LM3406, LM3406HV, LM3406HV-Q1
SNVS512E – SEPTEMBER 2008 – REVISED MARCH 2014 LM3406 1.5-A, Constant Current, Buck Regulator for Driving High Power LEDs
1 FEATURES 3 DESCRIPTION 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. 1 LM3406HV-Q1
– Automotive Grade Device
– AEC-Q100 Grade 1 Qualified
– Operating Ambient Temperature: –40°C to
125В°C
Integrated 2.0A MOSFET …
