This reference design showcases a 5-V output, 4000-V isolated Flyback DC/DC converter for RS485 applications. Using the boost converter TPS61046, the circuit supports wide input voltage range and up to 250mA output current with 78% efficiency from a 10-V input. The reference design uses an adaptive dummy load circuit to improve the load regulation of the primary side regulation solution for cost effective applications. It also introduces the secondary side regulation solution aiming at the high VOUT accuracy applications.
| Output voltage options | PMP9801 |
|---|---|
| Vin (Min) (V) | 5 |
| Vin (Max) (V) | 20 |
| Vout (Nom) (V) | 5 |
| Iout (Max) (A) | .25 |
| Output Power (W) | 1.25 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Flyback- Non Sync |
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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Design file that contains information on physical board layer of design PCB
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | PMP9801 Reference Design 5-V Output, 4000-V Isolated Power Supply for R485 Apps | Jun. 21, 2016 |
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