SD6824D

@@ -0,0 +1,52 @@+# SD6824D++**Hangzhou Silan Microelectronics** · LED Drivers · DIP-7++SD6824D from Hangzhou Silan Microelectronics, in a DIP-7. 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 | Ground pin. Common return for the control IC and internal MOSFET source reference. |+| 2 | SOURCE | passive | Source terminal of the internal power MOSFET, and the current-sense sampling pin for the control chip. Connect an external current sense resistor Rsen from this pin to GND to program peak current (Ipk = Vcscc/Rsen, Vcscc ~= 0.2 V). |+| 3 | NC | unconnected | No connect. Leave floating; do not use to route traces. |+| 4 | FB | input | Feedback voltage detection input. Sensed via a resistor divider from the transformer auxiliary winding: enables zero-current detection (ZCD triggers when FB falls below 0.3 V to turn the MOSFET on) and LED open/overvoltage protection (trips when FB exceeds VFBOVP ~= 1.70 V, min 1.61 V, max 1.79 V). Absolute maximum on this analog input: -0.3 V to 5.5 V. |+| 5 | VCC | power_in | Chip supply pin. Charged by an external startup resistor from the AC input to the VCC capacitor at power-up; once VCC reaches VCCON (typ 18 V, 15.5-20 V), the IC starts and is subsequently maintained above VCCOFF (typ 7.7 V, 6.7-8.7 V) by the transformer auxiliary winding. Operating range 9-25 V; absolute maximum -0.3 to 26.5 V. Startup current ~20 uA at VCC=14 V; operating current ~0.6 mA typical for SD6824D. |+| 6 | DRAIN | passive | Drain of the internal 650 V power MOSFET. Connects to the primary winding of the flyback transformer. For SD6824D: BVDSS = 650 V, RDS(on) typ 2.3 Ω (max 2.7 Ω) at VGS=10 V/ID=2 A, continuous ID = 4 A (Tamb=25°C), pulsed IDM = 16 A, EAS = 202 mJ. Pin 6 and pin 7 are internally tied together to share drain current. |+| 7 | DRAIN | passive | Drain of the internal 650 V power MOSFET (paralleled with pin 6). Both drain pins must be tied together on the PCB and connected to the transformer primary; the parallel connection reduces conduction resistance and improves thermal dissipation. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Hangzhou Silan Microelectronics |+| Package | DIP-7 |+| Category | LED Drivers |+| Pins | 7 |++## Ordering variants++Same part, different packaging or reel option.++- `SD6824DD`+- `SD6824DD (SD6827D)`+- `SD6824DS`+- `SD6824DSTR`++## CAD (KiCad official)++- Symbol: `SD6824D`+- Footprint: `Package_DIP:DIP-8-N6_W7.62mm`+- 3D model: DIP-7 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Hangzhou Silan Microelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588894604171087872) (11 pp, sha256 `1086a652b6cb3661`, 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/sd6824d-datasheet.pdf)

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