Linear Technology Corporation (Linear Technology Corporation) introduced a high input voltage isolated flyback DC / DC controller LT3748H, guaranteed junction temperature up to 150 ° C Operating. This device greatly simplifies the design of isolated DC/DC converters because the output voltage is sensed from the main-ended flyback signal, so no optoisolator, third winding or signal transformer is required for feedback. Operating over an input voltage range of 5V to 100V and driving an external N-channel power MOSFET, the LT3748 is ideal for a wide range of automotive, industrial, telecom and datacom applications. The LT3748 operates in a boundary mode, current mode control switch circuit to achieve ±5% typical regulation over voltage, load, and temperature. The boundary mode also allows the use of smaller transformers compared to a functionally consistent continuous conduction mode design. The output voltage is very easy to set by the two external resistors and transformer turns ratio. The data sheet indicates that several off-the-shelf transformers are available for a variety of applications. The use of high integration and boundary mode operation provides a simple application solution for isolated power problems that are traditionally difficult to solve. Other features include an integrated low dropout regulator for IC power supplies, programmable soft start, undervoltage lockout, adjustable current limit, and output voltage temperature compensation. The LT3748H is available in a small MSOP-16 package with 4 pins removed for additional high voltage pin spacing. The 1,000-piece purchase price is $3.71 per piece. For more information, please visit Dongguan Yijia Optoelectronics Co., Ltd. , https://www.everbestlcdlcm.com