TDA8569Q Integrated Circuit

The TDA8569Q is a class-B 4-channel BTL (Bridge-Tied Load) audio power amplifier, originally manufactured by Philips/NXP, commonly used in car audio applications (car radios).

Here are the main technical specifications:

• Channel Configuration: 4 channels (can also be configured as 2 channels in bridged stereo mode).
• Output Power (at 14.4V, 4 ohms, THD 10%):
  • 4 x 25 W (typically in SE/quad mode) or approx. 4 x 40 W max.
  • In bridge configuration (BTL): higher power per channel.
• Minimum load impedance: 2 ohms (compatible with low-impedance loudspeakers).
• Supply voltage:
  • Operating: from 6V to 18V (typical 14.4V).
  • Protection against peak voltages up to 45V.
• Total Harmonic Distortion (THD): 0.05% typical (at 1W, 4 ohms).
• Signal-to-Noise Ratio (SNR): Optimised for automotive applications.
• Voltage gain: 26 dB (fixed).
• Integrated protections:
  • Short-circuit protection on outputs (to ground, to supply and between channels).
  • Thermal protection (Thermal Shutdown).
  • Battery polarity reversal protection.
  • Switching voltage transient protection circuit (mute/stand-by without "plop").
• Package / Encapsulation: SIL17P (Single In-Line 17 pin, plastic).

For detailed circuit diagrams and performance graphs, please refer to the official NXP/Philips datasheet for the TDA8569Q.