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 cars internal power supply is down for engine start. They operate in the range of 6 to 18 V. KEY FEATURES The TDF854x family reflects NXPs ongoing commitment Keeps operating without audible disturbance during engine to improving functionality and performance in automotive 2 start at a battery voltage as low as 6 V infotainment systems. Available in configurations with I C-bus 2 Low V mute level adjustable via I C (6 V, 8 V) control or a Best Efficiency mode, they operate over a wide p Optimized for low pop (guaranteed in test program) voltage range and reduce dissipation. Full (start-up) diagnostics with flexible read-out 2 Programmable DIAG pin I C-BUS CONTROL 2 Second clip-detect pin for additional front/rear detection TDF854x family is quad Class-AB amplifiers with I C-bus (mid-tone/bass) control. The TDF8541 and TDF8544 use an Asymmetrical or Pin-to-pin compatible family approach with scalable output single ended input configuration, delivers an output power power and Best Efficiency Mode of 25 W or 28 W, and are available in several bend variants of Compatible with Best Efficiency quad amplifier (25 W) DBS27 or HSOP36 package. Best Efficiency Mode with patented low switching distortion Best Efficiency Mode (uses information from 4 channels) with All amplifier qualified in accordance with the Automotive 17% less dissipation for uncorrelated signals compared to Electronics Council (AEC) standard Q100. 2-channel high efficiency mode APPLICATION Automotive Head Unit Automotive Hybrid Sound SystemAll devices offer the following features: Indication of a short circuit at an amplifier output, short to Load dump/over voltage protection battery and ground A ll amplifier outputs short circuit proof to ground, supply DC-load detection: open, short, and present (woofer) voltage and across the load, independent per channel AC-load detection: for tweeters via series capacitors All pins short circuit proof to ground Programmable thermal pre-warning Thermal protection to avoid thermal breakdown Independent short-circuit protection per channel Internally fixed gain of 16 dB or 26 dB Soft thermal clipping to prevent audio holes No hearable plops when switching: - Switch on/switch off BEST EFFICIENCY MODE TDF8546 / TDF8546A - Standby and mute The TDF8546A is a redesign of the TDF8546 having a lower - Mute and operating quiescent current and improved electromagnetic immunity Single mode control pin (standby, operating: mute/on) (EMI) properties. Low standby current Low power dissipation in any short-circuit condition The TDF8546 and TDF8546A use an asymmetrical input Outputs are short-circuit proof to ground configuration, delivers 25 W of output power, and is available Low V mute for fast mute V drops in several bend variants of DBS27 or HSOP36 package. p p Line driver mode (16 dB gain in BTL mode) L ow gain mode for booster mode during engine start condition The bus-controlled features are as follows: D iagnostic output gives clip information at selectable and programmable THD levels (2%, 5%, and 10%) Output power Class-AB amplifier with Class-AB amplifier with Input configuration Package Name 2 14.4 V 10% THD 4 I C control Best Efficiency mode TDF8546J/JS 25 W Asymmetrical DBS27 TDF8541J/JS/SD TDF8546AJ/SD 25 W Asymmetrical HSL-DBS27 TDF8541JV/SU TDF8546JV/SU, TDF8546AJV/SU TDF8546ATH* 25 W Asymmetrical HSOP36 TDF8541TH* TDF8546TH* TDF8544AJ/SD 28 W Asymmetrical DBS27 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 Heat slug less - Plastic rectangular-DIL-bent-SIL (reverse bent) power package SU HSL-RDBS27 SOT-1961-1 27 leads 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.