Description

BQ24745 is a host controlled synchronous buck battery charger capable of charging batteries at up to 19.2V and up to 8 A normally: extended to 10 A with use of 8 mOhm battery sense resistor. The power train is capable of 8 A with convection only cooling and 10 A with moderate fan cooling (~200 LFM). The Test Report includes Thermal images for both cases. While the design shows a 28 pin MSP430 as the host: any processor with SMBus capability will work. A 5/12V 2A auxiliary converter using TPS54335: and 5V 4A with TPS40170 with 2x CSD18504 are provided. For the two USB ports: the design provides TPS2561A for power switching and TPS2513A for control. A linear TPS70933 provides the 3.3V for the MSP430 and interface signals. A rich Test Interface allows full testing of hardware in the absence of software and then provides multiple interface choices for software development.