Part Information Review and Updates
Datasheet URL is already populated, so I did not overwrite it.Table
| Field | Current project | Datasheet / source check | Status |
|---|---|---|---|
| Manufacturer Part Number | POE70P-50LD | Datasheet family shows base part POE70P-50L_ with D as the reel packaging suffix; distributor listing includes POE70P-50LD | OK |
| Manufacturer Name | COILCRAFT | Coilcraft | OK |
| Datasheet URL | Mouser-hosted PDF | Valid datasheet found and usable | OK |
| Designator Prefix | T | Transformer prefix T is appropriate | OK |
| Package / Case Code | Not set | Datasheet shows an 8-pin SMD flyback transformer package with a recommended land pattern | Missing |
| Pin Count | Not set as a property | Datasheet and project both indicate 8 pins | OK |
| Description | Audio Transformers / Signal Transformers POE70P Flyback 7uH 5.0 V 1.4 A | Datasheet indicates 155 µH primary inductance, 7 W, 5.0 V / 1.4 A output | Mismatch |
Table
| Item | Value |
|---|---|
| Function | Flyback transformer for PoE applications |
| Power | 7 W |
| Input operating condition | 36 V to 72 Vdc, continuous mode, 250 kHz |
| Primary inductance | 155 µH at 0 A |
| Primary inductance at Ipk | 139.5 µH min |
| Peak primary current | 0.65 A |
| DCR max | Primary 0.414 Ω, Bias 0.822 Ω, Secondary 0.060 Ω per secondary winding |
| Leakage inductance | 3.60 µH max |
| Turns ratio | Primary:Secondary 1:0.262, Primary:Bias 1:0.667 |
| Main output | 5.0 V, 1.4 A |
| Bias output | 12 V, 20 mA |
| Isolation | 1500 Vrms primary/bias-to-secondary; 500 Vrms between other windings |
| Ambient temperature | -40°C to +85°C |
| Max part temperature | +125°C |
| Weight | 3.85 g |
Table
| Check | Result |
|---|---|
| Terminal count | 8 terminals present in schematic, matching the datasheet |
| Winding groups | The symbol clearly separates bias, primary, and secondary windings |
| Secondary split | The symbol represents the two secondary windings separately, which aligns with the datasheet note that they are connected in parallel on the PCB |
Table
| Issue | Details |
|---|---|
| Pin types missing | All 8 terminals currently have Pin Type = Unspecified |
| Pin descriptions missing | No Pin Description properties are populated on the terminals |
| Possible pin-name polarity mismatch | The datasheet mapping is: pin 1 = PRI dot, 3 = PRI non-dot, 4 = BIAS dot, 2 = BIAS non-dot, 6/8 = secondary dot ends, 5/7 = secondary non-dot ends. Your current labels appear to assign polarity by +/-, but transformer dot convention is not always equivalent to DC + / -, so these labels should be verified carefully. |
| Pin-number-to-label convention | The symbol uses functional labels instead of numeric pin names. That can be fine, but the polarity meaning should explicitly match the datasheet dot convention. |
Table
| Datasheet pin | Datasheet function | Current terminal | Assessment |
|---|---|---|---|
| 1 | Primary, dot end | BIAS_- | Mismatch |
| 2 | Bias, non-dot end | BIAS_ | Polarity label likely questionable |
| 3 | Primary, non-dot end | PRI_ | Polarity label likely questionable |
| 4 | Bias, dot end | PRI_- | Mismatch |
| 5 | Secondary, non-dot end | SEC_ _1 | Polarity label likely questionable |
| 6 | Secondary, dot end | SEC_ _2 | Polarity label likely questionable |
| 7 | Secondary, non-dot end | SEC_-_1 | Polarity label likely questionable |
| 8 | Secondary, dot end | SEC_-_2 | Polarity label likely questionable |
Table
| Check | Result |
|---|---|
| Footprint exists | Yes |
| Pad count | 8 pads, matching the datasheet package |
| Pin-1 convention | Datasheet explicitly marks pin 1 with a dot |
| Recommended land pattern | Present in the datasheet |
Table
| Item | Result |
|---|---|
| Exact pad geometry / spacing comparison | Not fully exposed by the current layout query |
| Exact land-pattern dimension match | Could not be conclusively verified from the available layout output alone |
| Pad numbering in footprint | The footprint currently exposes pads by functional designator labels rather than clearly visible numeric pad IDs in the returned data |
Table
| Priority | Issue | Recommendation |
|---|---|---|
| High | Project description says 7uH | Change to 155 µH primary inductance and mention 7 W |
| High | Pin 1 and pin 4 functional labels appear swapped between primary and bias | Correct terminal naming or pin-number assignment to match datasheet |
| High | All terminal Pin Type values are Unspecified | Set to appropriate types, likely Passive for transformer windings |
| Medium | No pin descriptions | Add short descriptions like Primary dot, Bias non-dot, Secondary A dot, etc. |
| Medium | Package / case metadata missing | Add package/case code based on datasheet package |
| Medium | +/- terminal naming may be misleading | Prefer dot/non-dot naming unless you specifically want application-level polarity aliases |
Table
| Suggested description |
|---|
| Flyback transformer for PoE applications, 7 W, 155 µH primary, 5.0 V 1.4 A output, 12 V 20 mA bias |