IDT公司的P9222－R是集成的单片低功率高达5W的無線電源接收器(Rx).器件接收从无线功率发送器如P9235A-RB WPC Qi BPP无线发送器IC发送的AC功率信号,把它转换成整流输出电压,可以用来给各种无线功率应用的功率器件或给电池充电器输入供电.P9222-R接收器(Rx)集成了高效率同步全桥整流器(SFBR)和用来发送信息包到发送器(Tx)的控制电路,以达到最佳的电源传输.器件包括超温和欠压/过压保护,内部的过压箝位保护整流输出不能高于过压设定的电平,特别是接收器快速从低耦合位置变换到高耦合位置时.器件还集成了32位ARM® Cortex®-M0处理器,提供高水平的编程性和设计参数,它能通过I2C接口或外接的EEPROM进行配置.P9222-R在轻负载是效率高,非常适合于低功耗应用如耳塞充电.独到的Ping检测特性使用户很容易连接无线充电器,并在电池充电终止时提高了热性能,而低欠压锁住(UVLO)阈值使得接收器能在很弱的数字Ping强度信号就能起动.P9222-R主要用在无线耳塞充电,可穿戴和健美跟踪,移动设备和助听器充电.本文介绍了P9222-R主要特性,框图和应用框图,以及WPC v1.2.4兼容无线功率发送系统框图,無線功率評估板P9222-R-EVK主要特性,电路图,材料清单和PCB设计图.
The P9222-R is an integrated single-chip wireless power receiver IC (Rx) for up to 5W applications. The device receives an AC power signal from a wireless power transmitter, such as the P9235A-RB WPC Qi BPP Wireless Transmitter IC, and converts it to a rectified output voltage, which can be used to power devices or supply the battery charger input in a wide range of wireless power applications. The receiver (Rx) integrates a high-efficiency synchronous full bridge rectifier (SFBR) and control circuits used to send message packets to the transmitter (Tx) in order to optimize power delivery.
The P9222-R is highly efficient at light loads and very well-suited for low-power applications such as earbuds case charging. A unique Ping detect feature gives the user an early indication of the wireless charger connection and improves thermal performance at the end of complete battery charging. Low under-voltage lockout (UVLO) threshold allows the receiver to start up even with a weaker digital ping strength signal from a transmitter over an extended area.
The device includes over-temperature and under/over-voltage protection. The internal over-voltage clamping protects the rectifier output from rising above the overvoltage level when the receiver is quickly moved from a low-coupling position to a high-coupling position. The integrated 32-bit ARM® Cortex®-M0 processor (trademark of ARM, Ltd.) offers a high level of programmability and design parameters that can be easily configured through the I2C interface or an external EEPROM.
The P9222-R is available in a RoHS ultra-small WLCSP-40 package and it is rated for a 0 to 85℃ ambient operating temperature range.
The P9222-R-EVK Wireless Power Evaluation Board can be used to demonstrate the features and performance of the P9222-R 5W Wireless Power Receiver in low power 2.5W applications such as in earbuds charging cases. The P9222-R-EVK can also supply up to 5W power. IDT’s P9235A-RB-EVK Evaluation Board or any other Qi certified transmitter can be used as the power transmitter for P9222-R-EVK evaluation board testing.
The P9222-R-EVK demonstrates a high-efficiency, turnkey reference design and is supported by comprehensive online, digital resources to significantly expedite the design-in effort and enable rapid prototyping. The printed circuit board (PCB) has four layers. The total solution area (excluding coil) is approximately 70 mm2 out of which 37 mm2 is occupied by the components. A small 30×30mm power receiver coil is used in the design to meet small form-factor device requirements.
Using the P9222-R Windows GUI and the P9222-R-EVK, customers can quickly customize operating parameters for their applications. Operating parameters such as foreign object detection (FOD) parameters can be configured by either writing to internal SRAM registers via the I2C interface, or by loading the user configuration generated by the P9222-R Windows GUI into an external EEPROM. The P9222-R-EVK has an on-board external EEPROM and connectors to plug-in the USB to an I2C programming dongle.
P9222-R-EVK Evaluation board including the coil assembly