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Wireless Charger
Solutions
Mobile and wearables
REV0720
Users must independently evaluate the suitability of and test each product selected for their own specific applications. It is the User’s sole responsibility to determine fitness for a
particular system or use based on their own performance criteria, conditions, specific application, compatibility with other parts, and environmental conditions. Users must
independently provide appropriate design and operating safeguards to minimize any risks associated with their applications and products. Littelfuse products are not designed
for, and may not be used in, all applications. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics.
2Littelfuse, Inc. © 2020 2
Consumer, medical, and industrial applications are
creating a wave of wireless charging opportunities
Portable medical device
Phone
Wireless
Charger
Mobile scanner
E-toothbrush
In-cabin Automotive
Headphone
Watch
Coffee table
3Littelfuse, Inc. © 2020 3
Wireless charging: powering a more convenient world
0
100
200
300
400
500
600
700
800
2018 2019 2020 2021 2022 2023
Transmitters
(e.g. Charging Pads)
0
200
400
600
800
1000
1200
1400
1600
2018 2019 2020 2021 2022 2023
Receivers
(e.g. Smartphones)
Quality living
Source: IHS Markit
Market trends and drivers
 User convenience is driving consumer applications
 Fewer cables allow for cleaner, less cluttered surfaces
 Charging ports can become collection points for dust, dirt, and debris,
which can cause overheating faults
 Consumer devices, such as phones and watches, are driving
market growth
 Medical and industrial applications are adopting wireless charging
 Automotive in-cabin charging for consumer devices is increasingly
being added to vehicular models
 Consumer product market leaders have standardized inductive
charging to the Qi standard, allowing for further market adoption
 Inductive wireless charging is popular for low-power needs (<70 W),
as in consumer devices
 Magnetic resonant wireless charging will help drive additional
use-cases like charging a vehicle
Ingenico and Verifone comprise 80% of global
transactions
% CAGR Inductive wireless charging unit shipments
4Littelfuse, Inc. © 2020 4
Components recommendations for wireless chargers
Acronyms:
TVS: transient voltage suppressor
Charging pad
 Fuse
 TVS Diode, Diode Array
 setP™*
Power adapter
 Fuse
 TVS Diode
 N-channel MOSFET
 Barrier rectifier diode
 setP™*
*For use with a USB Type C adapter
Charging cable
 setP™*
Protect Control Sense
5Littelfuse, Inc. © 2020 5
Component recommendations for
power adapters and charging cables
Technology Product series
1 Fuse 443, 215, 373
2
N-channel
MOSFET
X2-class
3
TVS diode P6KE, P6SMB
Schottky diode MBR
4 setP™1 SETP0805-100-CC
1The setP™ solution is recommended for USB Type C
port protection. Use Low Rho SMD Series for USB Type-A
and USB Type-B
Legend:
Power Line
Signal Line
Feedback
and PWM
oscillator
Step-down
transformer
High-
frequency
converter
and
clamp
2
Input
protection,
rectifier, and
filter
1
Output
protection,
rectifier, and
filter
USB Type C
controller and
power switch
3
USB Type C
(Port
protection)
4
A
Power
adapter
Click on the product series in
the table below for more info
AC
mains
USB Plug
4
B
Charging
cable
To
peripherals
USB Plug
4
6Littelfuse, Inc. © 2020 6
Power adapter:
benefits and features of Littelfuse components
Technology Function in application Product series Benefits Features
1 Fuse
Protects the power stage from
overcurrent events
443, 215, 373
Surface mount option, reduces customer
qualification time by complying with
regulatory safety standards, such as
UL/IEC
Compliant with UL/IEC standards; low
internal resistance; surface mount option;
vibration resistant
2
N-channel
MOSFET
High frequency switching for
power conversion
X2-class Higher efficiency and space saving Low on-resistance and low gate charge
3
TVS diode
Protects the power unit from
voltage transients that are
induced by lightning and voltage
transient events
P6KE, P6SMB
Improves system reliability by protecting
components from transients on power lines
600 W peak pulse capability; fast response
time (<1 ps); compatible with the high reflow
temperature profile (260° C, 40 s)
Schottky diode
Provides rectification and blocking
in power supply units
MBR Improves power supply efficiency
Low forward voltage drop;
high-frequency operation;
high junction temperature capability
4 setP™*
Helps protect USB-C connectors
from overheating
SETP0805-100-CC
Helps improve reliability and user
experience by reducing the risk of thermal
damage; simple integration into existing
USB-C systems
Fast response to thermal events; small form
factor; zero IR loss contribution; protects
systems with a 100 W or higher
power rating
* - setP™ solution is recommended for USB Type C port protection.
