Audio Amp Speaker 4-CH Stereo 51W Class-AB 36-Pin HSOP EP T/R, TDF8544TH/N3,118, NXP

Description

The TDF8544 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 TDF8544 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 engine start 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-slam and 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 and rear channels
• Line driver mode supports engine start at a battery voltage as low as 6 V (16 dB and mid-tap voltage 0.25V_P)
• Programmable clip detect: 2 %, 5 % or 10 %
• Programmable thermal pre-warning
• Pin STB can be programmed/multiplexed with second-clip detect
• Clip information of each channel can be directed separately to pin DIAG or pin STB
• Independent enabling of thermal-, clip- or load fault information (short across the load or to V_P or to ground) on pin DIAG
• Loss-of-ground and open V_P safe (minimum series resistance required)
• All amplifier outputs short-circuit proof to ground, supply voltage and across the load (channel independent)
• All pins short-circuit proof to ground
• Temperature controlled gain reduction to prevent audio holes at high junction temperatures
• Programmable low battery voltage detection to enable 7.5 V or 6 V minimum battery voltage operation
• Overvoltage protection (load-dump safe up to V_P = 50 V) with overvoltage pre-warning at 16 V
• Offset detection