Easily Integrate Wireless Charging into
Portable Electronics
TI is a founding member of the WPC(Wireless Power Consortium) and has taken an active role in developing a robust wireless-power specification. TI has developed reliable solutions for both a power receiver and a power transmitter. The power receiver uses the bq51013. The power transmitter is based on the bq500110, which supports type A1 (single-coil) configurations. Both receiver and transmitter ICs are designed to be interoperable with other WPC-compliant solutions.
¡´ bq51013 Integrated Wireless Power Supply Receiver
¡@The world's smallest wireless power receiver solution
The bq51013 is an advanced, integrated, receiver IC for wireless power transfer in portable applications. The device provides the AC/DC power conversion while integrating the digital control required to comply with the WPC 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.
By utilizing near-field inductive power transfer, the receiver coil embedded in the portable device receives the power transmitted by the transmitter coil via mutually coupled inductors. The AC signal from the receiver coil is then rectified and regulated to be used as a power supply for down-system electronics. Global feedback is established from the secondary to the transmitter in order to stabilize the power transfer process via back-scatter modulation. This feedback is established by using the Qi v1.0 communication protocol supporting up to 5W applications.
The device integrates a low-impedance full synchronous rectifier, low-dropout regulator, digital control, and accurate voltage and current loops. The entire power stage (rectifier and LDO) utilize low resistive NMOS FET¡¦s to ensures high efficiency and low power dissipation.
Features:
¡´ Integrated wireless power receiver solution with a 5V regulated supply
¡@¡V 93% overall peak AC-DC efficiency
¡@¡V Full synchronous rectifier
¡@¡V WPC v1.0 compliant communication control
¡@¡V Output voltage conditioning
¡@¡V Only IC required between RX coil and 5V DC output voltage
¡´ Dynamic rectifier control for improved load transient response
¡´ Supports 20V max 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 x 3mm WCSP or 4.5 x 3.5mm QFN Package
Benefits:
¡´ Highly-integrated and efficient wireless power receiver IC includes full-bridge
¡@synchronous rectification, voltage conditioning and wireless power control in
¡@one single device.
¡´ 1.9-mm x 3-mm WCSP package allows for easy integration with minimal size
¡@impact. Device PCB area reduced by 80-percent from first generation receiver
¡@solution, bqTESLA100LP.
¡´ Wireless Power Consortium (WPC) Qi-compliance enables powering or charging
¡@from TI¡¦s transmitter solution, and any Qi-compliant transmitter in the market.
¡´ Built in protection against voltage, current and temperature fault conditions,
¡@assure a safe and reliable system operation.
¡´ 93% peak efficiency reduces thermal rise inside the system while allowing
¡@charge rates comparable to AC adapter.
¡´ bq500110 Qi Compliant Wireless Power Transmitter Manager
The bq500110 is the industry¡¦s first wireless power dedicated digital controller that integrates most of the logic functions required to control Wireless Power Transfer in a single channel WPC compliant contactless charging base station. The bq500110 is an intelligent device that periodically pings the surrounding environment for available devices to be powered; monitors all communication from the mobile device being wirelessly powered; adjusts power applied to the transmitter coil per feedback received from the powered device. The bq500110 also manages fault conditions associated with power transfer and controls the operating modes status indicator.
The bq500110 is also the first wireless power controller with parasitic metal object detection that in real time analyzes efficiency of the established power transfer and protects itself and the power receiver from excessive power loss and heat associated with parasitic metal objects placed in the power transfer path.
Features:
¡´ Intelligent control of the power transfer between base station and mobile device
¡´ Conforms to Version 1.0 of the Wireless Power Consortium (WPC) transmitter
¡@specifications
¡´ Demodulates and decodes WPC complaint message packets from the power
¡@receiving device over the same wireless link that transfers electrical power
¡´ Implements closed-loop power transfer PID control by modulating frequency of the
¡@voltage on the transmitting Coil
¡´ Parasitic Metal Object Detection (PMOD)
¡´ Operating modes status indicators
¡@¡V Standby
¡@¡V Power Transfer
¡@¡V Charge Complete
¡@¡V Fault
¡´ Overload and Over Temperature Protection
Applications:
¡´ Transmitter Pad for Contactless Charging.
¡´ Targeted for low-power (<5W) end equipments: cell phones, digital cameras,
¡@portable media players, remote/gaming controllers, Bluetooth headsets and
¡@other portable devices.
¡´ bqTESLA150LP Wireless Power Development Kit
The bqTESLA150LP low power wireless power evaluation kit from Texas Instruments is a high performance, easy-to-use development kit for the design of wireless power solutions. Consisting of a single-channel transmitter featuring the bq500110 along with 5V power supply receiver featuring the bq51013, the kit enables designers to speed development of their end applications. The bq51013 device is a highly integrated solution in a 1.9mm X 3mm chip scale package.
Few external parts are required which simplify design and minimizes solution area. With no additional software development required, bqTESLA allows for true plug-and-play functionality. The evaluation kit is designed for compatibility with the Qi Standard.
The kit includes the following:
¡´ bq51013 Wireless Power Receiver
¡´ bq500110 Wireless Power Transmitter Controller
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