STMicroelectronics DEMOTS4997Q

Overview

TS4997 from STMicroelectronics is a 2-channel, 1W differential-input stereo audio amplifier with programmable 3D audio enhancement, BTL output configuration, 106dB(A) SNR, and dual independent standby control (STBYL/STBYR), operating from 2.7V to 5.5V supply and delivering 1W per channel into 8Ω @ 5V with ≤0.5% THD+N - deployed in mobile handsets and portable audio systems.

For engineers reviewing the TS4997 datasheet, TS4997 pinout, TS4997 application, or TS4997 equivalent, this page delivers verified electrical specs (PSRR=80dB @ 217Hz, startup time=45ms, standby current=10nA), package-validated QFN16 4×4mm layout, real-world 3D effect programming interface (3D0/3D1), and functional alternatives for low-power stereo amplification in space-constrained designs.

Technical Context

The TS4997 implements a fully differential input architecture with internal common-mode feedback, enabling optional input coupling capacitors and high CMRR (57dB). Its BTL output stage eliminates DC-blocking capacitors at speaker terminals and supports 4–16Ω loads.

3D audio enhancement is digitally controlled via two logic-level pins (3D0/3D1), selecting among OFF/MEDIUM/LOW/HIGH modes without external programming. Each channel features dedicated STBYL/STBYR pins that reduce quiescent current to 10nA per channel when pulled low, with 46ms wake-up and 10µs shutdown timing.

Key Specifications

Pinout & Package

TS4997 is housed in a lead-free QFN16 4×4mm package with exposed thermal pad (pin 16), optimized for low thermal resistance (R_thJA = 45°C/W on 4-layer PCB) and compact portable layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TAS5706PAP and MAX97220AETE+, TS4997 uniquely combines per-channel standby, 106dB SNR, and GPIO-based 3D control in a 4×4mm QFN - making it optimal for premium mobile audio where size, noise floor, and flexible power gating are co-prioritized.

Availability

TS4997 is available at Aetrix Electronics and suitable for cellular mobile phones, notebook computers, LCD monitors, and portable audio devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TS4997 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, microcontrollers, power management, and automotive ICs with strong focus on energy efficiency and industrial reliability.

The TS4997 belongs to ST's high-performance audio amplifier product line, engineered specifically for space-constrained, battery-operated consumer electronics demanding low-noise, low-power stereo output with advanced audio features.

FAQ

What is the minimum recommended load impedance for TS4997?

The TS4997 supports load impedances from 4Ω to 16Ω. At 4Ω, maximum output power reaches ~1.3W per channel @ 5V (THD+N=1%), but thermal derating applies above 1W. For continuous operation, ST recommends ≥4Ω with adequate PCB copper area and thermal vias under the exposed pad to maintain T_J < 125°C.

How does the 3D effect enhancement work without external programming?

The 3D effect is implemented via internal signal processing circuitry controlled solely by the logic states of pins 3D0 and 3D1 (00=OFF, 01=LOW, 10=MEDIUM, 11=HIGH). No clock, serial interface, or external memory is required - the mode is latched on power-up or after standby exit, enabling plug-and-play spatial audio tuning.

Can TS4997 operate with single-ended inputs?

Yes. Though optimized for differential inputs, TS4997 supports single-ended configurations by connecting one input (e.g., LIN−) to ground or mid-rail and driving the other (LIN+) with AC-coupled signal. Gain remains set by R_IN, but CMRR degrades from 57dB to ~40dB, increasing susceptibility to supply and EMI noise.

Is the exposed pad on the QFN16 package electrically connected?

Yes - the exposed thermal pad (pin 16) is internally connected to GND. It must be soldered to a large PCB copper pour tied to the system ground plane using ≥4 thermal vias (0.3mm diameter) to achieve the specified R_thJA of 45°C/W and ensure reliable thermal performance at full output power.