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Qi-compliant Products for Wireless Charging
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Mouser Electronics is stocking Qi-compliant products in support of the movement toward global standards for interoperability between wireless power transmitters and wireless power receivers.
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Qi Overview
The continual surge of wireless products into the market has created both convenience and a tangle of charging cables and connectors. While we love the freedom of wireless technologies, we are still tied to ugly charging wires. To make matters worse, we usually have a specific charging requirement for every wireless device that we use, creating a drawer full of cables, transformers, adapters, and connectors.
Qi technology is improving the wireless charging method by removing the cables. The fact is that power transfer can be accomplished over short distances without wires. The Wireless Power Consortium consists of independent companies that set international standards for interoperable wireless charging. The main idea is that wireless products designed with Qi-compliant parts will charge on other Qi charging stations, regardless of manufacturer, model, or country, thereby giving end users the confidence to purchase products bearing the Qi logo. In addition, it provides design engineers with an accepted set of interface specifications, freeing them to concentrate on product differentiation and competition.
How it works
Short distance power transmission is usually based on the principle of magnetic induction. Needed are two coils, a transmitter coil and a receiver coil. An alternating current in the transmitter coil generates a magnetic field which induces a voltage in the receiver coil. This voltage can be used to power a mobile device or charge a battery.
The coupling is determined by the distance between the inductors (z) and the relative size (D2 /D). The coupling is further determined by the shape of the coils and the angle between them (not shown).
Total energy consumption
Plugged-in battery chargers are typically left plugged-in continuously, thereby making standby power consumption significant. With the assumption that wireless battery chargers will also be left plugged-in, Qi has continually minimized standby power consumption. Wireless charging efficiency can be as high as 70% and possibly higher if high quality components are used. A wireless power transmitter can be more or less efficient than the wired chargers it replaces, depending on the number of wired chargers that are being replaced, the type of chargers, and the habits of the owner.
The efficiency of the power transfer depends on the coupling (k) between the inductors and their quality (Q). The losses can be expressed as:
and graphically shown as:
Electromagnetic Fields and Shielding
WPC Qi products use electromagnetic waves within the marked non-ionizing area of the electromagnetic spectrum. Non-ionizing means that the energy of those waves is too low to ionize human tissues.
IDT IDTP9030 / IDTP9020 Wireless Power
Transmitter and Receiver
Integrated Device Technology IDTP9030 is the industry's most highly integrated Qi-certified single-chip wireless power transmitter. IDT IDTP9030 wireless power transmitter IC has received full Qi certification by the Wireless Power Consortium (WPC). IDTP9030 wireless power transmitter is interoperable with any device meeting the WPC Qi standard, making this IDT single-chip IC ideal for designers of compact and cost-efficient Qi-compliant charging stations. Value-added proprietary features include advanced multi-layered Foreign Object Detection for safety, two-way secure authentication between base and mobile, and power delivery up to 7.5W for faster charging times.
Complementing the IDTP9030 transmitter is the IDTP9020 high-efficiency single-chip wireless power receiver. This IDT receiver integrates a high-efficiency synchronous full bridge rectifier, high efficiency synchronous buck converter, and control circuits used to modulate the load to transmit WPC compliant message packets to the transmitter station to optimize power delivery. Both the IDTP9030 and IDTP9020 are capable of multi-mode operation, supporting the Qi standard and proprietary formats. Built-in protocol detection enables dynamic switching between Qi and proprietary modes, creating seamless transitions and a trouble-free user experience. Evaluation kits are available for quick and easy evaluation of the IDTP9030 transmitter and IDTP9020 receiver.
