• Bidirectional fly-back converters may be used in switched mode charging circuits for high voltage charging of capacitive loads.
• The current state of art involves several methods for controlling bidirectional fly-back converters, but the required output voltage may not be obtained programmable, for capacitive loads in minimum time and high efficiency.

The invention discloses a device and a method for controlling a bidirectional fly-back converter to achieve a programmable high output voltage for capacitive loads.

• The device includes a bidirectional flyback converter, high bandwidth comparators, isolated feedback sensing circuit, a digital to analog converter, a low pass filter and  a complex programmable logic device.

Method:

• Determining difference between magnitude of the actual output voltage (Vo) and required reference output voltage (Vref ) of the converter.
• Dynamic modulation of energy per charge pulse or energy per discharge pulse based on variation in demand energy determined.

The method of optimizing design is given by the following steps:

• Defining input and output requirements of the converter
• Calculating the initialization parameters for the converter
• Designing a plurality of energy based models
• Computing figure of merit for each model till max/min desired output voltage is obtained
• Selection of a design with optimal figure of merit by comparing the charging and discharging time and efficiency.