This reference design demonstrates a half-bridge LLC converter with an input voltage range from 450V to 800 (950V) by using the UCC256612. The design implements HV start-up and isolated gate driver, UCC5350 for 800 (950V) operation. The design replaces the optocoupler with an opto- emulator ISOM8110 to mitigate the signal degradation by current transfer ratio (CTR) over time. The design is an excellent choice for automotive μDC-DC and data center AUX applications.
| Output voltage options | PMP41133.1 |
|---|---|
| Vin (Min) (V) | 450 |
| Vin (Max) (V) | 800 |
| Vout (Nom) (V) | 48 |
| Iout (Max) (A) | 6.5 |
| Output Power (W) | 312 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Half Bridge- LLC |
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
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Includes TI products in the design and potential alternatives.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Test report | Automotive 800V to 48V-300W μDC-DC Converter Reference Design | PDF | HTML | Jul 29, 2026 |
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