NCP1608BDR2G

@@ -0,0 +1,47 @@+# NCP1608BDR2G++**onsemi** · AC-DC Controllers and Regulators · SOIC-8++NCP1608BDR2G 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 | FB | input | Inverting input of the internal transconductance error amplifier. A resistor divider scales VOUT to the internal 2.5 V VREF for regulation. Also used for OVP (~106% VREF) and UVP (VUVP ~0.31 V) protections; controller disables when forced above VOVP or below VUVP. |+| 2 | Control | output | Output of the internal error amplifier. A compensation network (typically Ccomp to GND) is connected here to set the loop bandwidth; low bandwidth yields high power factor and low THD. Control voltage range ~4.5-5.3 V above Ct offset. |+| 3 | Ct | passive | Timing capacitor pin. Sources ~275 µA (Icharge) to charge an external timing capacitor; on-time ends when Ct reaches an internal voltage derived from VControl. Ct is then discharged (~50 ns) at end of on-time. VCt(MAX) ~4.93 V. |+| 4 | CS | input | Current sense input for cycle-by-cycle current limiting through the power switch. When VCS exceeds VILIM (typ 0.5 V), the DRV output turns off. External sense resistor programs the maximum switch current; leading-edge blanking ~190 ns. |+| 5 | ZCD | input | Zero Current Detection input. Senses the voltage of an auxiliary (NZCD) winding to detect boost-inductor demagnetization for CrM operation. Arming threshold ~1.4 V, triggering ~0.7 V; internal clamps at ~+10 V / −0.7 V protect the pin. |+| 6 | GND | power_in | Analog ground reference for the controller. All signal thresholds and the VCC supply are referenced to this pin. |+| 7 | DRV | output | Totem-pole gate driver output for the external power MOSFET. Typical source impedance 12 Ω (500 mA source) and sink impedance 6 Ω (800 mA sink). Rise/fall times ~35/25 ns; internally clamped for MOSFET gate protection. |+| 8 | VCC | power_in | Positive supply for the controller. Enables when VCC exceeds VCC(on) (typ 12 V) and disables when VCC drops below VCC(off) (typ 9.5 V); UVLO hysteresis ~2.5 V. Absolute max 20 V; startup current ≤35 µA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `NCP1608BDR2G`++## CAD (KiCad official)++- Symbol: `NCP1608BDR2G`+- 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://www.onsemi.com/pdf/datasheet/ncp1608b-d.pdf) (24 pp, sha256 `425a342161af0228`, retrieved 2026-08-17, tier: manufacturer)+- **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/ncp1608bdr2g-datasheet.pdf)

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