TDF8541TH/N3,118

The TDF8541 is one of a new generation of complementary quad Bridge-Tied Load (BTL) audio power amplifiers intended for automotive applications. It has full I²C-bus controlled diagnostics, including start-up diagnostics. The TDF8541 can operate at a battery voltage as low as 6 V making this amplifier suitable for stop/start-car operation. The amplifier uses a complementary DMOS output stage in a Silicon-On-Insulator (SOI)- based BCD process. The DMOS output stage ensures a high- power output signal with perfect sound quality. The SOI-based BCD process ensures a robust amplifier, where latch-up cannot occur, with good separation between the four independent channels, with every component isolated and without substrate currents.

• Stop/start-car prepared: keeps operating without audible disturbance during enginestart at a battery voltage as low as 6 V
• Operates in either legacy (non I²C-bus) or I²C-bus modes (3.3 V and 5 V compliant)
• Four hardware-programmable I²C-bus addresses
• Can drive 2 O and 4 O loads
• Speaker fault detection
• Start-up diagnostics with load detection: open, short, present; filtered for door-slamand chatter relays
• AC load (tweeter) detection with low and high current mode
• Gain select after start-up without audible disturbance
• Independent selectable soft mute of front and rear channels
• Programmable gain (26 dB and 16 dB), independently programmable for the front andrear channels
• Line driver mode supports engine start at a battery voltage as low as 6 V (16 dB andmid-tap voltage 0.25 x V_P)
• Programmable clip detect: 2 %, 5 % or 10 %
• Programmable thermal pre-warning
• Pin STB