The LM3406/06HV are monolithic switching regulators designedto deliver constant currents to high power LEDs. Idealfor automotive, industrial, and general lighting applications,they contain a high-side N-channel MOSFET switch with acurrent limit of 2.0A (typical) for step-down (Buck) regulators.Controlled on-time with true average current and an externalcurrent sense resistor allow the converter output voltage toadjust as needed to deliver a constant current to series andseries-parallel connected LED arrays of varying number andtype. LED dimming via pulse width modulation (PWM) isachieved using a dedicated logic pin or by PWM of the powerinput voltage. The product feature set is rounded out with lowpowershutdown and thermal shutdown protection.
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