The BQ51013B-Q1, when paired with a transmitter, allows for contactless power delivery using the Qi v1.2 protocol. The receiver has an overall peak AC to DC efficiency of 93% and a full synchronous rectifier. With dynamic rectifier control, dynamic efficiency limiting, foreign object detection (FOD), and an adaptive communication limit, the BQ51013B-Q1 makes the device designed for handheld devices that require an AEC-Q100 qualified wireless receiver.

To meet wireless power design requirements shown in Table 1-1, the BQ51013B-Q1 is configured with the following design requirements shown in Table 1-2.

To set the input current limit to 1 A, the device is calculated to have an R_ILIM of 118 Ohms with the recommended R_FODof 196 Ohms. The design allows for enabling or disabling wireless or wired power based on the configuration for EN1 and EN2. These pins can be set to a low logic or a high logic.

Figure 1-1 shows the wireless receiver portion of the design using a Wurth Elektronik wireless charger coil (part number: 760308103215) and fixed current limit of 1 A. The output of this receiver is used as the input to the Li-Ion charger: BQ25171-Q1.

Figure 1-1 Wireless Receiver Schematic: BQ51013B-Q1 - Power and ENx pins

Figure 1-2 Wireless Receiver Schematic: BQ51013B-Q1 - Passive components