Piezoelectric transformers are an alternative to wire wound magnetic transformers. They behave differently and have a number of advantages, e.g., they are lighter and smaller, and they have excellent electrical isolation and no magnetic stray flux. For these reasons piezoelectric transformers have been used in applications such as high voltage generators in CCFL backlighting and inverters for laptop computers. High Voltage DC-DC Piezo Converters are generally available in ratings as 2kVdc/4W; 5kVdc/5W and 10kVdc/5W