TDF8541J/N3,112

TDF8541J/N3,112 is one of a new generation of complementary quad Bridge-Tied Load (BTL) audio power amplifier 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 advanced 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: operating w/o audible disturbance during engine start at 6V battery voltage
• 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 2ohm and 4ohm loads, speaker fault detection
• Start-up diagnostics with load detection: open, short, present, filtered for door-slam
• AC load detection with low and high current mode, gain select after start-up w/o audible disturbance
• Independent selectable soft mute of front and rear channels
• Programmable gain (26 dB and 16 dB), independently programmable for the front and rear channels
• Line driver mode supports engine start at battery voltage as 6V (16dB and mid-tap voltage 0.25 x VP)
• Programmable clip detect: 2 %, 5 % or 10 %, programmable thermal pre-warning