[原创] NXP NXQ1TXA5 5W智能手机无线充电解决方案

NXP公司的NXQ1TXA5是无线充电发送器,集成了功率控制,信号处理,片上电流和电压测量等功能,待机功耗小于10mW,符合Qi标准V1.1.2.除了Qi线圈和谐振电容,所需外接元件不到10个,PCB面积小于2平方厘米.主要用在5V(USB供电)无线充电座,小型无线充电器,以及Qi无线充电器和智能手机.本文介绍了NXQ1TXA5主要特性和优势,框图和Qi A5参考设计框图.

Designed for superior performance in size- and cost-optimized 5 V wireless chargers, the NXP NXQ1TXA5 wireless charging transmitter integrates everything from power control, signal processing, on-chip current and voltage measument up to a fullbridge output power stage, and achieves standby power ratings of less than 10 mW.

Exceptionally high integration and advanced functionality serve to reduce footprint and standby power consumption. In addition to the Qi coil and resonant capacitors, the NXQ1TXA5 requires less than ten external components. Low pincount enables the use of a very small, 32 pin HVQFN package (SOT617-3) of 5 x 5 mm with a 0.5 mm pitch. This small package size and fewer external components mean the design can use a less expensive PCB. The entire transmitter design can be implemented on a PCB area of less than 2cm2 (1/3 in2).
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