LT3798MPMSE#PBF

LT®3798 is a constant-voltage/constant-current isolated flyback controller that combines active power factor correction (PFC) with no optocoupler required for output voltage feedback into a single-stage converter. A LT3798 based design can achieve a power factor of greater than 0.97 by actively modulating the input current, allowing compliance with most harmonic current emission requirements. This is well-suited for a wide variety of offline applications. The input range can be scaled up or down, depending mainly on the choice of external components. Efficiencies higher than 86% can be achieved with output power levels up to 100W. Application includes offline 5W to 100W+ applications, high DC VIN isolated applications, and offline bus converter.

• Isolated PFC Flyback with minimum number of external components
• VIN and VOUT limited only by external components
• Active power factor correction, low harmonic distortion
• No opto-coupler required, constant-current and constant-voltage regulation
• Input voltage range from 10 to 38V (TA = 25°C. VIN = 18V, INTVCC = 11V)
• Typical VIN quiescent current is 60µA (VEN/UVLO = 0.2V, TA = 25°C)
• Typical VIN shunt regulator voltage is 40V (I = 1mA, TA = 25°C. VIN = 18V, INTVCC = 11V)
• 16-lead plastic MSOP package
• Temperature rating range from -55°C to 150°C

附註

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