The document describes the features and characteristics of TOPSwitch-GX products, including cost reduction, design flexibility, and energy efficiency. The product integrates high-voltage MOSFETs, PWM controllers, and automatic fault protection functions. It can adapt to applications with different power levels.
The TOP242‑250 series (TOPSwitch‑GX) integrates a high‑voltage MOSFET, PWM controller and protection circuitry on a single silicon die. It offers higher output power, reduced component count, and flexible design options such as external current‑limit programming and line‑voltage detection. The device operates at a default switching frequency of 132 kHz with a typical maximum duty cycle of 78 %.
The manual provides detailed pin descriptions, functional block diagrams, and application examples for various power‑supply topologies. It also explains soft‑start, automatic restart, thermal shutdown, UV/OV protection, and remote on/off control, helping designers implement efficient and reliable offline power supplies.
| Default switching frequency | 132 kHz |
|---|---|
| Maximum duty cycle (DCMAX) | 78 % (typical) |
The default switching frequency is 132 kHz.