component
OB5686TCPA-H
Public Made by Adomby adom
OB On Bright Elec PFC Controllers, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownOB5686TCPA-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 (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).