This reference design includes a power management circuit which is capable of controlling a remote USB charging port in an automotive application environment. The circuit can be supplied directly from the car battery rail. It uses a small and highly efficient step down converter, the TPS62130A-Q1, to regulate the required USB bus voltage for charging with charge currents up to 2.5A.
The USB charging port is controlled and protected by using a USB charging controller, the TPS2549-Q1, this charging controller is also used to monitor the charge current for adjusting the output voltage of the TPS62130A-Q1. This way the voltage drop across the cable connection to the USB port is compensated. In addition, the TPS2549-Q1 generates all required signals to indicate a USB charging port to the equipment connected to the port.
| Output voltage options | PMP9765.1 |
|---|---|
| Vin (Min) (V) | 5 |
| Vin (Max) (V) | 40 |
| Vout (Nom) (V) | 5 |
| Iout (Max) (A) | 2.5 |
| Output Power (W) | 12.5 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Synchronous |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
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Design file that contains information on physical board layer of design PCB
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Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Technical article | A complete power solution for automotive USB ports | PDF | HTML | Apr. 12, 2016 | |
| Test report | PMP9765 Test Results | Jan. 19, 2016 |
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