Click on the product series in
the table below for more info
7Littelfuse, Inc. © 2020 7
Component recommendations
for wireless charging pads
DC input
from adapter
Technology Product series
1a
Fuse 435, 438GT, 0402SFF
TVS Diode SMCJ, SMF, SMBJ
1b
setP™ SETP0805-100-CC
Diode Array SP3522, SPHV24
Acronyms:
TVS: transient voltage suppressor
MCU: microcontroller unit
ESD: electrostatic discharge suppressor
Notes:
1a: DC jack or
1b: The USB-C port; setP™ solution is suitable for USB Type C
port protection (generally, only one DC-input option is
implemented in a unit).
C Charging Pad
High
frequency gate
driver
Bridge
inverter
Legend:
Power Line
Signal Line
DC input
USB
input
1a
1bC-C signal line
for USB-C
connector
DC-DC
converter
To mobile
device
Click on the product series in
the table below for more info
MCU
Wireless
power
transmitter IC
CP
8Littelfuse, Inc. © 2020 8
Wireless charging transmitter:
components benefits and features
Technology Function in application Product series Benefits Features
1a
Fuse
Protects the power stage from
overcurrent events
435, 438GT,
0402SFF
Reduces customer qualification time by
complying with UL/IEC; compact design
Surface mountable; compatible with lead-
free solder process, as per IEC standards
TVS Diode
Protects sensitive electronic
components from voltage
transients
SMCJ, SMF, SMBJ
Improves system reliability by clamping the
voltage at safe levels during transients
1500 W peak pulse capability; compatible
with the lead-free solder reflow temperature
profile
1b
setP™
Thermal indicator to protect
USB-C plugs and receptacles from
overheating
SETP0805-100-CC
Helps improve reliability and user
experience by reducing the risk of thermal
damage; simple integration into existing
USB-C systems
Fast response to thermal events; small form
factor; zero IR loss contribution; protects
systems with a 100 W or higher power rating
Diode Array
Protects the USB-C chipset from
ESD events on data lines
SP3522 Compact design; reduces assembly time
Low capacitance; complies with IEC
standards; small form factor
Helps protect equipment from
user-induced ESD on the
power line
SPHV24
Improves system reliability by clamping the
voltage at safe levels during transients on
power lines
Low clamping voltage; low leakage current;
bidirectional
Click on the product series in
the table below for more info
9Littelfuse, Inc. © 2020 9
Select standards for wireless chargers
Standard Title General Scope Region
USB-IF Universal Serial Bus specification
Supports advancement and adoption of Universal Serial Bus
technology
Global
IEC 60950-1 Information technology equipment – Safety
Applicable to mains-powered or battery-powered information
technology equipment, with a rated voltage not exceeding 600 V
Global
IEC 62368-1
(IEC 60950)
Audio/video, information and communication
technology equipment – Part 1: Safety
requirements
Safety of equipment within the field of audio, video, information and
communication technology (rated voltage not exceeding 600 V)
Global
IEC 61000-4-2 Testing – Electrostatic Discharge (ESD)
This standard is made to check the capability of the equipment to
survive repetitive electrical fast transients and bursts
Global
IEC 61000-4-4 Electrical fast transient/burst immunity test
Evaluating the immunity of equipment when subjected to electrical
fast transient/bursts on supply, signal, control, and earth ports.
Global
IEC 61000-4-5 Surge immunity Evaluate the immunity of equipment when subjected to surges Global
Qi Qi Wireless Power Transfer System
Open interface standard defining wireless power transfer using
inductive charging
Global
10Littelfuse, Inc. © 2020 10
Additional information can be found on Littelfuse.com
Click on each
image to open the
catalog
setP™DesignGuide
PowerSemiconductor
SelectionGuide
11Littelfuse, Inc. © 2020 11
Stay in Touch with Littelfuse
Click below to subscribe to our email newsletter.
You’ll receive helpful resources and product information
tailored to your interests.
