TOPSwitch-GX family is a family of integrated, high-power, EcoSmart, off-line switchers. Features include a wide power range of 2W to 100W, no heatsink required up to 34W using P package, and multiple energy-saving features such as frequency jittering, externally programmable accurate current limit, and half-frequency option.
The TOP242‑250 series belongs to the TOPSwitch‑GX family of integrated offline switcher ICs. It combines a high‑voltage power MOSFET, PWM control, fault protection and programmable features on a single CMOS chip, offering design flexibility and low system cost.
The document includes functional block diagrams, pin descriptions, performance characteristics such as switching frequency, standby power, duty‑cycle limits, and output‑power tables for various package options. It also explains external programmability of current limit, frequency selection, and line‑sense functions.
| Switching frequency (default) | 132 kHz |
|---|---|
| Standby power consumption | 80 mW at 110 VAC, 160 mW at 230 VAC |
| Heatsink requirement | No heatsink required up to 34 W (P package) |
| Minimum switching frequency at light load | 30 kHz (for 132 kHz mode) |
The device consumes 80 mW at 110 VAC and 160 mW at 230 VAC in remote‑off mode.
No heatsink is required for power levels up to 34 W when using the P package.