onsemi PFC (Power Factor Correction) NCP1601AP

The NCP1601AP is a Power Factor Correction (PFC) controller designed for boost circuits, operating in both fixed-frequency Discontinuous Conduction Mode (DCM) and variable-frequency Critical Conduction Mode (CRM). This dual-mode operation allows for enhanced performance by limiting maximum switching frequency and current, which simplifies EMI filter design and improves circuit reliability. The device achieves near-unity power factor in both modes and features voltage-mode operation. It has low startup and shutdown current consumption, programmable switching frequency for DCM, and synchronization capability. Safety features include overvoltage protection, undervoltage protection, programmable overcurrent protection, and thermal shutdown with hysteresis. The NCP1601AP is suitable for various applications, including electronic light ballasts, AC adapters, and mid-power applications. It is available in a Pb-free PDIP-8 package, making it a compact option for engineers looking to implement robust PFC stages with minimal external components.