LM3406HVMHX/NOPB National Semiconductor, LM3406HVMHX/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3406HVMHX/NOPB
• Description: IC LED DRVR HP CONS CURR 14TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: High Power, Constant Currentr

Specifications of LM3406HVMHX/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive
• Type - Secondary: White LED
• Frequency: 1MHz
• Voltage - Supply: 6 V ~ 75 V
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP Exposed Pad, 14-eTSSOP 14-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1.5A
• Internal Switch(s): Yes
• Efficiency: 96%
• For Use With: 876-1003 - LM3406 LED DRIVER EVAL BOARDLM3406MHEVAL - BOARD EVAL FOR LM3406MH
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: LM3406HVMHX

© 2010 National Semiconductor Corporation
1.5A Constant Current Buck Regulator for Driving High
Power LEDs
General Description
The LM3406/06HV are monolithic switching regulators de-
signed 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.
Typical Application
300203
LM3406/06HV
Features
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Applications
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Integrated 2.0A MOSFET
V
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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
eTSSOP-14 Package
LED Driver
Constant Current Source
Automotive Lighting
General Illumination
Industrial Lighting
IN
IN
Range 6V to 42V (LM3406)
Range 6V to 75V (LM3406HV)
30020301
February 8, 2010
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