TDF8541SDSLASHN2 datasheet(1/54 Pages) NXP

部件名	TDF8541SD/N2

功能描述	I 2C-bus controlled 4 x 45 W power amplifier

PDF	54 Pages

Scroll/Zoom	100%

制造商	NXP [NXP Semiconductors]

网页	http://www.nxp.com

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1 / 54 page

1.

General description

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.

2.

Features and benefits

 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

 and 4  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 0.25VP)

 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 VP or to ground) on pin DIAG

 Loss-of-ground and open VP 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

TDF8541

I2C-bus controlled 4

 45 W power amplifier

Rev. 3 — 13 December 2011

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