LM4871MM

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LM4871MM

IC AMP CLASS AB MONO 3W 8VSSOP

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規格

Series Boomer®
Part Status Obsolete
Type Class AB
Output Type 1-Channel (Mono)
Max Output Power x Channels @ Load 3W x 1 @ 3Ohm
Voltage - Supply 2V ~ 5.5V
Features Shutdown, Thermal Protection
Mounting Type Surface Mount
Operating Temperature -40°C ~ 85°C (TA)
Supplier Device Package 8-VSSOP
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Base Product Number LM4871

概述

Description

LM4871MM is a dual-channel, low-voltage audio power amplifier from TI/National (LM4871 family) in an MSOP-8 (MM) package. It’s designed for portable/consumer devices and provides two stereo amplifier channels with Class-AB operation, suitable for driving small loudspeakers from a single low-voltage supply.
Key points:
- Package: MSOP-8 (MM variant)
- Supply: single-supply operation in the low-voltage range (roughly 2.7–5.5 V)
- Output: two amplifier channels (stereo) for small speakers
- Features: designed for low external component count with built-in protection options (e.g., thermal/short-circuit protection)
- Typical uses: mobile phones, portable audio devices, handheld gadgets, compact speaker systems
For precise electrical specs (output power, quiescent current, gain, pinout) and recommended circuits, consult the LM4871/MM datasheet and TI’s packaging information.

Features

Here are the typical features of the LM4871MM (TI):
- Mono audio power amplifier (Class-AB)
- Single-supply operation: 2.7V to 5.5V
- Pop-free/mute or soft-start on power-up
- Internal protection: thermal shutdown, current limit, and short-circuit protection
- Efficient biasing with low quiescent current
- Suitable for driving small speakers in portable devices
- Package: 8-pin MSOP (LM4871MM) for compact PCB footprint
Note: Output power depends on load and supply voltage (roughly up to about 1W into 4Ω at 5V typical).

Package

LM4871MM uses an 8-pin MSOP (MSOP-8) surface-mount package.

Pinout

LM4871MM is an 8‑pin device (MSOP-8 package). It is a single‑channel (mono) audio power amplifier with a shutdown control, used to drive a speaker from a single supply.

Manufacturer

Manufacturer: Texas Instruments (TI). TI is a multinational American semiconductor company that designs and manufactures analog, mixed-signal, and embedded processing ICs. It acquired National Semiconductor (the original maker of LM4871) in 2011.

Application

LM4871MM is a low-power audio power amplifier for portable, battery-powered electronics. Typical applications include:
- Mobile phones/handsets
- Portable media players (MP3/PMPs)
- Bluetooth receivers and compact wireless speakers
- Handheld game consoles and voice recorders
- Toys and other small consumer electronics needing speaker drive

Equivalent

There isn’t a publicly listed direct cross-reference for LM4871MM. Closest substitutes are:
- TI LM4871 in other packages (e.g., SOIC-8)
- Other vendors’ 1–1.5 W single‑channel audio amps with similar Vcc and load (pin/footprint permitting)
For precise replacements, please share your target specs (supply voltage, desired output power, speaker impedance, and package). I can propose exact drop-in or pin‑compatible options.

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