TOP249集成電路（IC）的ACDC轉換器離線開關規(guī)格書PDF中文資料

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

? Large thermal hysteresis prevents PC board overheating

EcoSmart?– Energy Efficient

? Extremely low consumption in remote off mode

(80 mW at 110 VAC, 160 mW at 230 VAC)

? Frequency lowered with load for high standby efficiency

? Allows shutdown/wake-up via LAN/input port