Subscribe Now
12Littelfuse, Inc. © 2020 12
Local resources supporting our global customers
Manaus
São Paulo
Fremont
Milpitas
Long Beach
Rapid City
Saskatoon
Burlington
Mount Prospect
Lake Mills
Chicago
Champaign
Beverly
Piedras Negras
Matamoros
Muzquiz
Charneca de Caparica
San Sebastian
Legnago
Beijing
Wuxi
Suzhou
Shanghai
Kunshan
Tsukuba
Tokyo
Seongham
Seoul
Chu-pei
Taguig
Lipa City
Taipei
Singapore
Dongguan
Hong Kong
Kaunas
Leiden
Amsterdam
Deventer
Sales
Legend
R&D
Manufacturing
Bremen
Lampertheim
Essen
Lauf
Chippenham
New Delhi
Round Rock
13Littelfuse, Inc. © 2020 13
Partner for tomorrow’s electronic systems
A global leader with a broad product
portfolio, covering every aspect of
protection, sensing, and control
Broad product portfolio
Our engineers partner directly with
customers to help speed up product
design and meet their unique needs
Application expertise
To help customers get products to the
market faster, we offer certification
testing to global regulatory standards
Testing capabilities
We help customers in the design
process to account for requirements
set by global regulatory authorities
Compliance & regulatory expertise
High-volume manufacturing that is
committed to the highest quality
standards
Global manufacturing
Our global customer service team is
with you to anticipate your needs and
ensure a seamless experience
Global customer service
Safer
Connected
Greener
14Littelfuse, Inc. © 2020 14
Littelfuse.com
This document is provided by Littelfuse, Inc. (“Littelfuse”) for informational and guideline purposes only. Littelfuse assumes no liability for errors or omissions in this document or
for any of the information contained herein. Information is provided on an “as is” and “with all faults” basis for evaluation purposes only. Applications described are for illustrative
purposes only and Littelfuse makes no representation that such applications will be suitable for the customer’s specific use without further testing or modification. Littelfuse
expressly disclaims all warranties, whether express, implied or statutory, including but not limited to the implied warranties of merchantability and fitness for a particular purpose,
and non-infringement. It is the customer’s sole responsibility to determine suitability for a particular system or use based on their own performance criteria, conditions, specific
application, compatibility with other partts, and environmental conditions. Customers must independently provide appropriate design and operating safeguards to minimize any
risks associated with their applications and products. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics.

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Littelfuse Wireless Charging Capabilities

  • 1. Wireless Charger Solutions Mobile and wearables REV0720 Users must independently evaluate the suitability of and test each product selected for their own specific applications. It is the User’s sole responsibility to determine fitness for a particular system or use based on their own performance criteria, conditions, specific application, compatibility with other parts, and environmental conditions. Users must independently provide appropriate design and operating safeguards to minimize any risks associated with their applications and products. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics.
  • 2. 2Littelfuse, Inc. © 2020 2 Consumer, medical, and industrial applications are creating a wave of wireless charging opportunities Portable medical device Phone Wireless Charger Mobile scanner E-toothbrush In-cabin Automotive Headphone Watch Coffee table
  • 3. 3Littelfuse, Inc. © 2020 3 Wireless charging: powering a more convenient world 0 100 200 300 400 500 600 700 800 2018 2019 2020 2021 2022 2023 Transmitters (e.g. Charging Pads) 0 200 400 600 800 1000 1200 1400 1600 2018 2019 2020 2021 2022 2023 Receivers (e.g. Smartphones) Quality living Source: IHS Markit Market trends and drivers  User convenience is driving consumer applications  Fewer cables allow for cleaner, less cluttered surfaces  Charging ports can become collection points for dust, dirt, and debris, which can cause overheating faults  Consumer devices, such as phones and watches, are driving market growth  Medical and industrial applications are adopting wireless charging  Automotive in-cabin charging for consumer devices is increasingly being added to vehicular models  Consumer product market leaders have standardized inductive charging to the Qi standard, allowing for further market adoption  Inductive wireless charging is popular for low-power needs (<70 W), as in consumer devices  Magnetic resonant wireless charging will help drive additional use-cases like charging a vehicle Ingenico and Verifone comprise 80% of global transactions % CAGR Inductive wireless charging unit shipments
