OB5686TCPA-H

@@ -0,0 +1,49 @@+# OB5686TCPA-H++**OB On Bright Elec** · PFC Controllers · SOP-8++OB5686TCPA-H from OB On Bright Elec, 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 | CS | input | Current sense input pin. Senses the primary MOSFET switching current via an external sense resistor between the source and GND for cycle-by-cycle overcurrent limiting. Over-current threshold Vth_ocp ~0.7 V (typical) at Ton=0us, with leading-edge blanking of ~420 ns. |+| 2 | VDD | power_in | IC power supply pin. Charged via the HV startup circuit at power-on, then held up by the auxiliary winding during operation. UVLO_off ~16.2 V (rising), UVLO_on ~8 V (falling), VDD_ovp ~32 V; absolute max 40 V. Static current IVDD_op ~850 uA at VDD=20 V. |+| 3 | GND | power_in | Power ground / signal ground return for the IC and the current-sense resistor. |+| 4 | FB | input | Output voltage feedback pin. Samples the auxiliary-winding (flyback) or buck-inductor voltage through a resistor divider to regulate the output using an internal reference Vref ~2.5 V. Also used for quasi-resonant detection, output OVP (~3.2 V) and short-circuit protection (~0.4 V). Absolute max -1 to 7 V. |+| 5 | HV | power_in | High-voltage startup pin. Connects through a ~20 kΩ (typical) resistor to the rectified AC bus and delivers ~1 mA to charge the VDD capacitor at startup, then shuts off after UVLO_off. Absolute max -0.3 to 700 V. |+| 6 | NC | unconnected | No connection. Leave floating on the PCB. |+| 7 | DRAIN | power_out | Drain terminal of the internal power MOSFET. Pins 7 and 8 are internally tied to the same drain node and should be connected in parallel to reduce impedance and improve thermal dissipation. BVdss = 650 V for the -H suffix. |+| 8 | DRAIN | power_out | Drain terminal of the internal power MOSFET. Pins 7 and 8 are internally tied to the same drain node and should be connected in parallel to reduce impedance and improve thermal dissipation. BVdss = 650 V for the -H suffix. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OB On Bright Elec |+| Package | SOP-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `OB5686TCPA-H`++## CAD (KiCad official)++- Symbol: `OB5686TCPA-H`+- 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:** [OB On Bright Elec datasheet](docs/ob5686tcpa-h-datasheet.pdf) (11 pp, sha256 `27ab41ecce3fa2e5`, retrieved 2026-08-17, tier: lcsc)+- **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/ob5686tcpa-h-datasheet.pdf)

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