Datasheet Power Integrations TOP249G — 数据表

This product is not recommended for new designs. TOP242-250
TOPSwitch-GX Family
Extended Power, Design Flexible, EcoSmart,
Integrated Off-Line Switcher
Product Highlights
Lower System Cost, High Design Flexibility
• Extended power range for higher power applications
• No heat sink required up to 34 W using P/G packages
• Features eliminate or reduce cost of external components
• Fully integrated soft-start for minimum stress/overshoot
• Externally programmable accurate current limit
• Wider duty cycle for more power, smaller input capacitor
• Separate line sense and current limit pins on Y/R/F
packages
• Line undervoltage (UV) detection: no turn off glitches
• Line overvoltage (OV) shutdown extends line surge limit
• Line feed-forward with maximum duty cycle (DCMAX)
reduction rejects line ripple and limits DCMAX at high line
• Frequency jittering reduces EMI and EMI filtering costs
• Regulates to zero load without dummy loading
• 132 kHz frequency reduces transformer/power supply size
• Half frequency option in Y/R/F packages for video applications
• Hysteretic thermal shutdown for automatic fault recovery …