iW1819 Datasheet | Renesas

Description The i W1819 integrates a high performance AC/DC power supply controller using digital control technology and a power BJT switch in one package to enable pact 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 i W1819 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 pensation ponents 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 i W1819 can achieve both the highest average efficiency and less than 30m W no-load power consumption. And, the i W1819 can start-up into a wide range of capacitive loads at 5V to 12V or higher output voltages, making it ideal for networking, set-top box and home appliance power supply applications. 2 Features - Optimized for 12V/1.5A AC/DC adapters with < 30m W no-load power consumption at 230VAC and fast dynamic response - Accu Switch™ technology - integrated 800V bipolar junction transistor (BJT) - Adaptively controlled soft-start enables fast and smooth start-up for a wide range of capacitive loads (from 330μF to 6,000μF) - Very tight constant voltage and constant current regulation over entire operating range - Prim Accurate™ primary-side feedback eliminates optocoupler and simplifies design - EZ-EMI™ design enhances manufacturability - Intrinsically low mon mode noise - Optimized 72k Hz maximum PWM switching frequency achieves best size and...