Applications
MT7822B
  • Introduction
  • Softwares
  • Applications
  • Samples

MT7822B is a high precision LED constant current control chip operating at critical conduction mode (CRM) with zero current switched-on and peak current switched-off. It’s mainly targeted for non-isolated buck LED power systems. Critical conduction mode ensures that the MT7822B turns on the internal power MOSFET when the inductor current reaches zero, reducing the power MOSFET switching loss, and achieving more than 95% efficiency. With critical conduction mode, MT7822B outputs high accuracy LED current, and further achieves excellent line regulation and load regulation. It’s insensitive to inductance and the I-shape inductor can be used. MT7822B is intended for simplified peripheral circuits, low BOM cost application with an internal power MOSFET. MT7822B has wide working voltage range, which is suitable for full-range AC input or 60V - 400V DC input voltage. MT7822B provides various protection features to enhance the system reliability, including over current protection (OCP), short circuit protection (SCP), and thermal adjustment, etc.

 

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