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Overview
| Topology | Flyback Converter |
| Input voltage | 100-623 V |
| Output 1 | 35 V / 0.03 A |
| Output 2 | 12 V / 0.7 A |
| Output 3 | 12 V / 0.73 A |
| IC revision | B |
Description
This offline flyback reference design uses the LM5021 controller to generate 3 isolated outputs (12 V at 705 mA, 12 V at 733 mA, 35 V at 25 mA) from an 3 phase AC input (58 VAC - 255 VAC). The DC input voltage range is between 100 V and 623 V. The design can provide 18-W output power. The LM5021 uses an optical coupler to regulate the 12-V output and to improve transient response. The controller operates with a fixed frequency of 100kHz.
Features
3 phase input, which allows a very wide input voltage rangeAchieves over 85% efficiency at high lineOptocoupled feedback for constant voltage regulationOutput overvoltage protection with latch, in case of loop opto fail
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | VOut2 (V) | IOut2 (A) | VOut3 (V) | IOut3 (A) | Vaux (V) | fswitch (kHz) | L (µH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (DC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750317812 | SPEC | 5 files | MID-OLTI Offline Flyback Transformers for Texas Instruments | 100 - 623 V (DC) | 12 | 0.705 | 12 | 0.733 | 35 | 0.025 | 15 | 100 | 1500 | 7:1:1:2.8:1.3 | 1.6 | 4000 | 41.5 | 44.5 | 30 | THT | ERL35 |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | VOut2 (V) | IOut2 (A) | VOut3 (V) | IOut3 (A) | Vaux (V) | fswitch (kHz) | L (µH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (DC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples |
|---|