-4
SP3304N
SRDA05
40 active product series; with another 15 currently in development
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Littelfuse MOV Product by Series
Radial MOV Series
Industrial MOV Series
Other MOV Series
TMOV14&20 Series
ZA LA CIII ULTRA
SM7 SM20 FBMOV
MA RA CH
TMOV / iTMOV
Voltage: 4V-1000V
HA HB DA/DB BA/BB
Voltage: 9V~275V
Voltage: 115V~750V
Surge: 50A~22,000A
Voltage: 20V~28,000V
Surge:40A~4,500A
Surge:6,000A~10,000A
Size: 5mm~25mm
Surge: 12,000A~70,000A
Size: 3mm~8mm
Size: 14mm & 20mm
Size: 7mm~60mm
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SPD in AC Network
Service
Transformer /
Main Distribution
Panel
Power
Meter
Distribution
Panel
Equipment
L1
L2
kWh
L3
PEN
PE
N
Type 1 SPD
Type 2 SPD
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Type 3 SPD
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FBMOV : Typical Application
FBMOV in parallel if required for
High surge ratings
LVSP Fuse
Module with Paralleled MOVs/ SAD etc
Maybe sand/epoxy filled.
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SPD (SMOV)
Typical solution :
Need one rigid house
Or series one additional
fuse for meeting 150A fault
current
Thermal
element
MOV
SMOV
P1
Thermal
ON
disconnect
Common
MOV
Open
P2
SMOV
 Surge : 20kA In value
 Fault current : ~150A
 Indication terminals are
isolated from operation line.
 To be released in Feb. of
2012
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SPD (TMOV)
TMOV
 Surge : 20kA In value
 Fault Current : ~10A
 Need additional fault current protection
for Type 1,2 and 3 SPD application !
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MOV Market Choices: Power & Plug-In As SPD
Hard-Wired
AC
Plug-In
External
AC
SPD
Breakers
Protected
AC
AC
Wall Plug Mount
Power
Control
Center
Internal
SPD
AC
Coax
Breakers
Protected
AC
SPD
AC
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Fuse Series
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GDT and PTC
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Where are the Littelfuse parts can be found?
Auto Motor Controller
And Accessories'
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For Power System Protection
Design Notes:
Protection Application: Products that are directly connected to the AC mains (120 to
250VACrms) will be exposed to much more severe surge transients (lightning, load
switching, etc.) and short circuit/overload conditions than on DC inputs. Because of
this, the protection devices need to be more robust.
Solution Description: As shown at the left (top), a cartridge or leaded fuse (5x20mm,
2AG, 3AG, TE5/TR5) can be used for short circuit and overload current conditions.
For surge protection, an MOV (e.g. C-III, UltraMOV and LA series) with high energy
handling capabilities should be used.
For products that also require electrical isolation between the hot and neutral lines
and chassis (earth) ground, a GDT should be selected (left, bottom). The GDT is
used to provide electrical isolation for the safety of the consumer.
Companion Solutions: Does not apply.
Regulatory Issues: Standards that specify safety and performance criteria include:
• UL 6500/IEC 65065
• UL1414
• UL1449
AC Lines Solution Description:
1）TMOV
TMOV14RP385E 14mm
TMOV20RP385E 20mm
TMOV14RP3420E 14mm
TMOV20RP420E 20mm
2)GDT
SL1011A500
SL1011A600
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385Vac 505VDC
385Vac 505VDC
420Vac 560VDC
420Vac 560VDC
500VDC
600VDC
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A Typical Power line Schamatic
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Circuit Protection of 110VDC
Fuse: 0218012.MXEP
Outside World
Primary protection:
AK6-066C
Design Notes:
This solution include two parts,
the first is primary protection High
surge for lighting protection
The secondary is Littelfuse 5kW
TVS as a low voltage protection.
Shield
Ground
TVS:SMDJ130A
A fuse or Fuse is used as over
current protection
Basically you must select a Lower
voltage TVS as over voltage
protection.
6KA 8/20us
FUSE: 0218012.MXEP 2pcs
TVS:AK10-066 3pcs
8/20us 6KA Surge Capability
TVS:SMDJ130A 1pc
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Circuit Protection of 24VDC
Outside World
Primary protection:
AK10-030
TVS:SMDJ28A
Cx
Cx
NM Choke
CM Choke
Cy
Shield
Ground
10KA 8/20us
FUSE: 0453001 2pcs
TVS:AK10-030 3pcs
TVS:SMDJ28A 1pc
Fuse: 0451001
Design Notes:
This solution include two parts, the first is primary
protection High surge for lighting protection
The secondary is Littelfuse 5kW TVS as a low
voltage protection.
A fuse or Fuse is used as over current protection
Basically you must select a Lower voltage TVS
as over voltage protection.
