OB2202CPA

@@ -0,0 +1,49 @@+# OB2202CPA++**OB On Bright Elec** · AC-DC Controllers and Regulators · SOP-8++OB2202CPA 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 | SS | bidirectional | Multi-functional soft-start pin. Connect a capacitor from SS to GND for soft-start programming. Also supports external latch triggering by pulling SS above 3.8V (pull-up current > 200uA). |+| 2 | FB | bidirectional | Feedback input. PWM duty cycle is set from the voltage on this pin combined with the CS current-sense signal. Also selects operating mode: QR, PFM (threshold ~1.4-1.5V), or Burst Mode (threshold ~0.5-0.7V). Input impedance ~4 kOhm; open-pin voltage ~5.3V. |+| 3 | CS | input | Current sense input for primary MOSFET current. Internal leading-edge blanking ~350 ns; internal current limit threshold V_TH_OC ~0.60V (0.57-0.63V). |+| 4 | GND | power_in | Ground for internal circuitry. Common return for VCC and signal pins. |+| 5 | GATE | output | Totem-pole gate drive output for external power MOSFET. Peak sink/source capability ~1A; internal clamp ~16.5V; rise/fall times ~50/20 ns at 1nF load. |+| 6 | VCC | power_in | Chip DC power supply pin. Recommended operating range 11-28V. UVLO(ON) ~15.8V (startup), UVLO(OFF) ~8.8V; VCC OVP ~33V; Zener clamp ~34V. Typical operating current ~3 mA switching. |+| 7 | DEM | bidirectional | Demagnetization sense input from transformer auxiliary winding for valley/QR timing. Also used for output over-voltage protection (Load OVP); V_TH_OVP ~3.75V. Clamp voltages -0.5V/+5.8V. |+| 8 | BO | bidirectional | Brownout and Line OVP detection pin. Connect a resistor divider from line voltage. Brownout threshold Vth_BO ~0.5V with 50 ms debounce disables PWM; Line OVP threshold ~2V. Sources ~1 uA for hysteresis programming. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | OB On Bright Elec |+| Package | SOP-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `OB2202CPAOB2202CP`+- `OB2202CPA`+- `OB2202CPAOB2202AP`++## CAD (KiCad official)++- Symbol: `OB2202CPA`+- 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/ob2202cpa-datasheet.pdf) (13 pp, sha256 `14cfbe26a6ff27da`, 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/ob2202cpa-datasheet.pdf)

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