Wireless Charger Solutions - Mobile and wearables - Littelfuse
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Wireless Charger
Solutions
Mobile and wearables
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.
REV0720
Consumer, medical, and industrial applications are
creating a wave of wireless charging opportunities
Phone
E-toothbrush
Mobile scanner
Watch
Wireless
Charger
Coffee table
In-cabin Automotiv e
Portable medical dev ice Headphone
Littelfuse, Inc. © 2020 2
Wireless charging: powering a more convenient world
Market trends and drivers % CAGR Inductive
Ingenico wireless comprise
and Verifone charging unit
80%shipments
Qualityofliving
global
transactions
▪ User convenience is driving consumer applications Transmitters
(e.g. Charging Pads)
▪ Fewer cables allow for cleaner, less cluttered surfaces
▪ Charging ports can become collection points for dust, dirt, and debris, 800
700
which can cause overheating faults 600
500
400
▪ Consumer devices, such as phones and watches, are driving 300
market growth 200
100
▪ Medical and industrial applications are adopting wireless charging 0
▪ Automotive in-cabin charging for consumer devices is increasingly 2018 2019 2020 2021 2022 2023
being added to vehicular models
Receiv ers
(e.g. Smartphones)
▪ Consumer product market leaders have standardized inductive 1600
1400
charging to the Qi standard, allowing for further market adoption 1200
1000
800
▪ Inductive wireless charging is popular for low-power needs (
Components recommendations for wireless chargers
Power adapter Charging cable Charging pad
⚫ Fuse ⚫ setP™* ⚫ Fuse
⚫ TVS Diode ⚫ TVS Diode, Diode Array
⚫ N-channel MOSFET ⚫ setP™*
⚫ Barrier rectifier diode
⚫ setP™*
Acronyms:
TVS: transient voltage suppressor
*For use with a USB Type C adapter
Littelfuse, Inc. © 2020 4
Protect Control Sense
Click on the product series in
Component recommendations for the table below for more info
power adapters and charging cables
Technology Product series
1 2 3 4
AC High- 1 Fuse 443, 215, 373
Input Output
mains protection, frequency USB Type C USB Type C
Step-down protection, To
converter controller and (Port N-channel
rectifier, and transformer rectifier, and peripherals 2 X2-class
and power switch protection) MOSFET
filter filter
clamp
TVS diode P6KE, P6SMB
3
Schottky diode MBR
Feedback
and PWM
oscillator 4 setP™1 SETP0805-100-CC
A Power
adapter
1The setP™ solution is recommended for USB Type C
Legend: port protection. Use Low Rho SMD Series for USB Type-A
Power Line 4 4 and USB Type-B
Signal Line
USB Plug USB Plug
Charging
B
cable
Littelfuse, Inc. © 2020 5Click on the product series in
Power adapter: the table below for more info
benefits and features of Littelfuse components
Technology Function in application Product series Benefits Features
Surface mount option, reduces customer Compliant with UL/IEC standards; low
Protects the power stage from qualification time by complying with
1 Fuse
overcurrent events 443, 215, 373
regulatory safety standards, such as
internal resistance; surface mount option;
vibration resistant
UL/IEC
N-channel High frequency switching for
2 MOSFET power conversion
X2-class Higher efficiency and space saving Low on-resistance and low gate charge
Protects the power unit from
600 W peak pulse capability; fast response
voltage transients that are Improves system reliability by protecting
TVS diode P6KE, P6SMB time (Click on the product series in
Component recommendations the table below for more info
for wireless charging pads
Technology Product series
CP
Fuse 435, 438GT, 0402SFF
Bridge 1a
DC input To mobile
inverter
from adapter device TVS Diode SMCJ, SMF, SMBJ
DC input 1a
setP™ SETP0805-100-CC
High
1b
DC-DC Diode Array SP3522, SPHV24
converter frequency gate
driver
USB Acronyms:
C-C signal line 1b TVS: transient voltage suppressor
input
for USB-C MCU: microcontroller unit
connector ESD: electrostatic discharge suppressor
Wireless Notes:
MCU power 1a: DC jack or
transmitter IC 1b: The USB-C port; setP™ solution is suitable for USB Type C
port protection (generally, only one DC-input option is
C Charging Pad
implemented in a unit).
