The LM3406 family 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 low-power shutdown and thermal shutdown protection.
● LM3406HV-Q1
● Automotive Grade Device
● AEC-Q100 Grade 1 Qualified
● Operating Ambient Temperature: –40°C to 125°C
● Integrated 2.0A MOSFET
● VIN Range 6V to 42V (LM3406)
● VIN Range 6V to 75V (LM3406HV)
● VIN Range 6V to 75V (LM3406HV-Q1)
● 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 Compensation
● Low Power Shutdown
● Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
● Thermal Shutdown Protection
● TSSOP-14 Package
