Wireless power chipset untethers tablets

2nd March 2015
Nat Bowers

Integrated Device Technology introduces a wireless power chipset designed to untether medium-sized electronic devices such as tablets and phablets. Complying with the WPC medium-power specification for magnetic induction charging, the P9240 transmitter and P9022A receiver operate together to deliver 10W of power.

The P9240 is a highly compact transmitter supporting up to 15W of power transfer. Featuring an integrated 32-bit ARM Cortex M0 processor, the transmitter’s high level of integration means a minimal number of external components are required, reducing engineering efforts and board space. The chip is housed in a compact 5x5mm package.

The P9240 is a wide input range transmitter chipset with an integrated step-down regulator. It features low standby current that meets Energy Star standards; proprietary slew rate control drivers that deliver best-in-class metrics for electromagnetic interference, allowing OEMs pass CISPR22 Class B tests with several dB margin; and simultaneous voltage and current demodulation for more robust receiver to transmitter communication. The transmitter supports I2C, SPI and UART serial interfaces.

The P9022A is a 10W wireless charging receiver that enables faster charging of tablets, phablets, and smart phones with large batteries. The integrated MCU provides flexible programmability and allows the use of all WPC-compliant medium-power receiver coils in end applications.  The receiver features an integrated synchronous full-bridge rectifier and a high-efficiency integrated synchronous buck converter.

The P9022A receiver has proprietary back channel communication, a two-way communication protocol feature that enables users to tailor operating performance, identification and authentication. The chip also provides improved foreign object detection for safety.

Arman Naghavi, Vice President, Analog Power Technology, IDT, commented: “The wireless power ecosystem is growing rapidly as innovative design teams seek to cut through the tangle of cords needed to power our electronics. This new chipset brings IDT’s uniquely flexible, compact wireless power capabilities to this mid-power class of electronics.”

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