  • 4. 4Littelfuse, Inc. © 2020 4 Components recommendations for wireless chargers Acronyms: TVS: transient voltage suppressor Charging pad  Fuse  TVS Diode, Diode Array  setP™* Power adapter  Fuse  TVS Diode  N-channel MOSFET  Barrier rectifier diode  setP™* *For use with a USB Type C adapter Charging cable  setP™* Protect Control Sense
  • 5. 5Littelfuse, Inc. © 2020 5 Component recommendations for power adapters and charging cables Technology Product series 1 Fuse 443, 215, 373 2 N-channel MOSFET X2-class 3 TVS diode P6KE, P6SMB Schottky diode MBR 4 setP™1 SETP0805-100-CC 1The setP™ solution is recommended for USB Type C port protection. Use Low Rho SMD Series for USB Type-A and USB Type-B Legend: Power Line Signal Line Feedback and PWM oscillator Step-down transformer High- frequency converter and clamp 2 Input protection, rectifier, and filter 1 Output protection, rectifier, and filter USB Type C controller and power switch 3 USB Type C (Port protection) 4 A Power adapter Click on the product series in the table below for more info AC mains USB Plug 4 B Charging cable To peripherals USB Plug 4
  • 6. 6Littelfuse, Inc. © 2020 6 Power adapter: benefits and features of Littelfuse components Technology Function in application Product series Benefits Features 1 Fuse Protects the power stage from overcurrent events 443, 215, 373 Surface mount option, reduces customer qualification time by complying with regulatory safety standards, such as UL/IEC Compliant with UL/IEC standards; low internal resistance; surface mount option; vibration resistant 2 N-channel MOSFET High frequency switching for power conversion X2-class Higher efficiency and space saving Low on-resistance and low gate charge 3 TVS diode Protects the power unit from voltage transients that are induced by lightning and voltage transient events P6KE, P6SMB Improves system reliability by protecting components from transients on power lines 600 W peak pulse capability; fast response time (<1 ps); compatible with the high reflow temperature profile (260° C, 40 s) Schottky diode Provides rectification and blocking in power supply units MBR Improves power supply efficiency Low forward voltage drop; high-frequency operation; high junction temperature capability 4 setP™* Helps protect USB-C connectors from overheating SETP0805-100-CC Helps improve reliability and user experience by reducing the risk of thermal damage; simple integration into existing USB-C systems Fast response to thermal events; small form factor; zero IR loss contribution; protects systems with a 100 W or higher power rating * - setP™ solution is recommended for USB Type C port protection. Click on the product series in the table below for more info
  • 7. 7Littelfuse, Inc. © 2020 7 Component recommendations for wireless charging pads DC input from adapter Technology Product series 1a Fuse 435, 438GT, 0402SFF TVS Diode SMCJ, SMF, SMBJ 1b setP™ SETP0805-100-CC Diode Array SP3522, SPHV24 Acronyms: TVS: transient voltage suppressor MCU: microcontroller unit ESD: electrostatic discharge suppressor Notes: 1a: DC jack or 1b: The USB-C port; setP™ solution is suitable for USB Type C port protection (generally, only one DC-input option is implemented in a unit). C Charging Pad High frequency gate driver Bridge inverter Legend: Power Line Signal Line DC input USB input 1a 1bC-C signal line for USB-C connector DC-DC converter To mobile device Click on the product series in the table below for more info MCU Wireless power transmitter IC CP
  • 8. 8Littelfuse, Inc. © 2020 8 Wireless charging transmitter: components benefits and features Technology Function in application Product series Benefits Features 1a Fuse Protects the power stage from overcurrent events 435, 438GT, 0402SFF Reduces customer qualification time by complying with UL/IEC; compact design Surface mountable; compatible with lead- free solder process, as per IEC standards TVS Diode Protects sensitive electronic components from voltage transients SMCJ, SMF, SMBJ Improves system reliability by clamping the voltage at safe levels during transients 1500 W peak pulse capability; compatible with the lead-free solder reflow temperature profile 1b setP™ Thermal indicator to protect USB-C plugs and receptacles from overheating SETP0805-100-CC Helps improve reliability and user experience by reducing the risk of thermal damage; simple integration into existing USB-C systems Fast response to thermal events; small form factor; zero IR loss contribution; protects systems with a 100 W or higher power rating Diode Array Protects the USB-C chipset from ESD events on data lines SP3522 Compact design; reduces assembly time Low capacitance; complies with IEC standards; small form factor Helps protect equipment from user-induced ESD on the power line SPHV24 Improves system reliability by clamping the voltage at safe levels during transients on power lines Low clamping voltage; low leakage current; bidirectional Click on the product series in the table below for more info
