Quasi-Resonant type AC/DC converter IC BM1Q0XX series Quasi-Resonant converter Technical Design
This application note describes the design of Quasi-Resonant converters using ROHM’s AC/DC converter IC BM1Q0xx series devices. It explains the selection of external components and provides PCB layout guidelines. Please note that all performance characteristics have to be verified. They are not guaranteed by the PCB layout shown here.
The BM1Q0xx series of ICs are AC/DC converters for Quasi-Resonant switching, incorporating a built-in starter circuit having withstanding voltage of 650V. Use of external switching MOSFET and current detection resistors, provides a higher degree of design freedom. Power efficiency is improved by the built-in starter circuit and the reduction of switching frequency under light load conditions.
Key features:
●Quasi-resonant method .
●Built-in 650V tolerate start circuit .
●Low power when load is light (Burst operation) .
●Maximum frequency control (120kHz) .
●Frequency reduction function .
●AC voltage correction function .
●VCC pin : under voltage protection .
●VCC pin : overvoltage protection .
●Over-current protection (cycle-by-cycle) .
●OUT pin : H voltage 12V clamp .
●Soft start .
●ZT trigger mask function .
●ZT Over voltage protection .
●FB Over Load protection [Auto-restart] .
●CS pin open protection [Auto-restart].
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[ AC adapters ][ TVs ][ household appliances ][ vacuum cleaners ][ humidifiers ][ air filters ][ air conditioners ][ refrigerators ][ induction heating cookers ][ rice cookers ] |
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Application note & Design Guide |
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Please see the document for details |
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SOP-J8 |
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English Chinese Chinese and English Japanese |
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2014.08 |
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Rev.A |
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619 KB |
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