This reference design uses the LM51551 as a secondary side regulated (SSR) flyback controller. It converts an input of 8 to 28.8 V and 24 V at a maximum power of 28.8 W. The supply starts up at a minimum input of 15.5 V and can operate to 8-V input. The design also includes the synchronous buck converter, LMR33620, to step down 24 V to 5 V. This design features the option to evaluate either the TPS26631 eFuse or LM74700 ideal diode controller as input protection devices.
| Output voltage options | PMP22800.1 | PMP22800.2 |
|---|---|---|
| Vin (Min) (V) | 8 | 21.6 |
| Vin (Max) (V) | 28.8 | 26.4 |
| Vout (Nom) (V) | 24 | 5 |
| Iout (Max) (A) | 1.2 | 1.6 |
| Output Power (W) | 28.8 | 8 |
| Isolated/Non-Isolated | Isolated | Non-Isolated |
| Input Type | DC | DC |
| Topology | Flyback- Non Sync | 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
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
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 24-V, 1.2-A DC-DC Flyback Reference Design | PDF | HTML | Jun. 24, 2022 |
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