The iW1819 integrates a high performance AC/DC power supply controller using digital control technology and a power BJT switch in one package to enable compact peak current mode PWM flyback power supplies. The device operates in quasi-resonant mode and features multiple key protection features, allowing designs with improved efficiency and lower EMI, while lowering the bill of material cost. 

The iW1819 features a distinctive soft-start scheme, which allows for fast and yet smooth start-up with both small and large capacitive loads. It removes the need for a secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for loop compensation components while maintaining stability across all operating conditions. The pulse-by-pulse waveform analysis allows for fast dynamic load response. The built-in power limit function enables optimized transformer design for a wide input voltage range.

Dialog’s innovative, proprietary technology ensures that power supplies built with the iW1819 can achieve both the

highest average efficiency and less than 30mW no-load power consumption. And, the iW1819 can start-up into a wide

range of capacitive loads at voltages greater than 5V, making it ideal for networking, set-top box and home appliance

power supply applications. For 5V applications, please see the iW1820.