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TDF8546J

Description
Audio amplifier I2C-bus controlled 4 x 45 W best efficiency amplifier
CategoryAnalog mixed-signal IC    Consumption circuit   
File Size415KB,22 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
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TDF8546J Overview

Audio amplifier I2C-bus controlled 4 x 45 W best efficiency amplifier

TDF8546J Parametric

Parameter NameAttribute value
MakerNXP
Reach Compliance Codeunknown
ECCN codeEAR99
Commercial integrated circuit typesAUDIO AMPLIFIER
TDF8546
I
2
C-bus controlled 4
45 W best efficiency amplifier
Rev. 8 — 27 September 2013
Product short data sheet
1. General description
The TDF8546 is one of a new generation of complementary quad Bridge-Tied Load (BTL)
audio power amplifiers intended for automotive applications. It has a best efficiency mode
with full I
2
C-bus controlled diagnostics, including start-up diagnostics. The TDF8546 can
operate at a battery voltage as low as 6 V making this amplifier suitable for stop/start-car
operation.
The new best efficiency principle uses a patented switch technique which reduces
switching distortion. To reduce power dissipation, the new best efficiency principle uses
the audio information on all four channels instead of only the front or rear signals.
Dissipation is more than 65 % less than standard BTL when used for front and rear
correlated audio signals. Dissipation is 35 % less than standard BTL when used for
uncorrelated (delayed) audio signals between front and rear. It is 17 % less for
uncorrelated audio signals when the front or rear information is used.
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
New best efficiency mode with patented low switching distortion
Extreme best efficiency mode (uses information from 4 channels) with 17 % less
dissipation for uncorrelated signals compared to 2-channel best efficiency mode.
Operates in either legacy (non-I
2
C-bus) or I
2
C-bus modes (3.3 V and 5 V compliant)
Four hardware-programmable I
2
C-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

TDF8546J Related Products

TDF8546J TDF8546AJ/N1ZU TDF8546AJS/N1 TDF8546ASD/N1ZU TDF8546AJS TDF8546ATH/N1ZJ TDF8546JS/N1,512 TDF8546ATH/N1,118 TDF8546ASD/N1,112 TDF8546JS/N2,512
Description Audio amplifier I2C-bus controlled 4 x 45 W best efficiency amplifier Audio amplifier Class AB Amplifier Audio amplifier TDF8546AJS/DBSMS27P//N1/STANDARD MARKING * TUBE DR Audio amplifier Class AB Amplifier Audio amplifier Class AB Amplifier Audio amplifier Class AB Amplifier Audio amplifier TDF8546JS/DBSMS27P/TUBEDP//N1 Audio amplifier Class AB Amplifier Audio amplifier Class AB Amplifier Audio amplifier I2C-bus controlled 4 x 45 W best efficiency amplifier
Maker NXP NXP NXP NXP NXP NXP - NXP NXP -
Product Category - audio amplifier audio amplifier audio amplifier audio amplifier audio amplifier - audio amplifier audio amplifier -
series - TDF8546 TDF8546 TDF8546 TDF8546 TDF8546 - TDF8546 TDF8546 -
product - Audio Amplifiers Audio Amplifiers Audio Amplifiers Audio Amplifiers Audio Amplifiers - Audio Amplifiers Audio Amplifiers -
kind - Class-AB Class-AB Class-AB Class-AB Class-AB - Class-AB Class-AB -
Output Power - 45 W x 4 at 4 Ohms 45 W x 4 at 4 Ohms 45 W x 4 at 4 Ohms 45 W x 4 at 4 Ohms 45 W x 4 at 4 Ohms - 45 W x 4 at 4 Ohms 45 W x 4 at 4 Ohms -
Installation style - Through Hole SMD/SMT Through Hole SMD/SMT SMD/SMT - SMD/SMT Through Hole -
type - BTL BTL BTL BTL BTL - BTL BTL -
Package/box - DBS-27 DBSMS-27 SIP-27 DBSMS-27 HSOP-36 - HSOP-36 SIP-27 -
Audio - Load Impedance - 4 Ohms 4 Ohms 4 Ohms 4 Ohms 4 Ohms - 4 Ohms 4 Ohms -
THD + noise - 0.03 % 0.03 % 0.03 % 0.03 % 0.03 % - 0.03 % 0.03 % -
Supply voltage - max. - 18 V 18 V 18 V 18 V 18 V - 18 V 18 V -
Supply voltage - min. - 6 V 6 V 6 V 6 V 6 V - 6 V 6 V -
Minimum operating temperature - - 40 C - 40 C - 40 C - 40 C - 40 C - - 40 C - 40 C -40 °C
Maximum operating temperature - + 150 C + 150 C + 150 C + 150 C + 150 C - + 150 C + 150 C 105 °C
Output current - 250 mA 250 mA 250 mA 250 mA 250 mA - 250 mA 250 mA -
Gain - 26 dB 26 dB 26 dB 26 dB 26 dB - 26 dB 26 dB -
Number of channels - 4 Channel 4 Channel 4 Channel 4 Channel 4 Channel - 4 Channel 4 Channel -
closure - No Shutdown No Shutdown No Shutdown No Shutdown No Shutdown - No Shutdown No Shutdown -
Vos - 输入偏置电压 - 2 V 2 V 2 V 2 V 2 V - 2 V 2 V -
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