TDA8954TH
1. General description
The TDA8954 is a stereo or mono high-efficiency Class D audio power amplifier in a
single IC featuring low power dissipation. It is designed to deliver up to 2 × 210 W into a
4 Ω load in a stereo Single-Ended (SE) application, or 1 × 420 W into an 8 Ω load in a
mono Bridge-Tied Load (BTL) application.
It combines the benefits of Class D efficiency (≈93 % into a 4 Ω load) with audiophile
sound quality comparable to that associated with Class AB amplification.
The amplifier operates over a wide supply voltage range from ±12.5 V to ±42.5 V and
features low quiescent current consumption.
The TDA8954 is supplied with two diagnostic pins for monitoring the status of Thermal
Fold Back (TFB), Over Current Protection (OCP) and other protection circuits.
2. Features
High output power in typical applications:
SE 2 × 210 W, RL = 4 Ω (VDD = 41 V; VSS = −41 V)
SE 2 × 235 W, RL = 3 Ω (VDD = 39 V; VSS = −39 V)
SE 2 × 150 W, RL = 6 Ω (VDD = 41 V; VSS = −41 V)
BTL 1 × 420 W, RL = 8 Ω (VDD = 41 V; VSS = −41 V)
Symmetrical operating supply voltage range from ±12.5 V to ±42.5 V
Stereo full differential inputs, can be used as stereo SE or mono BTL amplifier
Low noise
Smooth pop noise-free start-up and switch off
2-pin diagnostics for protection circuits
Fixed frequency internal or external clock
High efficiency ≈93 %
Zero dead time switching
Low quiescent current
Advanced protection strategy: voltage protection and output current limiting
Thermal FoldBack (TFB) with disable functionality
Fixed gain of 30 dB in SE and 36 dB in BTL applications
Fully short-circuit proof across load
BD modulation in BTL configuration
Clock protection
