TDF8541J

I²C-bus controlled 4 x 45 W power amplifier


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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.

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 Ω and 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
  • 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 0.25 VP)
  • 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
  • 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) with overvoltage pre-warning at 16 V
  • Offset detection
All information on this product information page is subject to the subsequent disclaimers:
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Parametric search

Parametrics of this product

Type numberPackagePackage nameProduct statusChannel configurationRMS power(W)RemarksGain(dB)
TDF8541JSOT827-1
(DBS27P)		DBS27PProductionBTL/quad4 x 25I2C Bus diagnostic26

Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
TDF8541J/N2TDF8541J/N2,1129352 919 19112Volume productionSOT827-1
(DBS27P) 		TubeStandard Marking
TDF8541J/N3TDF8541J/N3,1129352 977 39112Volume productionSOT827-1
(DBS27P) 		TubeStandard Marking

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT827-1DBS27Pplastic DIL-bent-SIL (special bent) power package; 27 leads (lead length 6.8 mm)2013-02-13

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
TDF8541J/N2TDF8541J/N2,112TDF8541J/N2NANA
TDF8541J/N3TDF8541J/N3,112TDF8541J/N3NANA
Quality and reliability disclaimer

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Documentation for this product

File nameTitleTypeFormatDate
75017062Continous sound experience for stop/start carsLeafletpdf2011-09-27
75017414Seamless sound experience for stop and start carsLeafletpdf2013-05-01

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
TDF8541J/N29352 919 19112TDF8541J/N2,112NADIGI-KEY CORPORATION4395/21/2013Buy online 
   NAFUTURE ELECTRONICS205/20/2013Buy online 
   EUFUTURE ELECTRONICS UK205/20/2013Buy online 
   ASIAFUTURE ELECTRONICS- ASIA205/20/2013Buy online 
TDF8541J/N39352 977 39112TDF8541J/N3,112       

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