Chat
Welcome to Flux
Treat Flux like your intern. Tell it what you'd like to build and it'll get to work. You can also ask it questions, brainstorm ideas, and teach it your preferences. Learn More
Explain this part
Write a part description
Describe each pin
Operating conditions
Electrical max ratings
Part Specifications
Application circuits
Verify Part Details
Recommend similar parts
Check availability & lifecycle
Refine this doc
Ask about this doc
Part Datasheet Audit
Audit scope
Part project reviewed against the official Würth Elektronik datasheet for MPN 750032052.
- Official datasheet: https://www.we-online.com/components/products/datasheet/750032052.pdf
- Existing Datasheet URL property:
https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/feb061d521e6d9c3d1ace1356588a3afe683425e5392b6fd7e16c5e04a31edff.pdf - The Datasheet URL property was already populated, so it was not changed.
Existing part information
Table
| Field | Current value | Review |
|---|---|---|
| Manufacturer Part Number | 750032052 | Matches official order code |
| Manufacturer Name | Würth | Correct but abbreviated; datasheet identifies Würth Elektronik / Würth Elektronik Midcom |
| Part Type | Transformers | Correct, though “Flyback Transformer” would be more specific |
| Designator Prefix | L | Present; transformer prefixes are commonly T, but this is a library convention rather than a datasheet mismatch |
| Description | WE-FB 3751 Flyback Transformer for LT3751 | Matches current official datasheet title |
| Package / size | EFD20 | Matches datasheet |
| Pin/pad count | 10 | Matches physical package; six pins are winding connections and four are N.C. |
| Footprint asset | 750032052.kicad_mod | Present |
| 3D model asset | 750032052.stp | Present |
| Symbol asset | 750032052 Symbol.svg | Present |
Key official specifications
Table
| Parameter | Official value |
|---|---|
| Primary inductance, N1 | 10 µH ±10%, measured at 10 kHz / 100 mV |
| Turns ratio, N1:N2 | 1:10 |
| Saturation current, N1 | 10 A typical at |
| N1 DC resistance | 0.02 Ω maximum at 20 °C |
| N2 DC resistance | 1.06 Ω maximum at 20 °C |
| Leakage inductance, referred to N1 | 0.3 µH maximum at 100 kHz / 10 mA |
| Insulation test voltage | 1000 VAC, N1 to N2 |
| Operating temperature | -40 °C to +125 °C |
| Moisture sensitivity level | MSL 1 |
| Package | EFD20, SMD |
| Maximum body dimensions | 28.7 mm × 21.97 mm × 11.43 mm |
| Product marking | 32052, with pin-1 dot |
Official winding and pin mapping
The datasheet schematic defines:
Table
| Pin(s) | Datasheet function | Polarity |
|---|---|---|
| 1 | N1 end | Dotted end |
| 4, 5 | N1 opposite end | Undotted end |
| 10 | N2 end | Dotted end |
| 6, 7 | N2 opposite end | Undotted end |
| 2, 3, 8, 9 | N.C. | No electrical connection |
Schematic symbol cross-check
Current symbol terminals:
Table
| Pin | Current label | Expected label/function | Result |
|---|---|---|---|
| 1 | N2+ | N1 dotted end, e.g. N1+ | Mismatch |
| 2 | N.C. | N.C. | Match |
| 3 | N.C. | N.C. | Match |
| 4 | N1- | N1 undotted end | Match |
| 5 | N1- | N1 undotted end | Match |
| 6 | N1+ | N2 undotted end, e.g. N2- | Mismatch |
| 7 | N1+ | N2 undotted end, e.g. N2- | Mismatch |
| 8 | N.C. | N.C. | Match |
| 9 | N.C. | N.C. | Match |
| 10 | N2- | N2 dotted end, e.g. N2+ | Polarity mismatch |
Symbol findings
- Primary and secondary winding names are mixed. Pins 1/4/5 must all belong to N1, while pins 10/6/7 must all belong to N2.
- Dot polarity is inconsistent. If
+denotes the dotted end, pin 1 should beN1+and pin 10 should beN2+; pins 4/5 should beN1-, and pins 6/7 should beN2-. - Pin descriptions are missing. Every terminal currently has Pin Type
Unspecified, with no Pin Description, Pin Group, Section, orientation, or terminal-order metadata. - N.C. pins are correctly identified by number, but should have explicit descriptions such as “No internal connection; leave electrically unconnected.”
Footprint cross-check
The official recommended land pattern specifies:
- Two pad columns separated by 22.66 mm center-to-center
- 3.75 mm vertical pitch
- Pads 2.92 mm × 1.52 mm
- Left column pins 1 through 5; right column pins 6 through 10
The current footprint’s computed pad geometry corresponds to:
- X positions approximately ±11.33 mm, giving 22.66 mm column spacing
- Y positions ±7.50, ±3.75, and 0 mm, giving 3.75 mm pitch
- Pad size 2.92 mm × 1.52 mm after the applied 90° rotation
- Ten rectangular SMD pads in the correct two-column sequence
Result: The copper pad geometry and pin count match the datasheet-recommended land pattern. No pad-position or pad-size mismatch was found.
Footprint limitations / items not fully verified
- The available computed layout data did not expose detailed solder-mask expansion, paste-mask apertures, courtyard, fabrication outline, or silkscreen primitives from the imported
.kicad_mod; these were not independently confirmed. - The 3D STEP model is present and rotated 90°, but exact body-to-pad alignment and body dimensions were not numerically exposed for a full model fit check.
Recommended corrections
- Rename symbol terminals to align with the official winding mapping:
- Pin 1 →
N1+ - Pins 4, 5 →
N1- - Pin 10 →
N2+ - Pins 6, 7 →
N2-
- Pin 1 →
- Add explicit Pin Descriptions for all ten terminals.
- Assign winding-based Pin Groups/Sections (
Primary,Secondary,No Connect) and meaningful pin types; keep N.C. pins explicitly marked. - Optionally replace the stored uploaded-copy Datasheet URL with the canonical official Würth URL for long-term traceability, although the existing property was not missing and therefore was left unchanged in this audit.
- Visually inspect the footprint silkscreen pin-1 marker and STEP model alignment before publishing or manufacturing.
Overall assessment
- Metadata: Mostly correct; manufacturer naming is abbreviated and the datasheet property points to an uploaded copy rather than the canonical manufacturer URL.
- Symbol: Not correct for use as-is because the primary/secondary winding labels and dot polarity do not match the datasheet pin mapping.
- Footprint: Copper land pattern matches the official dimensions and pin arrangement based on the exposed geometry.
- Pin descriptions: Incomplete; all terminals lack descriptive/function metadata and are typed as
Unspecified.
Audit scope
Existing part information
Key official specifications
Official winding and pin mapping
Schematic symbol cross-check
Symbol findings
Footprint cross-check
Footprint limitations / items not fully verified
Recommended corrections
Overall assessment
