Battery Power - Spring 2014 - (Page 21)

ICs & Semiconductors Toshiba Launches 5-Watt Chipset for Fast Wireless Charging Toshiba America Electronic Components, Inc. (TAEC), has announced enhancements to its TB6865FG power transmitter and TC7763WBG receiver chipset enabling wireless power transfer to more quickly charge mobile devices. The TAEC wireless power chipset now supports 5-watt power transfer. It is compatible with the Qi low-power specifications version 1.1 defined by the Wireless Power Consortium (WPC), including rigorous Foreign Object Detection (FOD) and has integrated digital controller logic that reduces component count and minimizes design complexity. "We are seeing a strong interest in wireless power technology for products like smartphones, game controllers and other portable devices," said Deepak Mithani, senior director of the Mixed Signal Business Unit, System LSI Group at TAEC. "Besides the advantage of charging a device without the use of a cable, one interesting and emerging application is for mobile waterproof gadgets where a device is fully enclosed in its housing with no exposed connectors. Customers are demanding a quick way to charge their portable electronics and this chipset provides a convenient and effective way to satisfy their demand." The TAEC wireless power chipset is built with the company's mixed-signal process with optimized MOSFET design that achieves high-performance allowing mobile device placement on the battery charging pad. The TC7763 is a wireless power solution with a transmitter that consists of the TB6865FG transmitter. The TB6865FG integrates an MCU and can drive four external MOSFET H Bridges of four coils for a free positioning architecture supporting two mobile devices. The TC7763WBG receiver combines modulation and control circuitry with a rectifier power pickup, built-in Linear Dropout Regulator (LDO) and circuit protection functions. The transmitter IC is housed in a LQFP-100 14 mm by 14 mm package and the receiver IC is supplied in a compact WCSP-28 2.4 mm by 3.67 mm by 0.5 mm package. The earlier TC7761WBG part has been awarded Qi certification at output power of 3.5 watt. The TAEC power transmitter and receiver chipset, TB6865FG and TB7763WBG, is currently sampling. One piece sample price of the TB6865FG power transmitter is $7.00 and the TB7763WBG receiver is $3.50. MediaTek Introduces Multimode Inductive and Resonance Wireless Charging Solution MediaTek has released a multimode receiver technology for inductive and resonant charging using in-band communications. MediaTek offers wireless charging technology with enhancewww.BatteryPowerOnline.com ments over previous solutions. Traditionally, wireless charging has been done through tightly coupled technology, commonly referred to as inductive. MediaTek's solution has adopted loosely coupled technology, commonly referred to as resonance and offers advantages over today's inductive approach. Along with the highly differentiated resonance solution MediaTek brings multimode receiver technology that enable users to charge their devices from existing inductive chargers or new resonance chargers. Mark Estabrook, director of Strategic Marketing at MediaTek, is anticipating an expanded ease of use and convenience for users turning to multimode resonant charging solutions. "Most analysts agree that the adoption of wireless power is being slowed by competing specifications," said Estabrook. "MediaTek has developed leading technology that will overcome those specification differences even across such different technologies as induction and resonance." According to Ryan Sanderson at IHS, a leading analyst in the field of wireless power, "2013 saw 20 million wireless charging receivers shipped into the market, the majority of which were integrated into mobile phones and tablets, enabling and supporting wireless charging straight out of the box. IHS forecasts this number to grow to 700 million by 2018." "From a business viewpoint, MediaTek's technology helps to ensure that capital investments already made in chargers for the home, office, retail and automotive markets will be protected, while providing the benefits of resonant charging with new resonant chargers," Estabrook said. "Users benefit from being able to charge on virtually any charger platform regardless of underlying technology employed." MediaTek's multimode receiver wireless power solution employs another technology and that is the use of in-band communications for power control in both the inductive and resonant modes. MediaTek's in-band communications provides reliable communications with greater simplicity and higher value than proposed Bluetooth implementations for resonance. MediaTek envisions an inclusive future where inductive and resonant wireless charging can be made interoperable on a global basis. "Industry leaders must work together to quickly adapt to the natural path of technology adoption in order to deliver a complete ecosystem compatible with every device. This is essential to gain the trust and deliver on the needs and wants of the consumer," said Estabrook. TI Unveils Transmitter Circuit with Foreign Object Detection for Qi Wireless Charging Stations Texas Instruments (TI) has introduced its next-generation wireless power transfer circuit with foreign object detection that will allow designers to bring to market three-coil, 5 V and 12 V A6 charging stations compliant with the Wireless Power Consortium (WPC) 1.1 specification. The bq500412 controller, which is shipping in volume production, requires half the components compared to other solutions. Giving smartphone users an improved charging experience, the bq500412 integrates all functions required to control Spring 2014 * Battery Power 21 http://www.BatteryPowerOnline.com

Table of Contents for the Digital Edition of Battery Power - Spring 2014

NREL Model Licensed to Improve Accuracy of Battery Simulations
Companies Collaborate to Make Wireless Power As Commonplace as WiFi
Improving the Coulombic Efficiency and Lifetime Of Li-Ion Cells Demands High Precision, High Accuracy Testing
Rapid Charging for Battery-Powered Portable Devices
Managing Fleet Batteries and Knowing When to Retire Them
Batteries
ICs & Semiconductors
Charging Systems
Industry News
Research & Development
Marketplace

Battery Power - Spring 2014