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Texas Instruments LM4850LD — Logic ICs
Texas Instruments

LM4850LD Class AB Audio Amplifier

MPNLM4850LD
End of Life

Texas Instruments Boomer® series LM4850LD, Class AB audio amplifier, 1-Channel (Mono) with Stereo Headphones output, 1.9W x 1 @ 3Ohm max power, 2.4V ~ 5.5V supply, -40°C ~ 85°C, 14-WFDFN Exposed Pad package, Surface Mount.

$0.51Ref. price · indicative, final on quote
LM4850LD datasheet
Packaging14-WFDFN Exposed Pad
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LM4850LD Technical Specifications
ParameterValue
TypeClass AB
SeriesBoomer®
Output type1-Channel (Mono) with Stereo Headphones
Mounting typeSurface Mount
Voltage2.4V ~ 5.5V
Max output power x channels @ load1.9W x 1 @ 3Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
Case14-WFDFN Exposed Pad

Product details

Class AB mono amplifier with integrated headphone drive

The Texas Instruments LM4850LD is a Class AB audio amplifier from the Boomer® series, delivering 1.9W into a 3Ω mono load while also providing a separate stereo headphone output. It operates from a 2.4V to 5.5V supply, making it suitable for single-cell Li-ion or 3.3V/5V logic rails in portable and fixed audio equipment.

1.9W into 3Ω — sizing the speaker and thermal budget

The 1.9W into 3Ω rating sets the maximum undistorted output into a low-impedance speaker.

Supply range and logic compatibility

The amplifier's input sensitivity is referenced to the supply mid-rail, so a 3.3V logic-level audio codec output will drive it to full swing when the gain is set appropriately. At 2.4V the output power drops — check the headroom against your required SPL if the design must operate near battery end-of-life.

For BOM planning this removes the obsolescence risk that haunts older audio amplifier families.

Frequently asked questions

What is the difference between LM4850LD and LM4850?

The LM4850LD is the lead-free (non-RoHS) variant in a 14-WFDFN package, while the base LM4850 typically comes in a different package option. The core Class AB amplifier performance and 1.9W into 3Ω rating are the same. The LD suffix specifically denotes the exposed-pad WSON package for improved thermal performance.