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

STMicroelectronics TS4890IQT

Name: TS4890IQT
Brand: STMicroelectronics
SKU: TS4890IQT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4890IQT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-VFDFN Exposed Pad

Datasheet:: TS4890IQT.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:2,052

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Product details

Overview

TS4890IQT from STMicroelectronics is a rail-to-rail output, 1 W mono audio power amplifier IC designed for portable battery-powered systems. It delivers 1 W RMS into 8 Ω at 5 V supply with 1% THD, features active-low standby mode (10 nA quiescent current), 75 dB PSRR at 217 Hz, and integrated pop/click suppression. It is used in mobile phone loudspeaker drivers requiring low-voltage operation and ultra-low-power shutdown.

For engineers reviewing the TS4890IQT datasheet, TS4890IQT pinout, TS4890IQT application, or TS4890IQT equivalent, key selection criteria include standby current consumption, rail-to-rail output swing capability, THD performance at low supply voltages (2.2–5.5 V), and compatibility with single-supply BTL configurations in space-constrained portable audio designs.

Technical Context

The TS4890 operates as a unity-gain stable, voltage-feedback amplifier optimized for single-supply BTL (bridge-tied load) output configuration. Its internal architecture includes a dedicated bypass pin (VBYP) for half-supply generation and an active-low STBY input enabling <10 nA shutdown current.

It integrates thermal shutdown protection and pop/click reduction circuitry to suppress turn-on/turn-off transients. Gain is externally set via resistive feedback network (R_in/R_feed), supporting closed-loop gains from 1 to 10 in standard applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1 W RMS @ 5 V, 8 Ω, 1% THD - sufficient to drive small loudspeakers without external boost stages
Supply Voltage Range	2.2 V to 5.5 V - supports Li-ion, Li-poly, and dual-AA battery systems without regulation
Standby Current	10 nA max - enables multi-week battery shelf life in always-on portable devices
THD+N	0.1% @ 250 mW, 5 V, 8 Ω - preserves audio fidelity in mid-power playback scenarios
PSRR	75 dB @ 217 Hz - rejects GSM/DC-DC switching noise in cellular handsets
Unity-Gain Stable	Yes - allows direct use with gain ≥1 without external compensation
Thermal Shutdown	Active at 150 °C - protects IC and PCB during sustained high-power output or poor heatsinking

Pinout & Package

TS4890IQT is packaged in MiniSO8 (3 mm × 3 mm, 0.65 mm pitch), a thermally enhanced, surface-mount package suitable for compact portable PCB layouts. The package provides improved thermal resistance (R_thJA = 215 °C/W) versus SO8 while maintaining pin compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (IN+)	Non-inverting input	Accepts single-ended audio signal; referenced to GND in standard SE configuration
2 (IN−)	Inverting input	Connected to feedback network (R_in/R_feed) to set closed-loop gain
3 (VBYP)	Bypass reference	Connects to 1 µF capacitor to generate stable half-supply bias for AC-coupled inputs
4 (GND)	Ground reference	Primary return path for analog and power currents; must be low-impedance plane
5 (VCC)	Positive supply	Single 2.2–5.5 V rail; requires local 1 µF ceramic decoupling adjacent to pin
6 (STBY)	Standby control	Active-low logic input; pulled low to enter 10 nA shutdown mode
7 (OUT−)	Inverted output	Drives negative side of BTL load; phase-inverted relative to OUT+
8 (OUT+)	Non-inverted output	Drives positive side of BTL load; delivers full differential swing across 8 Ω speaker

Key Features

Feature	Design Value
Rail-to-rail output swing	Enables >4.8 Vpp differential output at 5 V supply, maximizing speaker voltage swing and acoustic output
Pop/click suppression	Internal timing circuit eliminates audible transients during power-up, power-down, and standby transitions
Ultra-low standby current	10 nA shutdown reduces system leakage to negligible levels-critical for battery-backed real-time clocks or wake-on-audio functions
Thermal shutdown protection	Automatically disables output above 150 °C junction temperature, preventing permanent damage under overload or ambient overheating
External gain configuration	Supports precise gain setting (G_v = 1–10) using two external resistors-no trimming required for production calibration

Applications

Mobile Handset Loudspeaker Drive

Laptop Internal Speaker Amplification

Use Scenario: Driving 8 Ω mono loudspeaker in GSM/UMTS/LTE smartphones during voice calls and media playback.

IC Role / Device Role / Timing Role: Single-ended input → BTL output audio power stage; handles 20 Hz–20 kHz signal path with minimal external components.

Use Value: 1 W output ensures adequate SPL in handheld form factor; 10 nA standby extends standby battery life beyond 30 days.

Use Scenario: Amplifying stereo audio signals to internal speakers in ultrabooks with thin mechanical envelopes.

