This reference design is a 28-V output, 5-A synchronous buck converter for space applications operating from a 50-V to 150-V input range. The TPS7H5001-SP PWM controller controls the power stage. The INA901-SP senses the inductor current and provides current feedback to the controller enabling both average current mode control and output short-circuit protection. If these features are not needed, the INA901-SP can be removed and the TPS7H5001-SP can be operated with voltage mode control. The adjustable deadtime of the TPS7H5001-SP allows the timing of the switching MOSFETs to be optimized and results in over 94% efficiency with 100-V input and over 96% efficiency with 50-V input. A self-biasing circuit is included to power the control circuits directly from the output. If an external 12-V bias is provided, the self-biasing circuit can be removed and result in higher efficiency.
| Output voltage options | PMP23193.1 |
|---|---|
| Vin (Min) (V) | 50 |
| Vin (Max) (V) | 150 |
| Vout (Nom) (V) | 28 |
| Iout (Max) (A) | 5 |
| Output Power (W) | 140 |
| 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.
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 overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 50- to 150-VIN, 28-V 5-A Sync. Buck Converter RefDes for 100-kRad Space Apps | PDF | HTML | May 2, 2023 |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.