Photoflash Capacitor Charger Has Fast Efficient Charging

Posted on Oct 20, 2012

These photoflash, or strobe, capacitors range in value from a hundred microfarads to over a millifarad, with target output voltages above 300V. Traditional strobe capacitor charging methods are either inefficient or require software overhead. The LT3420 provides a compact, simple to use and efficient charger solution that requires no software, saving space, battery life, design time and cost. LT3420 charger circuits typically achieve efficiencies greater than 75%. The LT3420 includes important features such as automatic capacitor charge refresh and control/indicator pins which make it highly flexible and easy to use. Its versatility allows it to be used in applications that require a simple standalone photoflash charger as well as applications where it is completely controlled by a microprocessor (described below). No voltage divider is needed on the high voltage output.

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