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

STMicroelectronics TS4984EIJT

Name: TS4984EIJT
Brand: STMicroelectronics
SKU: TS4984EIJT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4984EIJT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 15-UFBGA, FCBGA

Datasheet:: TS4984EIJT.pdf

Description:: IC AMP AB STEREO 1.2W 15FLIPCHIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,146

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Product details

Overview

TS4984EIJT from STMicroelectronics is a 1.2W stereo Class-AB audio power amplifier in a 15-bump flip-chip package, configured in bridge-tied load (BTL) topology for dual-channel operation. It delivers 1.2W per channel into 8Ω at 5V supply with 1% THD+N, features 10nA standby current, 62dB PSRR at 217Hz, and 106dB(A) SNR - enabling high-fidelity audio output in space-constrained portable devices.

For engineers reviewing the TS4984EIJT datasheet, TS4984EIJT pinout, TS4984EIJT application, or TS4984EIJT equivalent, key selection criteria include BTL output capability, ultra-low standby current, thermal shutdown protection, gain configurability via external resistors, and compatibility with 2.2–5.5V single-supply operation in battery-powered audio systems.

Technical Context

The TS4984EIJT integrates two independent, fully differential BTL output stages with externally adjustable closed-loop gain (AV = 2 × R_feed/R_in). Each channel supports rail-to-rail input common-mode range (1.2V to V_CC) and exhibits 65° phase margin with 15dB gain margin at unity gain, ensuring stable operation with 500pF capacitive loads.

Its active-low standby control (V_STBY ≤ 0.4V) reduces quiescent current to ≤10nA per channel, while internal thermal shutdown triggers at 150°C. The device uses a half-supply bypass (BY PASS pin) requiring a 1µF capacitor to stabilize the virtual ground node essential for BTL DC biasing.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	1.2W per channel into 8Ω @ 5V, 1% THD+N - enables loud, clean audio from compact speakers without external heatsinking
Supply Voltage Range	2.2V to 5.5V - supports direct Li-ion/Li-poly battery operation (3.0–4.2V) and regulated 3.3V/5V rails
Standby Current	10nA typical - extends battery life in always-on audio subsystems such as voice prompts or alarm tones
PSRR	62dB @ 217Hz with grounded inputs - rejects GSM/DC-DC switching noise without additional filtering
SNR	106dB(A) typical - achieves CD-quality dynamic range for consumer-grade playback
THD+N	0.2% @ 1W, 1kHz, 8Ω - preserves harmonic integrity in mid-range frequencies critical for vocal clarity
Crosstalk	107dB @ 1kHz - prevents left/right channel leakage in stereo imaging applications

Pinout & Package

TS4984EIJT uses a lead-free 15-bump flip-chip package (FC-15), thermally optimized for low R_thJA = 110°C/W on 4-layer PCBs. No external leads; interconnects are made via solder bumps on the die underside.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Positive supply input (x3 pins)	Multiple VCC bumps reduce IR drop and improve high-current delivery to both amplifiers
GND	Ground reference (x2 pins)	Dual GND bumps minimize ground bounce and enhance PSRR performance
IN1+, IN1−, IN2+, IN2−	Differential input pairs (L/R channels)	Supports fully differential input signaling to reject common-mode noise in noisy PCB environments
VOUT1+, VOUT1−, VOUT2+, VOUT2−	BTL output terminals (L/R channels)	Each pair drives one speaker terminal directly; no output coupling capacitor required
STDBY	Active-low standby enable	Pulling STDBY to GND disables both amplifiers and cuts supply current to ≤10nA
BY PASS	Half-supply virtual ground reference	Requires 1µF capacitor to GND to stabilize internal bias point for BTL DC offset control
VCC BYPASS	Supply decoupling node	Connect 100nF ceramic capacitor close to VCC bump to suppress high-frequency supply noise

Key Features

Feature	Design Value
Bridge-Tied Load (BTL) Output	Doubles effective output voltage swing vs. single-ended, delivering 4× more power into same load without doubling supply voltage
Externally Configurable Gain	Gain set by resistor ratio (AV = 2 × R_feed/R_in) - enables precise matching to source signal level and speaker sensitivity
Near-Zero Pop & Click	Internal soft-start and controlled turn-on sequence eliminates audible transients during power-up and standby exit
Thermal Shutdown Protection	Auto-shutdown at 150°C junction temperature - prevents permanent damage during sustained high-power operation or poor PCB thermal design
High PSRR & Low Noise Floor	62dB PSRR + 106dB(A) SNR - maintains signal purity in electrically noisy mobile platforms with shared power domains

Applications

Cellular Mobile Phones

Notebook & PDA Computers

Use Scenario: Driving mono or stereo earpiece/speaker in slim smartphone form factors with single-cell Li-ion battery.

IC Role / Device Role / Timing Role: Dual-channel BTL audio power amplifier providing full-range output without output coupling capacitors.

Use Value: 1.2W/channel @ 5V enables loudspeaker volume sufficient for hands-free calls and media playback under battery voltage sag.

Use Scenario: Audio subsystem for ultraportable laptops and PDAs requiring low quiescent power and minimal board area.

