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High Efficiency High Precision Buck Constant Current Driver

MT7819BD is a high precision LED constant current controller 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 MT7819BD 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, and the input compensation, MT7819BD can achieve precise output current and excellent line regulation and load regulation.
MT7819BD embedded with internal power MOSFET, it can achieve simplified peripheral circuits and low BOM cost.
MT7819BD has wide working voltage range, which is suitable for full-range AC input. MT7819BD provides various protection features to improve the system reliability, including over current protection (OCP), short circuit protection (SCP), adjustable over voltage protection (OVP) and thermal adjustment, etc.

 Critical Conduction Mode, insensitive to the inductance.
 High efficiency (up to 95%)
 Highly accurate constant LED current
 Cycle-by-cycle current limiting
 LED short circuit protection
 Adjustable OVP through external resistor
 Leading edge blanking technique
 Under-voltage lockout (UVLO) protection
 Thermal adjustment
 Available in DIP7 package

 LED bulb, LED tube, LED signal and landscape lamp
 LED stage light, LED candle light, LED corn light, etc.
 General purpose constant current source
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