IDTP9030 Features
- True single-chip for wireless power transmitter solutions
- 5W specification, with up to 7.5W power delivery in proprietary mode
- Fully Qi certified
- Multi-mode capable with dynamic switching capability
- Wide operating input voltage 10V to 20V
- Integrated high-efficiency half-bridge inverter
- Proprietary base-to-mobile communication for authentication
- Programmable option for added security and encryption up to 64-bit for 2-way authentication
- Total System Efficiency >73% when used with IDTP9020 Power Receiver IC
- DC-AC efficiency >90%
- DC-DC buck efficiency >90%
- Proprietary advanced multi-layered foreign object detection(FOD) for safety
- Over-temperature/voltage/current protection
- Compact 6x6-48 TQFN package
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IDTP9020 Features
- Highest-output-power single-chip solution for wireless power receivers
- Designed for WPC Qi 5W specification, with up to 7.5W power delivery in proprietary mode
- Multi-mode capable with dynamic switching capability
- Integrated synchronous buck converter
- Integrated USB adaptor switches for USB charging
- Total system efficiency >73% when used with IDTP9030 power transmitter IC
- AC-DC rectifier efficiency >90%
- DC-DC buck efficiency >90%
- Proprietary base-to-mobile communication for authentication
- Programmable option for added security and encryption up to 64-bit for 2-way authentication
- Proprietary advanced multi-layered foreign object detection (FOD) for safety
- Over temperature/voltage/current protection
- Compact 7x7mm 56-TQFN package
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IDTP9030 Block Diagram
IDTP9020 Block Diagram
Introduction to IDT Wireless Power IC Solutions (Inductive Charging)
IDT Wireless Power IDTP9020, IDTP9030 IC, and Evaluation Kit Overview
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TDK Wireless Charging Coils
TDK wireless charging coils for smart phones and other mobile devices employ a proprietary flexible thin metal magnetic sheet, achieving an industry-leading thickness of only 0.57mm. These TDK wireless power transfer coil units are ultra-thin, lightweight and highly resistant to shock. The design of the coils minimizes the tendency toward rising resistance and achieves a power transfer efficiency that meets the requirements of the WPC Qi standard. These TDK devices also have a low height and an output current of 0.5 to 0.6A.
Features
- Industry-leading thickness of 0.57mm
- Excellent Reliability:
- Ultra Thin
- Light-weight
- Highly resistant to shock
- Low height
- 05. to 0.6A output current
- Meets WPC "Qi" standard
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Applications
- Chargers for:
- Smartphones
- Digital cameras
- Bluetooth headsets
- And similar devices
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Texas Instruments BQ500210 Wireless Power Transmitter Manager
Texas Instruments BQ500211 Gen 2, Qi Compliant 5V Wireless Power Transmitter Manager
Texas Instruments BQ500211 Generation 2, Qi Compliant 5V Wireless Power Transmitter Manager is a second generation digital wireless power controller that integrates all functions required to control wireless power transfer to a single WPC compliant receiver. TI BQ500211 is designed for 5V systems and safely engages a WPC compliant device, receives packet communication from the powered device, and manages the power transfer. This TI wireless power transmitter manager maximizes flexibility in wireless power applications by featuring Dynamic Power Limiting (DPL). DPL enhances user experience by seamlessly optimizing the usage of power available from limited input supplies.
Features
- Intelligent Control of Wireless Power Transfer
- 5-V Operation Conforms to Wireless Power Consortium (WPC) Type A5 and Type A11 Transmitter Specifications
- Dynamic Power Limiting for USB and Limited Source Operation
- Digital Demodulation Reduces Components
- Comprehensive Charge Status Mode and Fault Indication
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Applications
- WPC 1.0.3 Compliant Wireless Chargers
- Mobile and Smart Phones
- Handheld Devices
- Hermetically Sealed Devices and Tools
- Cars and Other Vehicles
- Tabletop Charge Surfaces
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Functional Diagram
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TI BQ51013 Wireless Power Supply Receivers
Texas Instruments bq51013 Qi compliant wireless power supply receivers are advanced, integrated receiver ICs for wireless power transfer in portable applications. TI bq51013 wireless power supply receivers provide the AC/DC power conversion while integrating the digital control required to comply with the Qi v1.0 communication protocol. Together with the bq500110 transmitter controller, the bq51013 enables a complete contact-less power transfer system for a wireless power supply solution. TI bq51013 wireless power supply receivers provide 93% overall peak AC-DC efficiency. These TI devices are designed for use in a variety of applications, including WPC compliant receivers, cell phones and smart phones, headsets, digital cameras, portable media players, and hand-held devices.
