The DC1817B demonstration board is an off line isolated flyback converter featuring LT3798EMSE device. The LT3798EMSE 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 LT3798EMSE 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. The demo board provides a single constant voltage output of 24V at 2A. It is optimized to operate over a wide AC input voltage range (90VAC to 265VAC, 47Hz to 63Hz). Output voltage accuracy stays within ±5% over the whole input voltage and load range. It provides a high power factor (>0.95) enabling the design to be used worldwide. It is also designed to comply with the IEC 61000-3-2 class D harmonics standard and the EN55015B conducted EMI standard.
- 87% efficiency
- 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 optocoupler required
- Constant current and constant voltage regulation
- Accurate regulated voltage and current (±5% typical)
- Energy star compliant (less than 0.5W no load operation)
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