BQ51221YFPT

The BQ51221YFPT from Texas Instruments is a fully contained wireless power receiver IC capable of operating in both WPC and PMA protocols. This dual-mode capability allows wireless power systems to function with both WPC and PMA inductive charging standards.

The device provides integrated power conversion, including rectification and regulation, along with digital control and communication for both standards. It features autonomous protocol detection, eliminating the need for additional active devices. The BQ51221YFPT complies with WPC v1.1 and PMA communication protocols, enabling a complete wireless power transfer system when paired with a primary-side controller.

Key design features include a robust 5-W solution with reduced losses for improved thermals, an inductorless receiver for a low height profile, and an adjustable output voltage range of 4.5 to 8 V for coil and thermal optimization. It boasts a fully synchronous rectifier with 96% efficiency and a 97% efficient post-regulator, achieving a 79% system efficiency at 5 W. The receiver also includes a patented transmitter pad detect function for an enhanced user experience and I2C communication with a host.

Packaged in a 42-DSBGA format, the BQ51221YFPT is designed for surface mount applications. It operates within a temperature range of -40°C to 85°C and requires a voltage input between 4V and 10V, drawing a quiescent current of 20µA.