TOP414GN [Power Integrations]

The TOP412/414 is a three-terminal DC to DC PWM switch that integrates a high-voltage power MOSFET and PWM controller in a single device. It serves as a low-cost replacement for discrete switchers, reducing component count by up to 15 while increasing reliability. The device achieves over 80% efficiency in flyback topology and supports multiple configurations including Buck, Boost, Flyback, and Forward topologies. Key features include built-in start-up and current limit, low-capacitance MOSFET for reduced switching losses, and a CMOS controller consuming only 7 mW. It requires only one external capacitor for compensation and auto-restart functions. System-level protections include auto-restart for fault recovery, cycle-by-cycle current limiting, and latching thermal shutdown. The device operates down to 16V DC input and is suitable for telecom, cablecom, and other DC-DC converter applications up to 21W output power.