The TDA8950 is a high-efficiency Class D audio power amplifier. The typical output power
is 2 × 150 W with a speaker load impedance of 4 Ω.
The TDA8950 is available in both HSOP24 and DBS23P power packages. The amplifier
operates over a wide supply voltage range from ±12.5 V to ±40 V and features low
quiescent current consumption. The TDA8950 is a two-channel audio power amplifier that uses Class D technology.
For each channel, the audio input signal is converted into a digital PWM signal using an
analog input stage and a PWM modulator. To drive the output power
transistors, the digital PWM signal is fed to a control and handshake block and to highand
low-side driver circuits. This level-shifts the low-power digital PWM signal from a logic
level to a high-power PWM signal switching between the main supply lines.
A 2nd-order low-pass filter converts the PWM signal to an analog audio signal that can be
used to drive a loudspeaker.
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