Date
02/24/2011
PDF
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High Voltage Isolated Monolithic Flyback Regulator
Linear Technology Corporation announces the LT3512, a high voltage isolated monolithic flyback regulator that significantly simplifies the design of an isolated DC/DC converter. No optocoupler, third winding or signal transformer is required for feedback since the output voltage is sensed from the primary-side flyback signal. The LT3512 operates over a 4.5V to 100V input voltage range, has a 420mA, 150V power switch and delivers up to 4.5 watts of output power, making it well suited for a wide variety of telecom, datacom, automotive, industrial and medical applications. The LT3512 operates in a boundary mode, a current-mode control switching scheme, resulting in better than +/-5% regulation over the full line, load and temperature range. Boundary mode, also known as critical conduction mode, permits the use of a smaller transformer compared to equivalent continuous conduction mode designs. The output voltage is easily set by two external resistors and the transformer turns ratio. Several transformers identified in the data sheet can be used for a variety of applications. The high level of integration results in a simple, clean, tightly regulated application solution to the traditional challenge of isolated power delivery. Summary of Features: LT3512
