tfa9843j-02

Manufacturer Part Numbertfa9843j-02
DescriptionTfa9843j 2-channel Audio Amplifier Se 1 W To 20 W Or Btl 4 W To 40 W
ManufacturerNXP Semiconductors
tfa9843j-02 datasheet
 


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1. General description
The TFA9843J contains two identical audio power amplifiers. The TFA9843J can be
used as two Single-Ended (SE) channels with a fixed gain of 26 dB or one
Bridge-Tied Load (BTL) channel with a fixed gain of 32 dB.
The TFA9843J comes in a 9-pin DIL-bent-SIL (DBS7P) power package. The
TFA9843J is pin compatible with the TFA9842J and TFA9841J.
The TFA9843J 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.
2. Features
3. Applications
TFA9843J
2-channel audio amplifier (SE: 1 W to 20 W or BTL: 4 W to
40 W)
Rev. 02 — 19 January 2004
SE: 1 W to 20 W; BTL: 4 W to 40 W operation possibility
Soft clipping
Standby and mute mode
No on/off switching plops
Low standby current
High supply voltage ripple rejection
Outputs short-circuit protected to ground, supply and across the load
Thermally protected
Pin compatible with the TFA9842J and TFA9841J.
Television
PC speakers
Boom box
Mini and micro audio receivers.
Preliminary data

tfa9843j-02 Summary of contents

  • Page 1

    ... The TFA9843J comes in a 9-pin DIL-bent-SIL (DBS7P) power package. The TFA9843J is pin compatible with the TFA9842J and TFA9841J. The TFA9843J 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 ...

  • Page 2

    ... L SE BTL BTL SE kHz BTL kHz Description plastic DIL-bent-SIL power package; 9 leads (lead length 12/11 mm); exposed die pad Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) Min Typ 8.5 CC ...

  • Page 3

    ... MODE MUTE ON TFA9843J 5 GND IN2 1 OUT2 2 3 CIV IN1 4 TFA9843J GND 5 6 SVR 7 MODE OUT1 Rev. 02 — 19 January 2004 TFA9843J 8 OUT1 2 OUT2 SHORT-CIRCUIT AND TEMPERATURE PROTECTION SVR 0.5V CC MDB023 MDB024 © Koninklijke Philips Electronics N.V. 2004. All rights reserved ...

  • Page 4

    ... Power amplifier The power amplifi Bridge-Tied Load (BTL) or Single-Ended (SE) amplifier with an all-NPN output stage, capable of delivering a peak output current Using the TFA9843J as a BTL amplifier offers the following advantages: • • 9397 750 12587 ...

  • Page 5

    ... Table 4: Headroom For the average listening level a power dissipation of 4.2 W can be used for a heatsink calculation. 8.3 Mode selection The TFA9843J has three functional modes, which can be selected by applying the proper DC voltage to pin MODE (see Table 5: V MODE 0 to 0 ...

  • Page 6

    ... This protects the TFA9843J against shorts to ground, to the supply voltage, across the load and too high chip temperatures. The protection will only be activated when necessary, so even during a short-circuit condition, a certain amount of (pulsed) current will still be fl ...

  • Page 7

    ... V; measured in test circuit MODE CC i Conditions operating MODE on mode mute mode standby mode 0 < V < (V 3.5) MODE Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) Min Max 0.3 +26 0.3 +28 0 +150 40 + Value 40 2 ...

  • Page 8

    ... THD = 0 THD = kHz ripple f = 100 kHz ripple source Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) Figure 19; unless otherwise specified. Min Typ Max 0.1 0 ...

  • Page 9

    ... MCE485 (V) THD = 10 %. Fig 6. Output power (one channel) as function of Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) mce486 (V) MODE ( ...

  • Page 10

    ... Preliminary data MCE488 (W) Fig 8. Total harmonic distortion as function of output MCE489 (Hz) Fig 10. Total harmonic distortion as function of Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL THD N (%) ...

  • Page 11

    ... V CC (V) THD = 10 %; BTL; R Fig 12. Output power as function of supply voltage. MCE507 (W) V Fig 14. Total (worst case, both channels driven) power Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL ( ...

  • Page 12

    ... Fig 16. Channel separation as function of frequency MCE497 (Hz) = 300 mV (RMS); a ripple Fig 18. Supply voltage ripple rejection as function of Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL (dB 100 BTL ...

  • Page 13

    ... SHORT-CIRCUIT 3 TEMPERATURE V REF PROTECTION V CC STANDBY 7 MUTE ON TFA9843J 5 GND Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) 1000 F 100 nF 8 OUT1 1000 OUT2 1000 AND 0. SVR 150 F mce503 © ...

  • Page 14

    ... SHORT-CIRCUIT 3 TEMPERATURE V REF PROTECTION V CC STANDBY 7 MUTE ON TFA9843J 5 GND Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) 100 nF 1000 F 8 OUT1 OUT2 AND 0. SVR 150 F MDB026 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

  • Page 15

    ... L = 150 C (specification) j(max) is the total thermal resistance between the junction and the ambient including = (T T )/P th(tot) j(max) amb(max) D Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) 150 F MODE MUTE MCE506 th(j-mb) © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

  • Page 16

    ... 21.4 th(h-a) th(tot) th(j-mb) MCE504 (V) Fig 23. Junction temperature versus supply voltage. Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) = 150 C the temperature raise, caused by the 2.0 = 8.7 K/W 2.0 = 19.4 K/W 150 (˚C) 100 BTL loads ...

  • Page 17

    ... 14.7 3 12.4 11.4 3.5 2.54 1.27 5.08 14.3 2 11.0 10.0 REFERENCES JEDEC JEITA Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL view B: mounting base side ...

  • Page 18

    ... For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. For PMFP packages hot bar soldering or manual soldering is suitable. Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) Soldering method Dipping Wave suitable ...

  • Page 19

    ... Preliminary data (9397 750 12587) Modifications: • 01 20030915 - Preliminary data (9397 750 10777) 9397 750 12587 Preliminary data Minor editorial changes. Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) © Koninklijke Philips Electronics N.V. 2004. All rights reserved ...

  • Page 20

    ... Rev. 02 — 19 January 2004 TFA9843J 2-channel audio amplifi BTL) © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Fax: + 24825 ...

  • Page 21

    ... Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 19 January 2004 Document order number: 9397 750 12587 TFA9843J 2-channel audio amplifi BTL) ...