This reference design is an integrated USB Type-C® power delivery (PD) and charging reference design for 1-5 cell batteries for applications such as power tool chargers, vacuum cleaners, portable power stations, so on and so forth.

The design incorporates a highly-integrated standalone TPS25750 USB Type-C and PD controller with a build-in fully-managed robust power path switch inside to reduce the size and number of external components. The power specification can easily be configured to the user's application through a web-based GUI, thus reducing the design complexity. The PD controller works with an external battery charger controller (BQ25731) through I2C communication. The BQ25731 supports a wide range input with a four-switch buck-boost configuration. The controller also supports a seamless transition from buck, boost, and buck-boost operation mode, thus providing a highly-efficient, highly-accurate and reliable charger. In addition to charging capabilities, the BQ25731 also supports USB OTG(On The Go) mode which adds benefits to the end-user experience. In general, this reference design can support charging batteries through a USB Type-C port and provide a maximum 60W output at OTG mode, the high integration and simple design will benefit low BOM(Bill of Material) cost, smaller size as well as accelerating time to market.

• Supports 1–5 cell battery charging
• High integration with an integrated power path switch and USB PD control
• Seamless transition among buck, buck-boost, and boost mode to optimize efficiency across a wide I/O range
• Supports OTG mode in source mode
• High efficiency > 97.3% at full load

• Cordless power tool
• Vacuum robot
• Appliances: Battery charger
• Cordless vacuum cleaner

Board Top View

Board Bottom View

Board Angle View

System Block Diagram