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iW1819

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Quasi-Resonant PWM Controller

iW1819 18W AccuSwitchTM Quasi-Resonant PWM Controller with Integrated 800V Power BJT 1 Description The iW1819 integrates...



iW1819

Renesas


Octopart Stock #: O-1517991

Findchips Stock #: 1517991-F

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Description
iW1819 18W AccuSwitchTM Quasi-Resonant PWM Controller with Integrated 800V Power BJT 1 Description 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 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 < 30mW no-load ...




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