iW1821 12W AccuSwitch Quasi-Resonant PWM Controller with Integrated 1200V Power BJT Product Summary
●General Description：
■The iW1821 integrates a high performance AC/DC power supply controller using digital control technology and a 1200V 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 iW1821 features a distinctive soft-start scheme, which allows for fast and yet smooth start-up with both small andlarge capacitive loads. It removes the need for a secondary feedback circuit while achieving excellent line and loadregulation. 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 limitfunction enables optimized transformer design for a wide input voltage range.
■Dialog’s innovative, proprietary technology ensures that power supplies built with the iW1821 can achieve both thehighest average efficiency and less than 50mW no-load power consumption. And, the iW1821 can start-up into a wide range of capacitive loads with output voltages from 5V to 12V and above, making it ideal for smart meters and system power supplies for industrial and home appliance applications that require a broad input voltage range.
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Quasi-Resonant PWM Controller 、 high performance AC/DC power supply controller |
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[ Smart Meters ][ AC/DC power supplies ][ home appliances ][ industrial applications ] |
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Datasheet |
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Please see the document for details |
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SO-10 |
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English Chinese Chinese and English Japanese |
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27-Sep-2019 |
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Rev. 0.2 |
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575 KB |
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