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Texas Instruments LM3406HVMH/NOPB — Analog & Data Acquisition

LM3406HVMH/NOPB LED Driver, Buck, 75V, 1.5A, PWM Dimming

MPNLM3406HVMH/NOPB
End of Life

Texas Instruments LM3406HVMH/NOPB, DC DC Regulator, Step-Down (Buck) LED Driver, PWM Dimming, 6V–75V Input, 1.5A Output, 10kHz–1MHz, -40°C–125°C, 14-HTSSOP.

$3.87Ref. price · indicative, final on quote
Texas Instruments LM3406HVMH/NOPB datasheet (PDF)
Packaging14-TSSOP (0.173", 4.40mm Width) Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM3406HVMH/NOPB specifications
ParameterValue
TypeDC DC Regulator
MountingSurface Mount
Supply voltage75V
Current - output (Channel)1.5A
Frequency10kHz ~ 1MHz
I/O channels1
Operating temperature-40°C ~ 125°C (TJ)
DimmingPWM
PackageTube
TopologyStep-Down (Buck)
ApplicationsAutomotive, Lighting
Case14-TSSOP (0.173\", 4.40mm Width) Exposed Pad
Internal switchYes

Product details

The Texas Instruments LM3406HVMH/NOPB is a constant-current step-down (buck) LED driver with an integrated 1.5A switch, rated for a 6V to 75V input supply. PWM dimming is supported directly, making it suitable for automotive exterior lighting, industrial high-bay fixtures, and architectural LED strings where the bus voltage can run up to 75V.

What the 75V input and 1.5A output mean for the BOM

A 75V maximum input voltage is the headline rating on this part. It means the LM3406HVMH/NOPB can be fed directly from a 48V nominal industrial rail or an automotive 24V battery bus (including load-dump transients) without an external pre-regulator. The 1.5A continuous output current drives a single high-power LED or a series string of lower-current LEDs, depending on the forward voltage stack.

The LM3406HVMH/NOPB is active and ROHS3 compliant. No AEC-Q grade is listed.

Frequently asked questions

Does LM3406HVMH/NOPB support PWM dimming for automotive lighting?

Yes, PWM dimming is listed as a key feature, and the part is rated for the -40°C to 125°C junction temperature range typical of automotive under-hood environments. However, no AEC-Q100 grade is cited — confirm qualification status for your specific application.