BP3519 is a PSR (Primary-Side Regulation) isolated Constant-Current/Constant-Voltage (CCCV) driver IC from BPS / Bright Power Semiconductor. It is designed for offline flyback applications and operates from a universal 85–265 VAC input range. Key Specifications Parameter BP3519 Manufacturer BPS (Bright Power Semiconductor) Part Number BP3519 Function PSR Isolated CCCV Driver IC Topology PSR Flyback Input 85–265 VAC Control PWM / PFM Output Accuracy ±5% Standby Power <100 mW Package SOT23-5L Operating Temperature −40°C to +105°C Gate Drive External power MOSFET Pins GATE, GND, CS, FB, VCC The IC includes cycle-by-cycle peak-current control, load open/short protection, VCC under/over-voltage protection, over-temperature protection, and internal soft-start. Pin Configuration 1. GATE – Drives external power MOSFET 2. GND – Ground 3. CS – Current-sense input 4. FB – Feedback input 5. VCC – Supply voltage Applications • Battery/AC-DC chargers • LED power supplies • Standby / auxiliary power supplies • Compact isolated AC-DC converters • CCCV flyback power supplies Exact MPN: BP3519 Brand/Make: BPS Package: SOT23-5L