Overview
The TOP244YN is a high-performance, integrated off-line switcher from Power Integrations, part of the TOPSwitch-GX family. This component is designed to provide extended power range, high design flexibility, and lower system costs. It features a fully integrated soft-start, externally programmable current limit, and line under-voltage and over-voltage protection, making it suitable for a variety of power supply applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TO220-7C |
| Switching Frequency | 61.5 kHz to 140 kHz (selectable) |
| Maximum Continuous Power | Up to 34 W (non-ventilated enclosed adapter at 50°C ambient) |
| Input Voltage Range | 85-265 VAC |
| Line Under-Voltage Detection | Yes |
| Line Over-Voltage Shutdown | Yes |
| External Current Limit | Externally programmable |
| Soft-Start | Fully integrated |
| EMI Reduction | Frequency jittering |
Key Features
- Extended power range for higher power applications
- No heatsink required up to 34 W using P package
- Fully integrated soft-start for minimum stress and overshoot
- Externally programmable accurate current limit
- Wider duty cycle for more power and smaller input capacitor
- Line under-voltage (UV) detection and line over-voltage (OV) shutdown
- Frequency jittering reduces EMI and EMI filtering costs
- Regulates to zero load without dummy loading
- Separate line sense and current limit pins on Y/R/F packages
Applications
The TOP244YN is suitable for a wide range of power supply applications, including:
- Offline power supplies
- Adapters and chargers
- Set-top boxes and other consumer electronics
- Industrial power supplies
- LED lighting power supplies
Q & A
- What is the maximum continuous power of the TOP244YN?
The maximum continuous power of the TOP244YN is up to 34 W in a non-ventilated enclosed adapter at 50°C ambient. - What are the key features of the TOP244YN?
The key features include extended power range, fully integrated soft-start, externally programmable current limit, wider duty cycle, and line under-voltage and over-voltage protection. - What is the switching frequency range of the TOP244YN?
The switching frequency range is 61.5 kHz to 140 kHz, which is selectable. - Does the TOP244YN require a heatsink?
No heatsink is required up to 34 W using the P package. - How does the TOP244YN reduce EMI?
The TOP244YN reduces EMI through frequency jittering. - What are the typical applications of the TOP244YN?
Typical applications include offline power supplies, adapters and chargers, set-top boxes, industrial power supplies, and LED lighting power supplies. - What is the input voltage range of the TOP244YN?
The input voltage range is 85-265 VAC. - Does the TOP244YN have line under-voltage and over-voltage protection?
Yes, it has both line under-voltage detection and line over-voltage shutdown. - Can the current limit of the TOP244YN be externally programmed?
Yes, the current limit can be externally programmed. - How does the TOP244YN handle zero load conditions?
The TOP244YN regulates to zero load without the need for dummy loading).
