LM3406/LM3406HV—PowerWise® 1.5A Constant Current Buck Regulator for Driving High Power LEDs-EEWORLD

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Working Principle Typical Application Circuit Diagram
LM3406/06HV is a buck regulator with a wide input voltage range, low reference voltage, and dual-wire dimming function. Therefore, LM3406/06HV is an ideal constant current supply source for LEDs and provides a forward current of up to 1.5A. In addition, this chip adopts a controlled on-time (COT) structure, in which a comparator and a one-time start timer are built in. Unlike a fixed clock, the start timer changes inversely with the changes in input and
output voltages. The LM3406/06HV chip has a built-in integration circuit that ensures average current output. Whenever the converter adopts continuous conduction mode (CCM) operation, the controlled on-time structure ensures that the switching frequency remains constant regardless of the changes in input and output voltages. Therefore, the output current of LM3406/06HV is extremely accurate, and the transient response is also extremely fast, which can ensure that the switching frequency remains constant under different conditions.

Reference address：LM3406/LM3406HV—PowerWise® 1.5A Constant Current Buck Regulator for Driving High Power LEDs

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