FAN6300HMY

@@ -0,0 +1,51 @@+# FAN6300HMY++**onsemi** · AC-DC Controllers And Regulators · SOIC-8++FAN6300HMY from onsemi, in a SOIC-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 | DET | input | Detection input tied through a divider to an auxiliary transformer winding. Generates the zero-current-detect (ZCD) valley-switching signal, provides a line-compensation offset for constant power limiting, and forms the output OVP comparator against an internal 2.5 V reference (latched shutdown). |+| 2 | FB | input | Feedback input from the secondary-side error amplifier / optocoupler collector. Input impedance ~5 kΩ equivalent with a 1/3 attenuator to the PWM comparator. If FB voltage exceeds ~4.2 V for more than 55 ms, open-loop protection latches off. |+| 3 | CS | input | Current-sense comparator input. Connect to a sense resistor at the source of the external power MOSFET; the resulting voltage drives cycle-by-cycle peak-current limiting and leading-edge blanking is applied internally. |+| 4 | GND | power_in | Power ground and signal ground. A 0.1 µF decoupling capacitor is recommended between VDD and GND close to the IC. |+| 5 | GATE | output | Totem-pole PWM gate-drive output for the external power MOSFET. Output voltage is clamped internally to 18 V to protect the MOSFET gate-source oxide. |+| 6 | VDD | power_in | Controller supply pin. Two-step UVLO with turn-on threshold ~16 V and turn-off ~10 V. Startup current below 20 µA and operating current below 4.5 mA. |+| 7 | NC | unconnected | No internal connection. Leave floating or tie to a copper island for isolation between HV and VDD. |+| 8 | HV | power_in | High-voltage startup input. Connects to the rectified bulk DC line to supply the internal HV startup current source that charges the VDD capacitor. Disabled once VDD exceeds the turn-on threshold to minimize standby power. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `FAN6300HMY`+- `FAN6300AMY`++## CAD (KiCad official)++- Symbol: `FAN6300HMY`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588913946686869504) (15 pp, sha256 `01751df7738d4285`, 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/fan6300hmy-datasheet.pdf)

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