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 (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