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SILVERTEL makes wireless power – simple!

2014-04-08  Semiconductor ICs   SILVERTEL

Just add coils. It’s that simple.

Wireless power is rapidly becoming a significant growth area, utilised in a surprising variety of applications. Volume growth is being driven by consumer appetite for battery powered portable electronic devices and the inconvenience of keeping them charged. As the rollout of devices capable of wireless charging continues to grow, wireless power will soon become an expected feature of modern devices and products.

SILVERTEL has launched its’ first modules in a new range designed to make introduction of wireless power and charging products simple. The new modules are based on the widely accepted and increasingly adopted Qi standard released by the Wireless Power Consortium back in 2009. Released as a complementary transmit and receive power pair, the Ag311 and Ag301 modules are designed for Qi compliance and interoperability.

Qi based wireless power transfer works on the principle of magnetic induction, where two closely coupled coils transfer power between each other. It’s the same principle that battery powered rechargeable electric toothbrushes have worked on for years! The coils can be aligned by simple placement (A10 type) or magnetically aligned (A1 type) for easy placement.

SILVERTEL offers a solution that delivers all the benefits of wireless power, including improved safety, with no cables or exposed contacts, in two easy to integrate modules. Full evaluation kits for both transmit and receive modules, including coils, as in the picture (Ag311 Eval), are readily available to trial and test this new exciting technology.

These modules are capable of delivering up to 5W of power to the receiver side, as per the first release Qi standard. SILVERTELs modules are ideal for medical, industrial, scientific or commercial applications requiring a robust wireless charging design that is easy and quick to implement. Plans are already in place for higher power versions of Qi, starting with a 15W solution and moving on to a 120W solution.

SILVERTEL’s Ag311 wireless power transmitter is based on a Qi type A1/A10 half-bridge based solution, single coil with or without an aligning magnet arrangement, requiring a standard 19V input to the transmitter module. SILVERTELs modules are high efficiency space optimised solutions. The receiver module provides a low ripple, low noise regulated output. Overload and short-circuit output protection are built-in. The Ag301 Receiver module provides a 5V regulated output voltage with a current rating of 1A, ideal for supplying the charging circuits of numerous portable devices.

Wireless charging is perfect for hazardous, humid or dirty environments where frequent maintenance is an issue. Standards based charging also removes the need for device specific power supplies. The module is designed for simple integration, requiring the addition of just a few extra components. The controller IC is also available for very high volume applications.

About the Qi standard

The idea behind Qi is simple: all devices with the Qi logo will work with all Qi chargers. That’s it. No need for separate chargers, no need for cables, and no need for adapters when travelling. Qi is a global standard – this means that your device can be charged wirelessly wherever you are.

Qi is the proven leader in wireless charging. Qi has unrivalled reach, delivers the best user experience, and is moving the fastest to bring new wireless charging innovations to market.

About Qi and the Wireless Power Consortium

Established in December 2008, the Wireless Power Consortium’s mission is to establish Qi as the global standard for wirelessly charging electronic products. The more than 180 members of WPC include industry leaders in mobile phones, consumer electronics, batteries, semiconductors, components, wireless power technology and infrastructure such as wireless operators, furniture and automotive parts companies. Qi products are available in the United States, Asia Pacific, and Europe.

Samples and Evaluation boards are available from CODICO.

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