Key facts
- Brand
- Power integrations
- Model
- TOP242-250
- Category
- Power Management
- Industry
- Electronics
- Documents
- 5
- Languages
- EN · ZH
- Last added
- 2012-07-12
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Power Integrations TOP242-250 Product Manual
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.
Power integrations TOP242-250 specifications
| Switching Frequency | 132 kHz |
|---|---|
| Remote Off Mode Consumption (110 VAC) | 80 mW |
| Remote Off Mode Consumption (230 VAC) | 160 mW |
Source: Power Integrations TOP242-250 TOPSwitch-GX Datasheet
All Power integrations TOP242-250 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the switching frequency of the TOPSwitch-GX?
The switching frequency is internally set for a fixed 132 kHz operation in P and G packages, or selectable between 132 kHz and 66 kHz for Y, R, or F packages.
Does the TOPSwitch-GX require a heatsink?
No, the device does not require a heatsink for power outputs up to 34 W when using P/G packages.
What is the maximum power range for the TOPSwitch-GX family?
The extended power range goes up to 290 W.
From: Integrations TOP242-250 TOPSwitch-GX Family Extended Power Design Handbook
How does the device reduce EMI?
It uses frequency jittering to reduce EMI and EMI filtering costs.
From: Integrations TOP242-250 TOPSwitch-GX Family Extended Power Design Handbook
What is the standby power consumption of the TOP242‑250?
The device consumes 80 mW at 110 VAC and 160 mW at 230 VAC in remote‑off mode.
Is a heatsink required for the TOP242‑250?
No heatsink is required for power levels up to 34 W when using the P package.