BQ50002 Datasheet, PDF (14/35 Pages) Texas Instruments – Low-Cost 5-V Wireless Power Transmitter Analog Front

bq50002
SLUSBW1A – OCTOBER 2015 – REVISED OCTOBER 2015
8 Application and Implementation
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NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The bq50002 device is a wireless power transmitter AFE designed for 5-W WPC compliant applications when
paired with the bq500511. The pair integrates all functions required to control wireless power transfer to a WPC
v1.2 compliant receiver. Several tools are available for the design of the system. See the product folder on
www.ti.com for more details. The following sections highlight some of the system design considerations.
5-V Input
bq500511
I²C
Digital Wireless
Power
bq50002 Analog
Front End
Controller
A11 Coil
Assembly
Figure 6. System Block Diagram
The I²C port is accessed by the FOD tuning tool and can provide a level of system monitoring and evaluation.
The SDA and SCL lines of the I²C bus must be pulled up (as shown in the Figure 7) if the I²C port is utilized.
They may be left floating if no I²C function is required. The logic reference generated by the bq50002 Analog
Front End is 3 V, so care should be taken to ensure that if the Master I²C device also has pull-up resistors to a
higher reference, that the the 3-V reference to the bq500511 is not affected. Specifically, only one set of pull-up
resistors should be populated, either on the I²C Master bus or on the bq500511 system board, but not both.
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