Skip to main content
Log in
Texas Instruments LM4817MHX/NOPB — Analog & Data Acquisition

Texas Instruments LM4817MHX/NOPB Class AB Audio Amp

MPNLM4817MHX/NOPB
End of Life

Texas Instruments Boomer® LM4817MHX/NOPB, Class AB audio amplifier, 2-Channel (Stereo), 1.5W x 2 @ 8Ohm, 3V ~ 5.5V supply, 28-HTSSOP, -40°C ~ 85°C, Active, ROHS3.

$1.23Ref. price · indicative, final on quote
Texas Instruments LM4817MHX/NOPB datasheet (PDF)
Packaging28-PowerTSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
SeriesBoomer®
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM4817MHX/NOPB specifications
ParameterValue
TypeClass AB
SeriesBoomer®
Output type2-Channel (Stereo)
MountingSurface Mount
Supply voltage3V ~ 5.5V
Max output power x channels @ load1.5W x 2 @ 8Ohm
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
FeaturesDepop, Shutdown, Thermal Protection
Case28-PowerTSSOP (0.173\", 4.40mm Width)

Product details

Stereo Class AB amplifier for portable and line-powered audio

The Texas Instruments LM4817MHX/NOPB is a Boomer® series Class AB stereo audio amplifier delivering 1.5W per channel into an 8Ω load from a 3V to 5.5V supply. Typical applications include portable speakers, docking stations, LCD monitors, and automotive head units where a simple linear audio stage is preferred over a switching Class D design.

Supply headroom and thermal budget

Rated for 3V to 5.5V, this part runs comfortably from a single lithium-ion cell or a regulated 5V rail.

Built-in depop, shutdown, and thermal protection

The LM4817MHX/NOPB integrates pop-suppression circuitry (depop), a shutdown pin for power-save, and thermal-overload protection. The shutdown feature is active-low — pulling the pin low mutes the outputs and drops quiescent current to microamp levels. No external mute transistor or click-elimination RC network is needed for basic operation, though a small capacitor on the bypass pin (per the app note) further reduces turn-on transients.

Frequently asked questions

Does LM4817MHX/NOPB require external shutdown circuitry?

No — the shutdown function is integrated. Driving the shutdown pin low (below 0.8V typical) places the amplifier into a low-power state. A logic-level GPIO or a simple SPST switch to ground is sufficient; no external transistor or level shifter is needed.

How does LM4817MHX/NOPB compare to LM4818MHX?

The LM4818MHX is a mono (single-channel) Class AB amplifier in the same Boomer® family, while the LM4817MHX/NOPB is a stereo (2-channel) device. Both operate from a 3V to 5.5V supply and share the same package footprint, but the LM4818 delivers higher output power per channel (2.2W into 3Ω typical) at the cost of a second channel. For stereo applications the LM4817 is the correct choice; for a single higher-power channel the LM4818 fits.