NXP quad Class-AB
amplifiers TDF854x
for automotive
Seamless sound experience for
start-stop cars
Designed for use in stop-start cars, these advanced Class-AB amplifiers support listening
to audio streams while the car’s internal power supply is down for engine start. They
operate in the range of 6 to 18 V.
KEY FEATURES
`` Keeps operating without audible disturbance during engine
start at a battery voltage as low as 6 V
`` Low Vp mute level adjustable via I2C (6 V, 8 V)
`` Optimized for low pop (guaranteed in test program)
`` Full (start-up) diagnostics with flexible read-out
`` Programmable DIAG pin
`` Second clip-detect pin for additional front/rear detection
(mid-tone/bass)
`` Pin-to-pin compatible family approach with scalable output
power and Best Efficiency Mode
`` Compatible with Best Efficiency quad amplifier (25 W)
`` Best Efficiency Mode with patented low switching distortion
`` Best Efficiency Mode (uses information from 4 channels) with
17% less dissipation for uncorrelated signals compared to
2-channel high efficiency mode
APPLICATION
`` Automotive Head Unit
`` Automotive Hybrid Sound System
The TDF854x family reflects NXP’s ongoing commitment
to improving functionality and performance in automotive
infotainment systems. Available in configurations with I2C-bus
control or a Best Efficiency mode, they operate over a wide
voltage range and reduce dissipation.
I2C-BUS CONTROL
TDF854x family is quad Class-AB amplifiers with I2C-bus
control. The TDF8541 and TDF8544 use an Asymmetrical or
‘single ended’ input configuration, delivers an output power
of 25 W or 28 W, and are available in several bend variants of
DBS27 or HSOP36 package.
All amplifier qualified in accordance with the Automotive
Electronics Council (AEC) standard Q100.
All devices offer the following features:
`` Load dump/over voltage protection
`` All amplifier outputs short circuit proof to ground, supply
voltage and across the load, independent per channel
`` All pins short circuit proof to ground
`` Thermal protection to avoid thermal breakdown
`` Internally fixed gain of 16 dB or 26 dB
`` No hearable plops when switching:
- Switch on/switch off
- Standby and mute
- Mute and operating
`` Single mode control pin (standby, operating: mute/on)
`` Low standby current
`` Low power dissipation in any short-circuit condition
`` Outputs are short-circuit proof to ground
`` Low Vp mute for fast mute Vp drops
`` Line driver mode (16 dB gain in BTL mode)
`` Low gain mode for booster mode during engine start
condition
`` Indication of a short circuit at an amplifier output, short to
battery and ground
`` DC-load detection: open, short, and present (woofer)
`` AC-load detection: for tweeters via series capacitors
`` Programmable thermal pre-warning
`` Independent short-circuit protection per channel
`` Soft thermal clipping to prevent audio holes
BEST EFFICIENCY MODE TDF8546 / TDF8546A
The TDF8546A is a redesign of the TDF8546 having a lower
quiescent current and improved electromagnetic immunity
(EMI) properties.
The TDF8546 and TDF8546A use an asymmetrical input
configuration, delivers 25 W of output power, and is available
in several bend variants of DBS27 or HSOP36 package.
The bus-controlled features are as follows:
`` Diagnostic output gives clip information at selectable and
programmable THD levels (2%, 5%, and 10%)
Output power
14.4 V; 10% THD @ 4 Ω
Input configuration
Package Name
Class-AB amplifier with
I2C control
Class-AB amplifier with
Best Efficiency mode
25 W
Asymmetrical
DBS27
TDF8541J/JS/SD
TDF8546J/JS
TDF8546AJ/SD
25 W
Asymmetrical
HSL-DBS27
TDF8541JV/SU
TDF8546JV/SU, TDF8546AJV/SU
25 W
Asymmetrical
HSOP36
TDF8541TH*
TDF8546ATH*
TDF8546TH*
28 W
Asymmetrical
DBS27
TDF8544AJ/SD
TDF8544J/SD
28 W
Asymmetrical
HSOP36
TDF8544TH*
* Input and output pins use opposite configuration.
Package letters
Name
Description
Version
J
DBS27P
Plastic DIL-bent-SIL (special bent) power package; 27 leads
SOT827-1
JV
HSL-DBS27
Heat slug less -Plastic DIL-bent-SIL (special bent) power package; 27 leads
SOT-1866-1
JS
DBSMS27P
Plastic dual bent surface mounted SIL power package; 27 leads
SOT1154-1
SD
RDBS27P
Plastic rectangular-DIL-bent-SIL (reverse bent) power package; 27 leads
SOT878-1
SU
HSL-RDBS27
Heat slug less - Plastic rectangular-DIL-bent-SIL (reverse bent) power package;
27 leads
SOT-1961-1
TH
HSOP36
Plastic heat sink small outline package; 36 leads; low standoff height
SOT851-1
www.nxp.com
© 2019 NXP Semiconductors N.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The
Date of release: April 2019
information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and
Document order number: 939775017414 REV 1
may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof
Printed in the Netherlands
does not convey nor imply any license under patent- or other industrial or intellectual property rights.
很抱歉,暂时无法提供与“TDF8546ATH/N1ZJ”相匹配的价格&库存,您可以联系我们找货
免费人工找货