Redundancy is often employed in spacecraft applications to enhance reliability, this reference design shows how redundancy can be implemented at the input of a Point-of-Load (POL) supply using two TPS7H2201-SP radiation hardened eFuse load switches. Using two load switches allows for a primary and redundant voltage to be supplied to the rad hardened POL step-down converter TPS50601A-SP, Applications the load switch provides an adjustable over-current protection (OCP) limit for protection along with a current sense ouput pin allows for monitoring and protection, the load switch also features adjustable over-voltage protection (OVP). The POL converter also has a current limit providing additional protection to shorts.
| Output voltage options | TIDA-070001.1 |
|---|---|
| Vin (Min) (V) | 3 |
| Vin (Max) (V) | 7 |
| Vout (Nom) (V) | 2.5 |
| Iout (Max) (A) | 6 |
| Output Power (W) | 15 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Synchronous |
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Reference design overview and verified performance test data
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Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
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Design file that contains information on physical board layer of design PCB
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| Type | Title | Date | |
|---|---|---|---|
| * | Design guide | 3- to 7-VIN, Space-Grade POL Reference Design with Redundant eFuse Inputs (Rev. A) | Jul. 30, 2019 |
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