IC Role / Device Role / Timing Role: Mono channel per device; configured in BTL to double effective output voltage swing without dual supplies.

Use Value: Rail-to-rail output delivers >4.5 Vpp into 8 Ω at 3.3 V supply-enabling louder output than conventional Class-AB amplifiers at same voltage.

Portable Media Player Audio Output

Wireless Headset Speaker Driver

Use Scenario: Delivering clean, low-distortion audio to 8 Ω dynamic drivers in flash-based MP3 players and DAPs.

IC Role / Device Role / Timing Role: Final-stage power amplifier; interfaces directly with DAC output and speaker load-no coupling transformers or DC-blocking caps needed.

Use Value: 0.1% THD at 250 mW ensures high-fidelity playback; 2.2 V minimum supply allows operation down to near-end-of-life battery voltage.

Use Scenario: Driving miniature 8 Ω speakers in Bluetooth-enabled headsets with tight thermal and space constraints.

IC Role / Device Role / Timing Role: Low-quiescent-current mono amplifier with fast standby wake-up (<1 ms) for voice prompt playback.

Use Value: 75 dB PSRR rejects RF interference from BT radio; MiniSO8 footprint fits within 8 mm × 8 mm headset PCB area budget.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPA2012D2RTJR	Dual-channel Class-D, 1.4 W/channel @ 5 V, 8 Ω; higher efficiency but requires external LC filter	Requires board area for filter components; better suited for dual-speaker or stereo systems	Select when efficiency >85% and dual-channel operation are mandatory; not pin-compatible
MAX9718ETA+	Class AB, 1.2 W @ 5 V, 8 Ω; 120 µA quiescent current in shutdown-3 orders of magnitude higher than TS4890IQT	Unsuitable for ultra-low-power always-on monitoring; lacks integrated pop/click suppression	Choose only if legacy MAXIM design reuse is required; avoid where <100 nA standby is critical

Compared with TPA2012D2RTJR and MAX9718ETA+, TS4890IQT uniquely balances ultra-low standby current (10 nA), rail-to-rail analog output, and minimal external component count-making it optimal for cost-sensitive, battery-limited mono audio endpoints where Class-D complexity or higher shutdown leakage is unacceptable.

Availability

TS4890IQT is available at Aetrix Electronics and suitable for mobile handsets, ultrabook speaker systems, portable media players, and wireless headsets requiring stable component supply across long production lifecycles.

Supply support for TS4890IQT 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, Switzerland, specializing in automotive, industrial, and consumer ICs with strong analog and power portfolio depth.

The TS4890 belongs to ST's low-voltage audio amplifier product line, engineered specifically for space- and power-constrained portable electronics where high-fidelity audio must coexist with multi-week battery standby.

FAQ

What is the minimum supply voltage for stable operation of TS4890IQT?

The TS4890IQT operates reliably from 2.2 V to 5.5 V. At 2.2 V, it delivers 120 mW into 8 Ω at 1% THD and maintains 75 dB PSRR. Startup behavior is guaranteed down to 2.2 V, and thermal shutdown remains functional across the full range.

Can TS4890IQT drive a 4 Ω speaker load?

Yes-it can drive 4 Ω loads with derated output power: 1.4 W @ 5 V, 1% THD. However, power dissipation increases significantly; thermal design must ensure junction temperature stays below 150 °C, especially in MiniSO8 package (R_thJA = 215 °C/W).

Is external compensation required for gain settings below unity?

No-TS4890IQT is unity-gain stable and does not require external compensation for gains ≥1. For gains <1 (attenuation), stability is not guaranteed; the device is not characterized or recommended for such configurations.

How is pop/click suppression implemented in TS4890IQT?

Pop/click suppression is achieved through internal soft-start circuitry that controls bias current ramp-up/down and output stage enable timing. No external components are needed-the feature activates automatically during STBY transitions and power sequencing.

TS4890IQT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-VFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

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-DFN (3x3)

TS4890IQT FAQ

1.How can I place an order for TS4890IQT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4890IQT 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 TS4890IQT reliable?

The price and inventory of TS4890IQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4890IQT is usually 5 days.

3.What payment methods are accepted for TS4890IQT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4890IQT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4890IQT?

TS4890IQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4890IQT 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 TS4890IQT?

For technical support, including TS4890IQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4890IQT requirements.

6.How does Aetrix verify that TS4890IQT is sourced from the original manufacturer or authorized distributors?

All TS4890IQT 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 TS4890IQT meets industry standards.

7.What is the process for return or replacement of TS4890IQT?

All TS4890IQT units undergo pre-shipment inspection (PSI). If there is an issue with TS4890IQT, 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 TS4890IQT part is unused and in its original packaging.

Return procedure for TS4890IQT:

1.Submit a request within 90 days.

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

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