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Example of SP4060-08ATG used on Ethernet
2.5V, 4.4pF Diode Array for Surge Protection
 Target Applications:
– 10/100/1000 Ethernet
– Set top box (consumer and
security)
– Notebooks, network hardware
 Features/benefits:
–
–
–
–
Capacitance value of 4.4pF
Low RDYN of 0.4Ω (low clamping)
Low turn on voltage of 2.5V
Rated for 20A surge current
(tP=8/20µs, per IEC 61000-4-5)
– ±30kV contact discharge
– MSOP-10 package
– 8 channels
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SLVU2.8-4BTG Series
2.8V, 40A TVS Array for Lightning Surge Protection
 Target Applications:
–
–
–
–
10/100/1000 Ethernet
WAN/LAN Equipment
Base Station Controllers
Desktops, Notebooks, Servers
 Features/benefits:
– Low capacitance of 2.0pF
– Low Clamping Voltages
– Lightning Protection up to 40A
 (tP=8/20µs, per IEC 61000-4-5)
– ±30kV contact discharge
– SOIC-8 package allows
easy trace routing
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Circuit
Protection
Ethernet
Circuit
Protection
of Ethernet portof
(Lightning)
Port
-Lightning, Inter-building (GR-1089)
Design Notes:
Protection Application: The data signals used in an Ethernet port vary between
1.0V (1000Base-T and 100Base-TX) to 2.5V (10Base-T), with maximum data
rates of 1000Mbps, 100Mbps and 10Mbps, respectively. At these data rates,
the capacitance of the suppressor needs to be taken into account. The signal
lines to be protected from lightning include Tx± and Rx±.
Solution Description: As shown at the left, Telelink fuses are used for overcurrent protection for each data line, and the SEP series SIDACtor can be used
for primary protection from lightning per the GR-1089 inter-building standard
(500A, 2/10µs). The SEP064 has a working or standoff voltage of 58V allowing
it be used in PoE and PoE+ applications. Last, a low capacitance diode array is
used for secondary protection to suppress any let-through energy.
Companion Solutions: Other solutions within the LF portfolio exist in addition to
these recommendations such as the SEP008 series. This lower voltage option
can lower the clamping voltages in applications that do not need the higher
standoff voltage due to PoE and PoE+ applications.
Ethernet: SEP0640Q38CB SIDACtor
& SP3050-04HTG SPATM
Regulatory Issues: Many standards could apply depending upon the end
equipment usage such as GR-1089 or the IEC61000-4-5. Please consult
Littelfuse for application support.
Note: For 1GbE (1000Base-T) the
protection scheme should replicated
for the other 4 data lines.
Unique Features: None
Road Map Products to be Watching for: SP4061 Series: < 4pF, 2.5V, 20A
(tP=8/20µs) Surge Protection (enhanced clamping for PHY protection)
Ordering Number
Surge (tP=2/10µs)
I/O Capacitance @ VR=0V
Channels
VRWM
Packaging
SEP0640Q38CB
500A
See datasheet
2
58V
QFN (5x6mm)
SEP0080Q38CB
500A
See datasheet
2
6V
QFN (5x6mm)
10A
2.4pF
4
6V
SOT23-6
SP3050-04HTG
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Circuit Protection of USB 2.0 port
D+/D-: SP3003-02 silicon protection array
USB
Port
0805L050
SP1003-01DTG
Protection Application: The data signals used in a USB 2.0 port
vary between 0V to +0.5V, with a maximum data rate of
480Mbps. At this data rate, the capacitance of the suppressor
needs to be minimized. The signal lines to be protected from
ESD include D+ and D-. The 5VDC power bus should be
protected against ESD and overcurrent events.
USB 2.0
Controller
Outside World
VBUS
D+
D-
SP3003-02JTG
Shield
Ground
Signal
Ground
D+/D-: SP1007-01 silicon protection diode
USB
Port
USB 2.0
Controller
Outside World
0805L050
VBUS
D+
D-
SP1007-01WTG
Shield
Ground
Design Notes:
Signal
Ground
Solution Description: As shown at the left, a discrete diode is
used on the power bus for ESD protection, and a PTC is used
for resettable overcurrent protection. For the data lines, a twochannel array with 0.65 pF is used for ESD protection of the data
lines.
Companion Solutions: Other solutions within the LF portfolio
exist in addition to these recommendations. For example, if the
operating current on the power bus is higher or lower, an
appropriately rated PTC can be chosen.
Regulatory Issues: The IEC 61000-4-2 will be the most
appropriate standard that applies for this port. It supplies a test
method for verifying that the end product is not susceptible to
ESD events.
Unique Features: Does not apply.
Application Warnings: Does not apply.
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Circuit Protection of RS485
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Circuit Protection of RS485/CAN
Design Notes:
Outside World
Primary protection
The secondary is Littelfuse
SIDACtor as a low voltage
protection.
Shield
Ground
10KA 8/20us
FUSE: 04611.25 2pcs
GDT:SL1411A075SM 3pcs
SIDACtor: P0080SC MC
This solution include two
parts, the first is primary
protection GDT for lighting
protection. If possible this
application is for our door
cable protection.
3pcs
A fuse or Fuse is used as
over current protection
Basically you must select a
SIDACtor as over voltage
protection.
8/20us 5KA Surge Capability
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Circuit Protection of RS232
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SIDACtor for Tertiary Protection
NEW SDP Series in SOT23-6
SIDACtor® SDP
Series in the
SOT23-6
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Example Application
IGBT Driver Boar : PTC and TVS
Power input: SMBJ 16ACA
PTC 1812L200
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Thank you!
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