BQ50002ARHBR

The bq50002A device is a highly integrated wireless power transmitter analog front end (AFE) that includes all the analog components required to implement a 5V transmitter compliant with the Wireless Power Consortium (WPC) standard. The bq50002A device integrates a full-bridge power driver with MOSFETs, a variable-frequency oscillator, a dual-channel communication demodulator, a linear regulator, and protection circuits. The bq50002A device must be used in conjunction with the digital controller bq500511A to implement a compact two-chip wireless power transmitter solution. The bq500511A can safely engage Rx devices, receive communication packets transmitted by charging devices, and manage power transfer according to the WPC v1.2 specification. The system supports foreign object detection (FOD) by continuously monitoring the transmitted power and comparing it with the received power reported by the receiver. This function prevents power loss caused by the incorrect placement of metal objects in the wireless power transfer field. To this end, the bq50002A uses a current-sensing amplifier to accurately measure the input DC current. If any abnormal conditions occur during power transfer, the bq500511A will handle them and provide an indication output. The comprehensive status and fault monitoring features enable the design of a low-cost, robust wireless power system certified by the WPC. The bq50002A is available in a 5.00mm×5.00mm 32-pin thermally enhanced quad flat no-lead (QFN) package.

Applications

• Wireless transmitter compliant with WPC standard for smartphones and wearable applications
• Dedicated wireless chargers and transmitters
• Medical and wearable applications

Key features

• 5V transmitter AFE compliant with WPC v1.2 A11 low-power transmitter specification, designed for use with the bq500511A WPC controller
• Suitable for WPC and 5V dedicated wireless power transmitters
• Supports 5W receiver output power
• Integrates all required analog functions for wireless power transmitters
• MOSFET drivers and synchronous N-channel power FETs
• Precision current sensing
• Variable frequency oscillator
• High-efficiency voltage regulator
• High-sensitivity demodulator for receiver signal decoding
• Dual-chip solution enabling transmitter design with efficiency exceeding 75%
• Ultra-low standby power consumption, even during digital Ping (<30mW)
• Dynamic Power Limiting (DPL)™ for normal operation from power-limited input sources
• System LED indication for charging and fault status
• Precise Foreign Object Detection (FOD) methodology