TDA8569Q/N1S,112

Overview

The TDA8569Q is an integrated Class-B quad car radio power amplifier in a 23-lead DBS23P package. It delivers 4 × 40 W into 2 Ω loads at 14.4 V with 26 dB fixed gain. Operating voltage ranges from 6 V to 18 V, with standby current under 10 μA. Features include BTL configuration, diagnostic output for distortion and short-circuit detection, thermal protection, and mode select switch functionality.

Feature Summary

• Four amplifiers in Bridge-Tied Load (BTL) configuration
• Diagnostic facility for distortion, short-circuit, and temperature pre-warning
• Mode select switch for operating, mute, and standby states
• Protection against load dump, reverse polarity, and electrostatic discharge

Applications

• Car radio applications
• Quad channel audio systems

Procurement Notes

Verify the exact part number suffix as datasheets may list variations like TDA8569Q/N1 or TDA8569QU. Confirm RoHS compliance status and check for obsolescence notices, as older Philips/NXP automotive components often have limited availability. Ensure the DBS23P package matches your PCB footprint requirements before ordering.

Selection Notes

Select this component for high-power four-channel automotive audio designs requiring robust protection features. The fixed 26 dB gain simplifies circuit design by reducing external component count. Consider the thermal resistance of 40 K/W in free air when designing heat dissipation strategies for enclosed vehicle environments.

Part Context

Part of the TDA856x series of integrated class-B output amplifiers. Pin-compatible with the TDA8567Q. Designed specifically for automotive environments with wide supply voltage tolerance and comprehensive fault diagnostics via the VDIAG pin.

Replacement Considerations

TDA8567Q is explicitly noted as pin-compatible in the datasheet. Verify electrical specifications match application needs when substituting.

FAQ

How does the diagnostic pin indicate different fault conditions?

The VDIAG pin goes LOW during dynamic distortion clipping, continuous short-circuits to ground/supply, or when junction temperature reaches 145 °C. For cross-load shorts, it pulses LOW for 10 ms and HIGH for 50 μs.

What is the recommended procedure to avoid switch-on plops?

Keep the amplifier in mute mode for at least 150 ms during power-up to allow input capacitors at pins IN1-4 to charge fully before switching to operating mode.