DP4111

@@ -0,0 +1,48 @@+# DP4111++**Shenzhen Developer Microelec** · AC-DC Controllers and Regulators · SOP-8++DP4111 from Shenzhen Developer Microelec, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | GND | power_in | IC reference ground and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally. |+| 2 | GND | power_in | IC reference ground and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally. |+| 3 | GND | power_in | IC reference ground and source of the internal power MOSFET. Pins 1, 2, 3 are tied together internally. |+| 4 | VDD | power_in | IC supply pin. Internally regulated to ~7.1 V via a high-voltage LDO from the Drain pin (no auxiliary winding required). UVLO thresholds: VDD_ON=4.0 V typ, VDD_OFF=3.1 V typ; clamped at 7.4 V typ (5 mA). Recommended decoupling: ≥0.1 µF ceramic. |+| 5 | Drain | power_in | Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally for current handling. |+| 6 | Drain | power_in | Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally. |+| 7 | Drain | power_in | Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally. |+| 8 | Drain | power_in | Drain of the internal synchronous-rectifier power MOSFET (BVDSS = 45 V, Rds_on ≈ 10 mΩ for DP4111). Pins 5, 6, 7, 8 are tied together internally. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Shenzhen Developer Microelec |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `DP4111`++## CAD (KiCad official)++- Symbol: `DP4111`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Shenzhen Developer Microelec datasheet](docs/dp4111-datasheet.pdf) (9 pp, sha256 `8aaccc46363990e6`, retrieved 2026-08-17, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/dp4111-datasheet.pdf)

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