Features
- Integrated Wireless Power Receiver Solution with a 5V Regulated Supply
- 93% Overall Peak AC-DC Efficiency
- Full Synchronous Rectifier
- WPC v1.0 Compliant Communication Control
- Output Voltage Conditioning
- Only IC Required Between RX coil and 5V DC Output Voltage
- Dynamic Rectifier Control for Improved Load Transient Response
- Supports 20-V Maximum Input
- Low-power Dissipative Rectifier Overvoltage Clamp (VOVP = 15V)
- Thermal Shutdown
- Single NTC/Control Pin for Optimal Safety and I/O Between Host
- Stand-alone Digital Controller
- 1.9 × 3mm DSBG or 4.5 × 3.5mm QFN Package
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Applications
- WPC Compliant Receivers
- Cell Phones, Smart Phones
- Headsets
- Digital Cameras
- Portable Media Players
- Hand-held Devices
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Functional Diagram
Application Circuit
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TI BQ51013A Wireless Power Supply Receivers
Texas Instruments bq51013A Integrated Wireless Power Receiver Solution is an advanced, integrated, receiver IC for wireless power transfer in portable applications. TI bq51013A features dynamic efficiency scaling for optimized performance over any range of output power and adaptive communication limit for robust communication during high levels of load current noise. This TI receiver IC provides the AC/DC power conversion while integrating the digital control required to comply with the Qi v1.0 communication protocol. Together with the bq500210 transmitter controller, bq51013A enables a complete contact-less power transfer system for a wireless power supply solution. TI bq51013A wireless power supply receiver provides 93% overall peak AC-DC efficiency.
Features
- Integrated Wireless Power Receiver Solution with a 5V Regulated Supply
- 93% Overall Peak AC-DC Efficiency
- Full Synchronous Rectifier
- WPC v1.0 Compliant Communication Control
- Output Voltage Conditioning
- Only IC Required Between RX coil and 5V DC Output Voltage
- Dynamic Rectifier Control for Improved Load Transient Response
- Dynamic Efficiency Scaling for Optimized Performance Over any Range of Output Power
- Adaptive Communication Limit for Robust Communication During High Levels of Load Current Noise
- Supports 20V Maximum Input
- Low-power Dissipative Rectifier Overvoltage Clamp (VOVP = 15V)
- Thermal Shutdown
- Single NTC/Control Pin for Optimal Safety and I/O Between Host
- Stand-alone Digital Controller
- 1.9 × 3mm DSBG or 4.5 × 3.5mm QFN Package
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Applications
- WPC Compliant Receivers
- Cell Phones, Smart Phones
- Headsets
- Digital Cameras
- Portable Media Players
- Hand-held Devices
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Functional Diagram
Application Circuit
TI bq5105x Wireless Power Receiver
Texas Instruments bq5105x Wireless Power Receiver with Li-Ion/Li-Pol Battery Charge Controller for portable applications provides efficient AC/DC power conversion, integrates a digital controller required to comply with Qi v1.1 communication protocol, and includes all necessary control algorithms needed for efficient and safe Li-Ion and Li-Pol battery charger. TI bq5105x wireless power receiver together with bq500210 transmitter-side controller enables a complete wireless power transfer system for direct battery charger solution. By utilizing near-field inductive power transfer, the receiver coil embedded in the portable device can pick up the power transmitted by transmitter coil. The AC signal from the receiver coil is then rectified and conditioned to apply power directly to the battery.
Features
- Single-Stage Wireless Power Receiver and Li-Ion/Li-Pol Battery Charger
- Combines Wireless Power Receiver, Rectifier and Battery Charger in a Single Small Package
- 4.2V and 4.35V Output Voltage Options
- Supports up to 1.5A Charging Current
- 93% Peak AC-DC Charging Efficiency
- Robust Architecture
- 20V Maximum Input Voltage Tolerance, with Input OV Protection Clamp
- Thermal Shutdown and Over Current Protection
- Temperature Monitoring and Fault Detection
- Compatible with WPC v1.1 “Qi” Industry Standard
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Applications
- Battery Packs
- Cell Phones, Smart Phones
- Headsets
- Portable Media Players
- Other Hand-Held Devices
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Block Diagram
Vishay / Dale IWAS Wireless Charging & Receiving Coil/Shield
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First commercial wireless receiver coil for Qi-compliant devices!
