Highest Performance and Design Flexibility

? Lossless zero cross signal generation

? Supports buck, buck-boost and flyback topologies

? Enables ±3 regulation across line and load

? Selectable device current limit

? 66 kHz operation with accurate current limit

? Allows the use of low-cost off-the-shelf inductors

? Reduces size and cost of magnetics and output capacitor

? Frequency jittering reduces EMI filter complexity

? X capacitor discharge function (LNK331x only)

Enhanced Safety and Reliability Features

? Soft-start limits system component stress at start-up

? Auto-restart for short-circuit and open loop faults

? Output overvoltage protection (OVP)

? Line input overvoltage protection (OVL)

? Hysteretic over-temperature protection (OTP)

? Extended creepage between DRAIN pin and all other pins improves

field reliability

? 725 V MOSFET rating for excellent surge withstand

? Nemko (EN62368-1) and CB (IEC62368-1) certifications

EcoSmart?– Extremely Energy Efficient

? IC standby supply current <100 mA

? On/Off control provides constant efficiency over a wide load range

? Easily meets all global energy efficiency regulations

? No-load consumption <30 mW with external bias

Applications

? Home and building automation

? Dimmers, switches and sensors with and w/o Neutral wire

? Appliances

? IoT and industrial controls