TDF8554J数据手册恩XP中文资料规格书

描述 Description

The TDF8554J is one of a new generation of complementary quad Bridge-Tied Load(BTL) audio power amplifiers with full I2C-bus controlled diagnostics, multiple voltageregulator and two power switches intended for automotive applications.
The TDF8554J can operate at a battery voltage as low as 6 V making this amplifiersuitable for stop/start-car operation. The amplifier uses a complementary DMOS outputstage in a Silicon-On-Insulator (SOI)-based BCD process. The DMOS output stageensures a high power output signal with perfect sound quality. The SOI-based BCDprocess ensures a robust amplifier, where latch-up cannot occur, with good separationbetween the four independent channels with every component isolated and withoutsubstrate currents.
The multiple voltage regulator comprises four programmable voltage regulators, onestandby regulator and two power switches.
The TDF8554J is soft- and hardware downwards-compatible with its predecessorTDA8589AJ.
The TDF8554J includes features, such as selectable undervoltage for stop/start-carswhich can be selected with additional I2C-bus instruction bytes. If these additional bytesare not sent, the TDF8554J has the same functionality as its predecessor IPASTDA8589AJ.

特性 Features

Amplifier Stop/start-car prepared: keeps operating without audible disturbance during engine start at a battery voltage as low as 6 V
I²C-bus mode (3.3 V and 5 V compliant)
Can drive 2 Ω or 4 Ω 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
Programmable gain (26 dB and 16 dB), independently programmable for the front and rear channels
Line driver mode (16 dB and mid-tap voltage 0.25VP for stop/start-cars)
Programmable clip detection: 2 %, 5 % or 10 %
Programmable thermal pre-warning
If the temperature protection of the regulator is activated, the amplifier is muted before the regulator is switched off
Loss of ground and open VP safe (with 150 mΩ series impedance and a maximum supply decoupling capacitor of 2200 μF)
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 VP = 50 V) and overvoltage pre-warning at 16 V
Offset detection
Multiple regulator Good stability for any regulator with almost any output capacitor
Five voltage regulators (microcontroller, display, audio processor, mechanical digital and mechanical drive)
I²C-bus controlled
Selectable output voltages for regulators 1, 4 and 5
Low dropout voltage PNP output stages
High supply voltage ripple rejection
Low noise for all regulators
Two power switches (antenna switch and amplifier switch)
Standby regulator (microcontroller supply) operational during load dump and thermal shut-down
Low standby quiescent current (only regulator 2 operational)
Backup functionality for regulator 2
Protection If connection to the battery voltage is reversed, all regulator voltages will be zero
Able to withstand output voltages up to 18 V if supply line is short-circuited
Thermal protection to avoid thermal breakdown
Load-dump protection
Regulator outputs protected from DC short-circuit to ground or to supply voltage
All regulators protected by foldback current limiting
Power switches protected from loss-of-ground