  • 9. 9Littelfuse, Inc. © 2020 9 Select standards for wireless chargers Standard Title General Scope Region USB-IF Universal Serial Bus specification Supports advancement and adoption of Universal Serial Bus technology Global IEC 60950-1 Information technology equipment – Safety Applicable to mains-powered or battery-powered information technology equipment, with a rated voltage not exceeding 600 V Global IEC 62368-1 (IEC 60950) Audio/video, information and communication technology equipment – Part 1: Safety requirements Safety of equipment within the field of audio, video, information and communication technology (rated voltage not exceeding 600 V) Global IEC 61000-4-2 Testing – Electrostatic Discharge (ESD) This standard is made to check the capability of the equipment to survive repetitive electrical fast transients and bursts Global IEC 61000-4-4 Electrical fast transient/burst immunity test Evaluating the immunity of equipment when subjected to electrical fast transient/bursts on supply, signal, control, and earth ports. Global IEC 61000-4-5 Surge immunity Evaluate the immunity of equipment when subjected to surges Global Qi Qi Wireless Power Transfer System Open interface standard defining wireless power transfer using inductive charging Global
  • 10. 10Littelfuse, Inc. © 2020 10 Additional information can be found on Littelfuse.com Click on each image to open the catalog setP™DesignGuide PowerSemiconductor SelectionGuide
  • 11. 11Littelfuse, Inc. © 2020 11 Stay in Touch with Littelfuse Click below to subscribe to our email newsletter. You’ll receive helpful resources and product information tailored to your interests. Subscribe Now
  • 12. 12Littelfuse, Inc. © 2020 12 Local resources supporting our global customers Manaus São Paulo Fremont Milpitas Long Beach Rapid City Saskatoon Burlington Mount Prospect Lake Mills Chicago Champaign Beverly Piedras Negras Matamoros Muzquiz Charneca de Caparica San Sebastian Legnago Beijing Wuxi Suzhou Shanghai Kunshan Tsukuba Tokyo Seongham Seoul Chu-pei Taguig Lipa City Taipei Singapore Dongguan Hong Kong Kaunas Leiden Amsterdam Deventer Sales Legend R&D Manufacturing Bremen Lampertheim Essen Lauf Chippenham New Delhi Round Rock
  • 13. 13Littelfuse, Inc. © 2020 13 Partner for tomorrow’s electronic systems A global leader with a broad product portfolio, covering every aspect of protection, sensing, and control Broad product portfolio Our engineers partner directly with customers to help speed up product design and meet their unique needs Application expertise To help customers get products to the market faster, we offer certification testing to global regulatory standards Testing capabilities We help customers in the design process to account for requirements set by global regulatory authorities Compliance & regulatory expertise High-volume manufacturing that is committed to the highest quality standards Global manufacturing Our global customer service team is with you to anticipate your needs and ensure a seamless experience Global customer service Safer Connected Greener
  • 14. 14Littelfuse, Inc. © 2020 14 Littelfuse.com This document is provided by Littelfuse, Inc. (“Littelfuse”) for informational and guideline purposes only. Littelfuse assumes no liability for errors or omissions in this document or for any of the information contained herein. Information is provided on an “as is” and “with all faults” basis for evaluation purposes only. Applications described are for illustrative purposes only and Littelfuse makes no representation that such applications will be suitable for the customer’s specific use without further testing or modification. Littelfuse expressly disclaims all warranties, whether express, implied or statutory, including but not limited to the implied warranties of merchantability and fitness for a particular purpose, and non-infringement. It is the customer’s sole responsibility to determine suitability for a particular system or use based on their own performance criteria, conditions, specific application, compatibility with other partts, and environmental conditions. Customers must independently provide appropriate design and operating safeguards to minimize any risks associated with their applications and products. Read complete Disclaimer Notice at littelfuse.com/disclaimer-electronics.