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.
| Output voltage options | PMP9668.1 | PMP9668.2 | PMP9668.3 | PMP9668.4 | PMP9668.5 | PMP9668.6 |
|---|---|---|---|---|---|---|
| Vin (Min) (V) | 21.6 | 21.6 | 21.6 | 4.5 | 4.5 | 4.5 |
| Vin (Max) (V) | 26.4 | 26.4 | 26.4 | 5.5 | 5.5 | 5.5 |
| Vout (Nom) (V) | 12.6 | 5 | 12 | 3.3 | 5 | 5 |
| Iout (Max) (A) | 10 | 4 | 2 | .1 | 2 | 2 |
| Output Power (W) | 126 | 20 | 24 | .33 | 10 | 10 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | DC | DC | DC | DC | DC | DC |
| Topology | Buck- Synchronous | Buck- Synchronous | Buck- Synchronous | Linear Regulator | USB Switch | USB Switch |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Download ready-to-use system files to speed your design process.
Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | PMP9668 Test Results | May 27, 2015 |
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