STMicroelectronics TS4982IQT

Overview

TS4982IQT from STMicroelectronics is a 2 W stereo loudspeaker amplifier and ground-referenced 125 mW stereo headphone driver in a single 32-pin QFN package. It operates from a single 5 V supply, delivers 2 W into 4 Ω at 1% THD+N, supports four-step digital gain control and three-level 3D stereo enhancement, and integrates PC beep detection for laptop audio subsystems.

For engineers reviewing the TS4982IQT datasheet, TS4982IQT pinout, TS4982IQT application, or TS4982IQT equivalent, key selection criteria include dual-path (speaker + headphone) output capability, ±8 kV HBM ESD protection on headphone outputs, thermal shutdown at 150 °C, pop/click suppression, and independent HDEN/SPKREN standby control for power-optimized audio routing.

Technical Context

The TS4982IQT implements two independent Class-D speaker amplifiers (BTL configuration) and two Class-AB headphone amplifiers with ground-referenced outputs. Its charge pump generates a negative rail (CPVSS) from CPVCC to enable true ground-referenced headphone drive without DC-blocking capacitors.

Digital control pins (G0/G1, 3D0/3D1, HDEN, SPKREN) configure gain (9–13.5 dB), 3D effect level, and per-path enable states. The integrated PC beep detector uses a 47 kΩ input resistor and 47 nF coupling capacitor to sense 400 Hz–20 kHz, ≥0.8 Vpp signals-enabling OS-level system alert integration without external circuitry.

Key Specifications

Pinout & Package

TS4982IQT is housed in a 32-pin, 5 × 5 mm, 0.5 mm pitch QFN package with exposed thermal pad (EXPAD) for PCB-level heat dissipation. Pin numbering follows top-view layout with pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX97220AETE+T and TAS5707PAG, TS4982IQT uniquely combines ground-referenced headphone drive, integrated PC beep detection, and dual-path (speaker + headphone) Class-D/AB architecture - making it optimal for cost-sensitive, space-constrained laptop and embedded display audio systems requiring minimal external components and hardware-level alert support.

Availability

TS4982IQT is available at Aetrix Electronics and suitable for ultra-thin laptop audio subsystems, detachable tablet hubs, industrial panel PCs, and embedded medical display terminals requiring stable component supply and long-term design-in support.

Supply support for TS4982IQT 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, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The TS4982 belongs to ST's audio power amplifier product line, engineered specifically for space-constrained portable computing platforms requiring integrated speaker/headphone drive, low EMI Class-D operation, and hardware-assisted system alert functionality.

FAQ

What is the minimum recommended PCB stack-up for thermal management of TS4982IQT?

The TS4982IQT requires a 4-layer PCB with dedicated ground and power planes to achieve the specified 25 °C/W thermal resistance. The exposed thermal pad (EXPAD) must be soldered to an internal or bottom-layer copper pour connected to ≥6 thermal vias (0.3 mm diameter) to inner ground plane. Avoid placing signal traces under the IC footprint to prevent thermal isolation.

Can TS4982IQT drive 8 Ω speakers, and what is the output power at that load?

Yes - TS4982IQT delivers 1.5 W into 8 Ω at 1% THD+N with 5 V supply, as confirmed in Figure 7 of the datasheet. Output power scales inversely with load impedance; driving 8 Ω reduces peak current demand and improves thermal margin versus 4 Ω operation, though maximum power drops by ~25%.

How does the internal charge pump function, and what external components are mandatory?

The TS4982IQT integrates a 550 kHz switching charge pump generating CPVSS (negative rail) from CPVCC to enable ground-referenced headphone outputs. A 1 μF X7R ceramic flying capacitor (Cp) between CP+ and CP− is mandatory; Cps (1 μF) from CPVSS to ground completes the loop. Omitting Cp causes headphone output failure and potential latch-up.

Is TS4982IQT compatible with 3.3 V logic control inputs?

Yes - digital control pins (HDEN, SPKREN, G0, G1, 3D0, 3D1) accept VIH ≥ 2.0 V and VIL ≤ 0.8 V, making them fully compatible with 3.3 V CMOS logic. No level-shifting is required when interfacing with common microcontrollers or baseband processors operating at 3.3 V I/O voltage.