Analog Devices LT3748EMS | Demoboard DC1557A

Description

Demonstration circuit 1557A is an Non-Opto Isolated Flyback Converter featuring LT3748EMS. It is designed for 12V output from a 30V to 75V DC input. The output current is up to 1A. The part senses the isolated output voltage directly from the primary side flyback waveform duringthe off time of the power switch. No third winding, opto-coupler or signal transformer is required for regulation. A minimum load of approximately 2% of maximum load is required on the output. Table 1 summarizes theperformance of the demo board.

The demo circuit can be easily modified for applications of different input, and output voltages/currents. Some pre-designed EP10, EP13 transformers from vendors such as Wurth Electronics, Sumida, Pulse Engineeringand Coilcraft can be assembled on the board. The LT3748EMS is a high input voltage isolated flyback controller operating with input supply voltages from 5V to 100V. The LT3748EMS utilizes boundary mode operationto provide a high efficiency, small size solution with improved load regulation of ±5% over the full line, load and temperature ranges. The LT3748EMS is well suited for a wide variety of industrial, automotive, medical, telecom, data-com applications, where regulated isolated output isrequired.

The LT3748EMS datasheet gives a complete description of the part, operation and application information. The datasheet should be read in conjunction with this quick start guide for Demo Circuit 1557A.

More information

• Datasheet
• IC product information