La-k201p Schematic [upd] [FAST]

AC Mains (120/230V) │ │ C1, L1, R1 (EMI filter) ▼ ┌─────> Bridge Rectifier (D1–D4) ──────► VDC_IN (≈340 V) │ ▼ C2 (Bulk capacitor, 470 µF/400 V) │ ▼ ┌─► R2 (soft‑start resistor) ──┐ │ │ ▼ ▼ Q1 (N‑MOSFET, 600 V, 2 A) │ │ │ └─► L1 (Primary Inductor, 12 µH)│ │ │ ▼ ▼ D5 (Free‑wheeling diode, 600 V) VOUT (5 V) │ │ ▼ ▼ C3 (Output filter, 470 µF/10 V) │ ▼ R3‑R5 (Voltage divider) ──► FB node │ ▼ Opto‑isolator (U2) → Controller (U1) │ ▼ Protection comparators (U3, U4)