The LM5017 Flybuck reference design provides multiple isolated outputs to supply the bias voltage needed in a PLC I/O module. It generates 4 isolated outputs: ±15V@50mA and ±5V@100mA; it can cover most of the required voltage rails in the I/O module, such as the OP-AMP, DAC bias, RS-485 transmitter and digital isolator power supplies. In the Flybuck, the regulation is done on the primary side, and thus no opto-coupler is needed. The overall load/line regulation for each output is within +/-5%. The input voltage range is from 17V to 32V.
| Output voltage options | PMP7993.1 | PMP7993.2 | PMP7993.3 | PMP7993.4 |
|---|---|---|---|---|
| Vin (Min) (V) | 17 | 17 | 17 | 17 |
| Vin (Max) (V) | 32 | 32 | 32 | 32 |
| Vout (Nom) (V) | 15 | -15 | 5 | -5 |
| Iout (Max) (A) | .05 | .05 | .1 | .1 |
| Output Power (W) | .75 | .75 | .5 | .5 |
| Isolated/Non-Isolated | Isolated | Isolated | Isolated | Isolated |
| Input Type | DC | DC | DC | DC |
| Topology | FlyBuck | FlyBuck | FlyBuck | FlyBuck |
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
Test results for the reference design, including efficiency graphs, test prerequisites and more
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
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
PCB layer plot file used for generating PCB design layout
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | PMP7993.1 Test Results | Sep. 12, 2013 | |
| * | Test report | PMP7993.2 Test Results | Sep. 12, 2013 | |
| * | Test report | PMP7993.3 Test Results | Sep. 12, 2013 | |
| White paper | Designing isolated rails on the fly with Fly-Buck™ converters | Sep. 29, 2015 | ||
| More literature | Pick the right turns ratio for a Fly-Buck converter (Rev. A) | Mar. 13, 2015 | ||
| More literature | Pick the right turns ratio for a Fly-Buck converter | Aug. 21, 2014 |
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