My system need three Isolator power and totol 70W, LM5023 is right solution ?
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Hello Wei Chun,
Thank you for your interest in the LM5023 Quasi-resonant Flyback controller. Certainly this device is suitable for a flyback design at 70-W output power level. It is optimized for off-line operation although can also be used with a DC input.
TI has many other off-line (AC input) and DC-DC flyback controllers to choose from. Can you please add more detail to your system description to make it easier to select the best controller to meet your requirements?
Regards,
Ulrich