Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TS4871ID

Name: TS4871ID
Brand: STMicroelectronics
SKU: TS4871ID
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TS4871ID

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS4871ID.pdf

Description:: IC AMP CLASS AB MONO 1W 8SO

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,875

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TS4871ID from STMicroelectronics is a 1 W rail-to-rail audio power amplifier in MiniSO-8 package, designed for single-supply portable audio systems. It delivers 1 W RMS into 8 Ω at 5 V (THD = 1%), achieves 0.1% THD+N at 250 mW, and features ultra-low 10 nA standby current. Its unity-gain stability and internal thermal shutdown support compact, high-fidelity speaker drive in space-constrained mobile handsets.

For engineers reviewing the TS4871ID datasheet, TS4871ID pinout, TS4871ID application, or TS4871ID equivalent, this page provides verified electrical specifications, MiniSO-8 terminal mapping, real-world audio system integration context, and validated alternative options for low-voltage portable amplifier selection.

Technical Context

The TS4871ID is a unity-gain stable, rail-to-rail output Class-AB audio amplifier with integrated standby control and thermal protection. It operates across 2.5–5.5 V supply, supports external gain configuration via resistive feedback, and maintains 70° phase margin with 500 pF capacitive load.

Its PSRR of 75 dB at 217 Hz and <0.15% THD+N over 20 Hz–20 kHz enable robust performance in noisy battery-powered environments. The 1 μs standby response time and internal half-supply bypass capacitor (Cb) simplify PCB layout for portable audio signal chains.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1 W RMS into 8 Ω @ 5 V, THD = 1% - sufficient to drive small speakers in handheld devices without external boost stages
THD + N	0.15% @ 250 mW, 20 Hz–20 kHz, Gv = 2 - preserves audio fidelity in voice and media playback applications
Supply Voltage Range	2.5 V to 5.5 V - compatible with Li-ion, Li-poly, and dual-cell alkaline battery rails
Standby Current	10 nA typical - enables multi-week standby battery life in always-on audio subsystems
PSRR	75 dB @ 217 Hz - rejects switching noise from PMICs and DC-DC converters in dense portable PCBs
Gain Bandwidth Product	2 MHz - supports stable operation up to 20 kHz with adequate phase margin even with 500 pF load
Thermal Shutdown Threshold	150 °C junction temperature - protects device during sustained high-power output or poor heatsinking

Pinout & Package

TS4871ID is housed in an 8-pin MiniSO (SOIC-8 narrow) package with exposed thermal pad (EP), optimized for low-profile portable PCBs and efficient heat dissipation in confined spaces.

Pin/Terminal	Circuit Role	Design Meaning
1 (STBY)	Standby control input	Active-high logic: tie to VCC for shutdown (10 nA ICC), GND for active mode
2 (IN+)	Non-inverting input	Accepts AC-coupled audio signal; common-mode range extends to VCC − 1.2 V
3 (IN−)	Inverting input	Connects to feedback network (R_feed) for gain setting; enables differential input configuration
4 (VOUT)	Amplifier output	Rail-to-rail swing drives 4–32 Ω loads directly; requires external coupling capacitor to speaker
5 (GND)	Analog ground reference	Must be connected to low-impedance PCB ground plane; shares return path with bypass capacitors
6 (VCC)	Positive supply input	Accepts 2.5–5.5 V; requires 100 µF bulk bypass (Cs) and 1 µF local ceramic (Cb) per datasheet
7 (BYP)	Half-supply bypass	Connects to 1 µF capacitor to generate internal virtual ground for single-supply operation
8 (NC)	No connect	Internally unused; must remain unconnected and unbonded on PCB

Key Features

Feature	Design Value
Rail-to-rail output stage	Delivers full dynamic range into 8 Ω without headroom loss-maximizes loudness from low-voltage rails
Ultra-low standby current	10 nA typical ensures >1 year battery retention in always-listening voice UI subsystems
Integrated thermal shutdown	150 °C automatic cutoff prevents latch-up or permanent damage during sustained high-power operation
Unity-gain stable architecture	Operates reliably without external compensation components-even with 500 pF capacitive loads
High PSRR (75 dB @ 217 Hz)	Rejects ripple from switching regulators, eliminating need for LDO pre-regulation in cost-sensitive designs

Applications

Mobile Handset Audio

Laptop Speaker Amplification

Use Scenario: Driving mono speaker in slim smartphone chassis with Li-ion battery supply.

IC Role / Device Role / Timing Role: Single-ended audio power amplifier delivering 1 W peak into 8 Ω load with minimal external components.

Use Value: Eliminates need for external charge pump or boost converter-reduces BOM count and PCB area by 30% versus legacy 3 V amplifiers.

Use Scenario: Boosting audio output from codec DAC in ultrabook with 3.3 V system rail.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR buffer amplifier enabling clean speaker drive without audible switching artifacts.

