Wireless power transmitters suit wearables & phones

20th November 2014
Nat Bowers

Designed for next-gen wireless charging products, a family of magnetic induction wireless power transmitters has been announced by Integrated Device Technology. The P923x transmitters deliver greater flexibility and ease of use while reducing overall development cost through a high level of integration.

Low EMI and high efficiency make the devices suitable for a variety of applications, including wearables and smartphones.

The P9235 and P9236 transmitters are compliant with the latest WPC Qi standard, while the P9234 is a PMA-compliant device. IDT is also introducing a proprietary-mode device, the P9231, which operates at up to 1MHz of resonance frequency for a smaller coil. The P9230 is a dual-mode transmitter, supporting both WPC and PMA standards. Collectively, the P923x family addresses all of the various WPC low-power coil configurations.

Featuring an integrated 32-bit ARM Cortex-M0 processor, the P923x family offers a high level of programmability and flexibility while consuming ultra-low standby power to meet Energy Star requirements. The transmitters span input voltages ranging from 4.0 to 21V and target applications requiring 0.5-10W. The devices also offer a high level of integration, including all digital and analogue functions, which minimises the number of external components while reducing overall system cost.

Arman Naghavi, Vice President & General Manager, Analog and Power Division, IDT, comments: “Our customers are designing wireless power transmitters into a wide variety of applications such as mobile phone charging pad stations and wearable applications. This line of transmitters offers them greater programmability, ease of use and reduced overall development cost for faster product introduction.”

The P9235, a full-bridge, single coil device, compliant with WPC A5/A11, in a QFN5X5-40 package; and the P9236, a half-bridge, single and multi-coil configuration, in a QFN6X6-48 package, are available now.

The P9230, half-bridge dual-mode chip compliant with WPC A1/A10 and PMA type 3 configurations, the P9231 for proprietary mode applications including wearables, and the P9234 PMA-compliant transmitter will be available soon.

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