LM3406 Datasheet | National Semiconductor

Description The LM3406/06HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 2.0A (typical) for step-down (Buck) regulators. Controlled on-time with true average current and an external current sense resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. LED dimming via pulse width modulation (PWM) is achieved using a dedicated logic pin or by PWM of the power input voltage. The product feature set is rounded out with lowpower shutdown and thermal shutdown protection. Features - Integrated 2.0A MOSFET - VIN Range 6V to 42V (LM3406) - VIN Range 6V to 75V (LM3406HV) - True average output current control - 1.7A Minimum Output Current Limit Over Temperature - Cycle-by-Cycle Current Limit - PWM Dimming with Dedicated Logic Input - PWM Dimming with Power Input Voltage - Simple Control Loop pensation - Low Power Shutdown - Supports All-Ceramic Output Capacitors and Capacitor- less Outputs - Thermal Shutdown Protection - e TSSOP-14 Package Applications - LED Driver - Constant Current Source - Automotive Lighting - General Illumination - Industrial Lighting.Data Sheet.net/ Typical Application © 2010 National Semiconductor Corporation 300203 .national. Datasheet pdf - http://..co.kr/ LM3406/LM3406HV Connection Diagram LM3406/06HV...