Use Value: 75 dB PSRR suppresses 217 Hz ripple from CPU VRMs-prevents audible buzz during video playback or heavy compute loads.

PDA Media Playback

Portable Bluetooth Speaker

Use Scenario: Battery-powered PDA with stereo audio playback and limited board space.

IC Role / Device Role / Timing Role: Rail-to-rail output stage delivering 450 mW into 8 Ω @ 3.3 V with <0.15% THD+N.

Use Value: Maintains high SNR (>90 dB) across full voltage range-enables consistent audio quality as battery discharges from 4.2 V to 3.0 V.

Use Scenario: Compact Bluetooth speaker using single-cell Li-ion (2.6–4.2 V) and 4 Ω speaker.

IC Role / Device Role / Timing Role: Efficient Class-AB amplifier supporting 260 mW @ 2.6 V and thermal foldback protection.

Use Value: 10 nA standby current extends shelf life; thermal shutdown prevents overheating during extended outdoor use.

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio power amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPA2012D2RTJR	2-channel, 2.1 W/channel into 4 Ω @ 5 V; higher quiescent current (2.8 mA vs 8 mA); no standby mode	Requires dual-channel layout; lacks ultra-low-power shutdown-unsuitable for battery-critical wearables	Select when stereo output and higher output power are required; avoid where standby current <100 nA is mandatory
MAX9718ETA+	1 W into 8 Ω @ 5 V; 1.2 mA quiescent current; 1 µA shutdown current (vs 10 nA); no thermal shutdown	Higher shutdown current reduces battery lifetime in always-on voice wake-up; lacks integrated thermal protection	Prefer for cost-sensitive consumer audio where thermal risk is mitigated externally; not recommended for sealed enclosures

Compared with TPA2012D2RTJR and MAX9718ETA+, TS4871ID uniquely combines 10 nA standby, integrated thermal shutdown, and rail-to-rail output in MiniSO-8-making it optimal for space- and power-constrained portable audio where reliability and battery longevity are critical.

Availability

TS4871ID is available at Aetrix Electronics and suitable for mobile handset audio, laptop speaker amplification, PDA media playback, and portable Bluetooth speaker designs requiring stable component supply and long-term lifecycle support.

Supply support for TS4871ID includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TS4871ID belongs to ST's low-voltage audio amplifier product line, engineered specifically for high-efficiency, low-standby-power audio output in battery-operated portable electronics with strict size and thermal constraints.

FAQ

What is the minimum supply voltage for reliable operation of TS4871ID?

The TS4871ID operates down to 2.5 V per absolute maximum ratings and electrical characteristics tables. At 2.6 V, it delivers 260 mW into 8 Ω with THD ≤ 1%, maintaining full functionality including standby mode activation and thermal protection-verified across −40 °C to +85 °C ambient range.

Can TS4871ID drive a 4 Ω speaker load?

Yes-TS4871ID supports 4–32 Ω loads per operating conditions table. At 5 V, it delivers 1.4 W into 4 Ω (THD = 1%, f = 1 kHz), with thermal derating curves confirming safe operation up to 1.2 W continuous at 25 °C ambient when using proper PCB copper pour on the exposed pad.

How does the BYP pin function, and what capacitor value is required?

The BYP pin connects to a 1 µF capacitor (Cb) that forms an internal virtual ground, enabling true rail-to-rail output with single-supply operation. Datasheet Figure 1 and Table 6 specify Cb = 1 µF (±20%) ceramic; reducing Cb to 0.1 µF degrades PSRR above 1 kHz but is permissible if high-frequency noise immunity is not critical.

Is external gain-setting resistor network mandatory for TS4871ID?

No-TS4871ID is unity-gain stable and functions as a voltage follower with IN+ tied to signal and IN− tied to VOUT. External resistors (R_in, R_feed) are only required to set closed-loop gain >1; the device remains stable without them, simplifying designs needing fixed-gain or buffer configurations.

TS4871ID Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Type:: Class AB

Output Type:: 1-Channel (Mono)

Max Output Power x Channels @ Load:: 1W x 1 @ 8Ohm

Voltage - Supply:: 2.5V ~ 5.5V

Features:: Depop, Standby, Thermal Protection

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

TS4871ID FAQ

1.How can I place an order for TS4871ID through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4871ID on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS4871ID reliable?

The price and inventory of TS4871ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4871ID is usually 5 days.

3.What payment methods are accepted for TS4871ID?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4871ID transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4871ID?

TS4871ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4871ID order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS4871ID?

For technical support, including TS4871ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4871ID requirements.

6.How does Aetrix verify that TS4871ID is sourced from the original manufacturer or authorized distributors?

All TS4871ID products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS4871ID meets industry standards.

7.What is the process for return or replacement of TS4871ID?

All TS4871ID units undergo pre-shipment inspection (PSI). If there is an issue with TS4871ID, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS4871ID part is unused and in its original packaging.

Return procedure for TS4871ID:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…