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LM3406HVMHX/NOPB
1.5A Constant Current Buck Regulator for Driving High Power LEDs
GND
DIM
BOOT SW
RON
VIN,VINS
RONCIN
VIN
COMP
LM3406, LM3406HV, LM3406HV-Q1SNVS512E –SEPTEMBER 2008–REVISED MARCH 2014
LM3406 1.5-A, Constant Current, Buck Regulator for Driving High Power LEDs FEATURES LM3406HV-Q1– Automotive Grade Device AEC-Q100 Grade1 Qualified– Operating Ambient Temperature: –40°C125°C• Integrated 2.0A MOSFET external current sense resistor allow the converter VIN Range 6Vto 42V (LM3406) output voltage to adjust as needed to delivera
constant current to series and series-parallel• VIN Range 6Vto 75V (LM3406HV) connected LED arraysof varying number and type.• VIN Range 6Vto 75V (LM3406HV-Q1) LED dimming via pulse width modulation (PWM)is• True Average Output Current Control achieved usinga dedicated logic pinor by PWMof
the power input voltage. The product feature setis• 1.7A Minimum Output Current Limit Over
rounded out with low-power shutdown and thermalTemperature
shutdown protection.• Cycle-by-Cycle Current Limit
The LM3406HV-Q1is AEC-Q100 grade1 qualified.• 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
APPLICATIONS LED Driver Constant Current Source Automotive Lighting General Illumination Industrial Lighting
3.1 TYPICAL APPLICATION