IC Role / Device Role / Timing Role: Stereo headphone/speaker driver with integrated standby control for OS-managed audio suspend/resume.

Use Value: 10nA standby current extends system sleep time by >30% compared to legacy 1µA-class amplifiers in always-on audio monitoring modes.

LCD Monitors & TVs

Portable Audio Devices

Use Scenario: Integrated audio amplification in thin-profile displays where heatsink space is unavailable.

IC Role / Device Role / Timing Role: Compact stereo BTL amplifier driving 8Ω mini-speakers with minimal external components.

Use Value: Flip-chip package (0.5mm pitch, <1.5mm² footprint) allows placement behind display bezel without height penalty.

Use Scenario: Battery-powered Bluetooth speakers, portable radios, and voice-enabled IoT devices.

IC Role / Device Role / Timing Role: High-efficiency stereo power stage supporting 2.2–5.5V wide-input operation across USB and battery sources.

Use Value: 62dB PSRR rejects switching noise from boost converters used in 3.7V→5V audio power rails, eliminating audible whine.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX9718ETE+T	Higher 1.4W output @ 5V/8Ω but requires 1.8V minimum supply; no BY PASS pin - uses internal charge pump for BTL bias	Less suitable for 2.2–2.6V operation; lacks half-supply bypass flexibility for custom DC bias schemes	Select when higher output power is prioritized over ultra-low-voltage operation and board-level bias control
TAS5706PAPR	Digital-input Class-D amplifier with I²S interface; 2.8W/channel @ 5V/8Ω; integrated DSP and volume control	Requires digital audio source and firmware configuration; not pin-compatible or functionally drop-in	Select when system already uses digital audio path and needs programmable EQ, limiting, or multi-band processing

Compared with MAX9718ETE+T and TAS5706PAPR, TS4984EIJT uniquely balances ultra-low standby current (10nA), 2.2V operation, and analog BTL simplicity - making it optimal for cost-sensitive, battery-limited analog audio designs where thermal headroom and layout area are constrained.

Availability

TS4984EIJT is available at Aetrix Electronics and suitable for cellular phones, notebook computers, LCD monitors, and portable audio devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TS4984EIJT 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, designing and manufacturing analog, mixed-signal, and power ICs for automotive, industrial, and consumer markets.

The TS4984 belongs to ST's high-fidelity audio power amplifier product line, engineered specifically for space-constrained portable electronics needing efficient, low-noise stereo amplification with minimal external components.

FAQ

What is the minimum recommended bypass capacitor value for the BY PASS pin?

A 1µF X5R ceramic capacitor placed between BY PASS and GND is mandatory to stabilize the internal virtual ground node. Using <1µF causes increased DC offset, pop/click artifacts, and potential instability in BTL output stage biasing - verified across all operating voltages (2.2–5.5V) and temperatures (–40°C to +85°C).

Can TS4984EIJT drive 4Ω speakers?

Yes - the datasheet specifies RL ≥ 4Ω, and electrical characteristics (e.g., Pout = 1.8W typ. @ 5V/4Ω, THD+N = 1%) confirm safe operation. However, power dissipation rises significantly; thermal derating curves require PCB copper area ≥ 200mm² and ambient ≤ 60°C for continuous 4Ω use at full output.

How does the STDBY pin behave during power-up?

STDBY must be held high (≥1.35V) during VCC ramp-up to prevent undefined output states. If STDBY floats or falls below 0.4V before VCC stabilizes, the device may enter standby prematurely, causing delayed audio startup or latch-up risk - a pull-up resistor to VCC is strongly recommended.

Is external gain-setting resistor matching required for stereo channel balance?

Yes - mismatch >0.5% between left/right Rin or Rfeed resistors introduces >0.5dB channel gain error, degrading stereo imaging. Use 0.1% tolerance thin-film resistors placed symmetrically near respective input pins to maintain <0.1dB balance across 20Hz–20kHz.

TS4984EIJT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 15-UFBGA, FCBGA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class AB

Output Type:: 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 1.2W x 2 @ 8Ohm

Voltage - Supply:: 2.2V ~ 5.5V

Features:: Depop, Differential Inputs, Standby, Thermal Protection

Mounting Type:: Surface Mount

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

Grade:: -

Qualification:: -

Supplier Device Package:: 15-FlipChip

TS4984EIJT FAQ

1.How can I place an order for TS4984EIJT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4984EIJT 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 TS4984EIJT reliable?

The price and inventory of TS4984EIJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4984EIJT is usually 5 days.

3.What payment methods are accepted for TS4984EIJT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4984EIJT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4984EIJT?

TS4984EIJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4984EIJT 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 TS4984EIJT?

For technical support, including TS4984EIJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4984EIJT requirements.

6.How does Aetrix verify that TS4984EIJT is sourced from the original manufacturer or authorized distributors?

All TS4984EIJT 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 TS4984EIJT meets industry standards.

7.What is the process for return or replacement of TS4984EIJT?

All TS4984EIJT units undergo pre-shipment inspection (PSI). If there is an issue with TS4984EIJT, 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 TS4984EIJT part is unused and in its original packaging.

Return procedure for TS4984EIJT:

1.Submit a request within 90 days.

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

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