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Texas Instruments LM4675SD/NOPB — Logic ICs
Texas Instruments

LM4675SD/NOPB Class D Audio Amplifier, 2.7W Mono, 8-WSON

MPNLM4675SD/NOPB
End of Life

Texas Instruments Boomer®, PowerWise® series, LM4675SD/NOPB, Class D Audio Amplifier, 1-Channel (Mono), 2.7W x 1 @ 4Ohm, 2.4V ~ 5.5V supply, Surface Mount, 8-WFDFN Exposed Pad, -40°C ~ 85°C.

$2.18Ref. price · indicative, final on quote
LM4675SD/NOPB datasheet
Packaging8-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

LM4675SD/NOPB Technical Specifications
ParameterValue
TypeClass D
SeriesBoomer®, PowerWise®
Output type1-Channel (Mono)
Mounting typeSurface Mount
Voltage2.4V ~ 5.5V
Max output power x channels @ load2.7W x 1 @ 4Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
FeaturesDepop, Differential Inputs, PWM, Short-Circuit and Thermal Protection, Shutdown
Case8-WFDFN Exposed Pad

Product details

Class D mono amplifier for portable audio

The Texas Instruments LM4675SD/NOPB is a Class D mono audio amplifier from the Boomer® and PowerWise® series, delivering 2.7W into a 4Ω load from a single 2.4V to 5.5V supply. Typical applications include portable speakers, mobile phones, GPS units, and other battery-powered audio devices where efficiency and board space are tight.

The 2.7W output into 4Ω is the maximum continuous power before clipping at the rated supply and THD. For a 3.7V Li-ion battery, expect around 1.5W into 4Ω at lower distortion — still enough for a small enclosure. The 2.4V to 5.5V supply range covers single-cell Li-ion down to near-depletion and 5V USB rails, so the amplifier keeps running as the battery sags.

Active lifecycle and ROHS3 compliance

The NOPB suffix confirms lead-free soldering compatibility with standard reflow profiles.

Package and thermal handling

The exposed pad is the main heat path — without it, the device will thermally cycle at sustained 2.7W into 4Ω.

Frequently asked questions

Does LM4675SD/NOPB require an external output filter?

For long speaker wires or EMI-sensitive applications, a small ferrite bead and capacitor may still be added, but the part is designed for filterless operation in most cases.