Legend:
Power Line
Signal Line
Littelfuse, Inc. © 2020 7Click on the product series in
Wireless charging transmitter: the table below for more info
components benefits and features
Technology Function in application Product series Benefits Features
Protects the power stage from 435, 438GT, Reduces customer qualification time by Surface mountable; compatible with lead-
Fuse
overcurrent events 0402SFF complying with UL/IEC; compact design free solder process, as per IEC standards
1a Protects sensitive electronic 1500 W peak pulse capability; compatible
Improves system reliability by clamping the
TVS Diode components from voltage SMCJ, SMF, SMBJ with the lead-free solder reflow temperature
voltage at safe levels during transients
transients profile
Helps improve reliability and user
Thermal indicator to protect Fast response to thermal events; small form
experience by reducing the risk of thermal
setP™ USB-C plugs and receptacles from SETP0805-100-CC factor; zero IR loss contribution; protects
damage; simple integration into existing
overheating systems with a 100 W or higher power rating
USB-C systems
1b Protects the USB-C chipset from
SP3522 Compact design; reduces assembly time
Low capacitance; complies with IEC
ESD events on data lines standards; small form factor
Diode Array Helps protect equipment from Improves system reliability by clamping the
Low clamping voltage; low leakage current;
user-induced ESD on the SPHV24 voltage at safe levels during transients on
bidirectional
power line power lines
Littelfuse, Inc. © 2020 8Select standards for wireless chargers
Standard Title General Scope Region
Supports advancement and adoption of Universal Serial Bus
USB-IF Universal Serial Bus specification Global
technology
Applicable to mains-pow ered or battery-pow ered information
IEC 60950-1 Information technology equipment – Safety Global
technology equipment, w ith a rated voltage not exceeding 600 V
Audio/video, information and communication
IEC 62368-1 Safety of equipment w ithin the field of audio, video, information and
technology equipment – Part 1: Safety Global
(IEC 60950) communication technology (rated voltage not exceeding 600 V)
requirements
This standard is made to check the capability of the equipment to
IEC 61000-4-2 Testing – Electrostatic Discharge (ESD) Global
survive repetitive electrical fast transients and bursts
Evaluating the immunity of equipment w hen subjected to electrical
IEC 61000-4-4 Electrical fast transient/burst immunity test Global
fast transient/bursts on supply, signal, control, and earth ports.
IEC 61000-4-5 Surge immunity Evaluate the immunity of equipment w hen subjected to surges Global
Open interface standard defining w ireless pow er transfer using
Qi Qi Wireless Pow er Transfer System Global
inductive charging
Littelfuse, Inc. © 2020 9Additional information can be found on Littelfuse.com
Click on each
setP™ Design Guide
image to open the
Power Semiconductor
catalog
Selection Guide
Littelfuse, Inc. © 2020 10Local resources supporting our global customers
Bremen
Mount Prospect Lampertheim
Lake Mills Essen
Chicago Leiden
Lauf
Champaign Amsterdam
Deventer Beijing
Burlington Wuxi
Saskatoon
Suzhou
Kaunas
Shanghai
Chippenham Kunshan
Legnago
Tsukuba
Rapid City Tokyo
Beverly
Dongguan
Fremont Hong Kong Seongham
San Sebastian Seoul
Milpitas Round Rock Charneca de Caparica Taipei
Long Beach Chu-pei
Piedras Negras New Delhi Taguig
Matamoros Lipa City
Muzquiz Singapore
Manaus
São Paulo
Legend
Sales
R&D
Manufacturing
Littelfuse, Inc. © 2020 11Partner for tomorrow’s electronic systems
Broad product portfolio Compliance & regulatory expertise
A global leader with a broad product We help customers in the design
portfolio, covering every aspect of process to account for requirements
protection, sensing, and control set by global regulatory authorities
Safer
Application expertise Testing capabilities
Our engineers partner directly with To help customers get products to the
customers to help speed up product market faster, we offer certification
design and meet their unique needs testing to global regulatory standards
Connected
Greener
Global customer service Global manufacturing
Our global customer service team is High-volume manufacturing that is
with you to anticipate your needs and committed to the highest quality
ensure a seamless experience standards
Littelfuse, Inc. © 2020 12This 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.
Littelfuse.com
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