The integrated half-bridge gate driver is capable of driving high-side and low-side N-channel MOSFETs. It features slew rate control to adjust sink/source current and balance efficiency and EMI optimisation in the design of wireless charging transmitter (TX) circuits. The coil driver is intended for use in wireless charging TX circuits in drones, cordless power tools and vacuum cleaners as well as consumer electronic equipment with full-bridge topology and a resonant tank circuit for power conversion efficiency.

The integrated package is also claimed to reduce component count by up to 40% compared to traditional approaches. It enables PCB space savings and higher performance in wireless transmitter circuits at up to 30W. Protection functions include high side and low side under-voltage lockout (UVLO) and over-temperature protection. The device can be used for a range of input voltages from 4V to 28V.

“Wireless charging is offered at increasingly higher power levels as the benefits of eliminating physical connectors and cables are being realized by more end applications, said Colin Huang, power IC marketing manager at Alpha and Omega Semiconductor (AOS). The coil driver products  “provide an efficient, power-dense, and cost-effective solution for wireless charging TX circuits. The integrated approach offers protection features not possible by using a discrete approach while reducing engineering design cycles and complexities,” he added.

The AOZ32033AQI is immediately available in production quantities with a lead-time of 12 weeks.