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Philips TFA9843AJ Datasheet

20 w stereo power amplifier with volume control
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1. General description

2. Features

3. Applications

TFA9843AJ
20 W stereo power amplifier with volume control
Rev. 01 — 28 April 2006
The TFA9843AJ contains two identical audio power amplifiers. The TFA9843AJ can be
used as two Single-Ended (SE) channels with a volume control. The maximum gain is
26 dB.
The TFA9843AJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9843AJ
is pin compatible with the TFA9842AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J. The
difference between the TFA9843AJ and the TFA9843(B)J, TFA9842(B)J, TFA9841J is the
functionality of pin 7. The TFA9843AJ has a volume control on pin 7 (VC). The
TFA9843(B)J, TFA9842(B)J and TFA9841J have a mode select on pin 7 (MODE).
The TFA9843AJ contains a unique protection circuit that is solely based on multiple
temperature measurements inside the chip. This gives maximum output power for all
supply voltages and load conditions with no unnecessary audio holes. Almost any supply
voltage and load impedance combination can be made as long as thermal boundary
conditions (number of channels used, external heatsink and ambient temperature) allow
it.
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2 channel SE: 1 W to 20 W operation possibility
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Soft clipping
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Input clamps
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Volume control
I
Standby and Mute mode
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No on or off switching plops
I
Low standby current
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High supply voltage ripple rejection
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Outputs short-circuit protected to ground, supply and across the load
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Thermally protected
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Pin compatible with the TFA9842AJ, TFA9843(B)J, TFA9842(B)J, TFA9841J
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CRT TV and LCD TV
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Monitors
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PC speakers
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Boom box
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Mini and micro audio receivers
Preliminary data sheet

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  Summary of Contents for Philips TFA9843AJ

  • Page 1: General Description

    TFA9842AJ, TFA9843(B)J, TFA9842(B)J and TFA9841J. The difference between the TFA9843AJ and the TFA9843(B)J, TFA9842(B)J, TFA9841J is the functionality of pin 7. The TFA9843AJ has a volume control on pin 7 (VC). The TFA9843(B)J, TFA9842(B)J and TFA9841J have a mode select on pin 7 (MODE).
  • Page 2: Quick Reference Data

    Rev. 01 — 28 April 2006 TFA9843AJ = 0 V; measured in test circuit of = 4 ; = 4 ; < 5.0 V I(VC) © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Figure Unit at the input Version SOT523 -1 2 of 19...
  • Page 3: Block Diagram

    20 W stereo power amplifier with volume control V REF VOLUME CONTROL TFA9843AJ OUT2 TFA9843AJ OUT1 Rev. 01 — 28 April 2006 TFA9843AJ OUT1 OUT2 SHORT-CIRCUIT TEMPERATURE PROTECTION 0.5V 001aae428 001aae429 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 3 of 19...
  • Page 4: Pin Description

    This results in a good low frequency response and good switch-on behavior. The TFA9843AJ has clamps on the inputs. In Standby mode the voltage on the input pins is clamped for voltages lower than 0.1 V. When the TFA9843AJ is in Mute, Volume control or Operating mode (maximum gain) the input clamp voltage is 1 V (RMS).
  • Page 5: Headroom

    Table 4. Headroom 0 dB 12 dB 8.3 Mode selection The TFA9843AJ has four functional modes, which can be selected by applying the proper DC voltage to pin VC; see Table 5. I(VC) 0 V to 0.8 V 1.2 V to 1.5 V 1.5 V to 5.0 V...
  • Page 6: Built-In Protection Circuits

    This can result in repetitive switching during too high junction temperature. This protects the TFA9843AJ against short-circuits to ground, to the supply voltage, across the load and too high chip temperatures.
  • Page 7: Static Characteristics

    = 0 V; measured in test circuit of 0.8 V < V I(VC) ; measured in test circuit of I(VC) < 5.0 V I(VC) © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Figure Unit Figure Unit 7 of 19...
  • Page 8 THD = 10 % supply voltage for various loads = 18 V; P = 1 W; R function of frequency © Koninklijke Philips Electronics N.V. 2006. All rights reserved. at the input mce485 001aaa446 f (Hz) 8 of 19...
  • Page 9 = 0 ; V = 300 mV (RMS); a ripple bandpass filter of 20 Hz to 22 kHz has been applied; inputs short-circuited. frequency © Koninklijke Philips Electronics N.V. 2006. All rights reserved. mce507 mce497 f (Hz) 9 of 19...
  • Page 10: Application Information

    10 F Rev. 01 — 28 April 2006 TFA9843AJ 100 nF OUT1 1000 F OUT2 1000 F SHORT-CIRCUIT TEMPERATURE V REF PROTECTION 0.5V 001aae430 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 1000 F 150 F 10 of 19...
  • Page 11: Volume Control Drive Options

    5.6 V 3.3 V 10 F 10 k 10 V 16 k 16 k Rev. 01 — 28 April 2006 TFA9843AJ 10 F 001aae337 001aae338 10 F 001aae339 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 11 of 19...
  • Page 12: Printed-Circuit Board

    AUDIO POWER CS NIJMEGEN TFA9843J 100 nF 1000 F SGND IN2+ IN1+ Rev. 01 — 28 April 2006 TFA9843AJ 150 F MODE +V P 10 k SB ON MUTE mce506 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 12 of 19...
  • Page 13: Thermal Behavior And Heatsink Calculation

    20 W stereo power amplifier with volume control th(j-mb) 2.0 K/W = 8.7 K/W Section 8.2.2. This allows the 2.0 K/W = 19.4 K/W © Koninklijke Philips Electronics N.V. 2006. All rights reserved. , is 2.0 K/W. 13 of 19...
  • Page 14: Test Information

    20 W stereo power amplifier with volume control (˚C) = 16 SE loads; T = 25 C; external heatsink of 10 K/W; music signals. Rev. 01 — 28 April 2006 TFA9843AJ mce504 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 14 of 19...
  • Page 15: Package Outline

    Rev. 01 — 28 April 2006 TFA9843AJ view B: mounting base side 10 mm 1.15 17.5 4.85 0.85 16.3 EUROPEAN PROJECTION © Koninklijke Philips Electronics N.V. 2006. All rights reserved. SOT523-1 1.65 0.02 1.10 ISSUE DATE 00-07-03 03-03-12 15 of 19...
  • Page 16: Soldering

    Suitability of through-hole mount IC packages for dipping and wave soldering methods Rev. 01 — 28 April 2006 TFA9843AJ stg(max) Soldering method Dipping Wave suitable suitable suitable not suitable © Koninklijke Philips Electronics N.V. 2006. All rights reserved. ). If the 16 of 19...
  • Page 17: Revision History

    TFA9843AJ_1 Preliminary data sheet 20 W stereo power amplifier with volume control Data sheet status Change notice Preliminary data sheet Rev. 01 — 28 April 2006 TFA9843AJ Supersedes © Koninklijke Philips Electronics N.V. 2006. All rights reserved. 17 of 19...
  • Page 18: Contact Information

    For detailed and full information see the relevant full data sheet, which is available on request via the local Philips Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail.
  • Page 19: Table Of Contents

    Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © Koninklijke Philips Electronics N.V. 2006. For more information, please visit: http://www.semiconductors.philips.com. For sales office addresses, email to: sales.addresses@www.semiconductors.philips.com. TFA9843AJ All rights reserved. Date of release: 28 April 2006...