Vishay / Dale IWAS Series Wireless Charging Receiving Coil/Shield offers the first commercially available wireless receiver coil for the WPC (Wireless Power Consortium) compliant devices. The Vishay / Dale IWAS Series Wireless Charging Receiving Coil/Shield provides 70% or greater efficiency and high permeability shielding for wireless charging receiving coils, and blocks charging flux from sensitive components or batteries. The IWAS Series Wireless Charging Receiving Coil/Shield performance is not adversely affected by permanent locating magnets.
New!
Vishay / Dale has expanded the IWAS Qi Wireless Charging Receiving Coil/Shield Series to include the IWAS-3827EC-50 option designed for Rx applications up to 10W and optimized for 5V charging circuitry.
View Part Number
Features
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Wireless charging receiving coil
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High permeability shielding for wireless charging receiving coils
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Blocks charging flux from sensitive components or batteries
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High saturation powered iron - not affected by permanent locating magnets
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Durable construction
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Compliant to RoHS Directive 2002/95/EC
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Shield Material Characteristics
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Permeability: to 24
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Resistivity: > 10 MΩ at 100 V
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Core loss: 4000 mW/cc at 500 gauss, 250 kHz
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Magnetic saturation: 50 % at 4000 gauss (to 350 Oe)
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View Product List
Additional Resources
TI Transmitter IC:
BQ500210
BQ500210EVM-689
TI Receiver IC:
BQ51011
BQ51013AEVM
IWAS-3827EC-50 Datasheet
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Wurth Electronics Wireless Power Charging Coils
The only manufacturer with both
a Qi transmit coil and a Qi receive coil on the market!
Wurth Electronics Qi standard compliant Wireless Power Charging Coils
allow power to be transferred wirelessly through inductive coupling at a short range (typically a few millimeters). In a Qi wireless charging system, a transmit coil and receive coil are inductively coupled, meaning the AC current in the transmit coil generates a magnetic field which induces a voltage in the receive coil to power a device. The magnetic field is highly concentrated between the coils so that users are only exposed to a small leakage field, which is further minimized by an EMI shield on the back of the coil. The coils are winded with high quality litz wire (instead of bifilar) that results in outstanding performance with the lowest DCRs and highest Q values. When used together, the transmit coil and receiver coil achieve an efficiency of up to 75%.
NEW! Wurth has added additional options to the Qi wireless power charging coil (WPC) product line.
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View Product List
Additional Resources
TI Transmitter IC:
BQ500210
BQ500210EVM-689
TI Receiver IC:
BQ51011
BQ51013AEVM
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On Semiconductor NMLU1210 Dual 20V N-Channel MOSFET
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ON
Semiconductor's NMLU1210 Dual 20V N-Channel MOSFET includes a dual 3.2A
Schottky Barrier Diode in a compact 4.0 x 4.0 x 0.5 mm µCool™ package.
Features of this N-Channel MOSFET include full-bridge rectifier block,
up to 3.2A operation, low RDS(on) MOSFET to minimize conduction loss, low gate charge, low VF
schottky diode, and ultra low inductance package. Typical applications
include wireless charging, AC-DC rectification, and power management
applications for portable products such as cell phones, PMP, DSC, GPS
and many others.
Features
- Full−Bridge Rectifier Block
- Up to 3.2 A operation
- Low RDS(on) MOSFET to minimize conduction loss
- Low gate charge MOSFET
- Low VF Schottky diode
- Ultra Low Inductance Package
- This Device uses Halogen−Free Molding Compound
- These are Pb−Free Devices
Applications
- Wireless Charging
- AC−DC Rectification
- Optimized for Power Management Applications for Portable Products, such as Cell Phones, PMP, DSC, GPS, and others
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Typical Application Circuit
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