HIGH CURRENT OFF LINE POWER SUPPLY

2009-5-12 11:01:35 2987

0 Design Engineers are constantly pushed to reduce the space and cost of the power supply in their systems. For supplies between 2W and 6W that can operate over the world wide range of input voltage and frequency the options were flyback switching power supply or a high voltage linear regulator. The typical transformer supply requires AC voltage sensing and active tap switching, which is not common practice. The flyback switching power supply is the most efficient, but is costly, complex and requires special EMI filters for suppression. The high voltage linear regulator is simple in design, cheap, but not practical at this power level. The transformer supply offers isolation and better efficiency but is limited to a small range of input voltage and frequency, is bulky, costly, and can be acoustically noisy. An alternative solution is to configure the HV-2405E as a control chip to drive a MOSFET. This solution is not as efficient as the switching or transformer supplies and does not provide isolation, but is a low cost, compact (no transformer) 2W to 6W power supply accepting the world wide range of input voltage and frequency. j14o3tdL.pdf (79.38 KB, 下载次数: 1 ) 0
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