TFA9842BJ Philips Semiconductors, TFA9842BJ Datasheet

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TFA9842BJ

Manufacturer Part Number
TFA9842BJ
Description
2-channel Audio Amplifier (SE: 1 W to 7.5 W)
Manufacturer
Philips Semiconductors
Datasheet

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TFA9842BJ
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1. General description
2. Features
3. Applications
The TFA9842BJ contains two identical audio power amplifiers. The TFA9842BJ can be
used as two Single-Ended (SE) channels with a fixed gain of 26 dB.
The TFA9842BJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9842BJ
is pin compatible with the TFA9841J, TFA9842J, TFA9843J and the TFA9843BJ.
The TFA9842BJ 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.
TFA9842BJ
2-channel audio amplifier (SE: 1 W to 7.5 W)
Rev. 01 — 1 March 2004
1 W to 7.5 W operation possibility
Soft clipping
Standby and mute mode
No on or 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 TFA9841J, TFA9842J, TFA9843J and the TFA9843BJ.
Televisions
Monitors
PC speakers
Boom boxes
Mini and micro audio receivers.
Preliminary data sheet
www.DataSheet4U.com

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TFA9842BJ Summary of contents

Page 1

... The TFA9842BJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9842BJ is pin compatible with the TFA9841J, TFA9842J, TFA9843J and the TFA9843BJ. The TFA9842BJ 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 ...

Page 2

... Ordering information Package Name Description DBS9P plastic DIL-bent-SIL power package; 9 leads (lead length 12/11 mm); exposed die pad Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 SE) Min Typ Max Unit ...

Page 3

... OUT2 2 CIV 3 IN1 4 TFA9842BJ GND 5 SVR 6 MODE 7 OUT1 Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifi OUT1 2 OUT2 SHORT-CIRCUIT AND TEMPERATURE PROTECTION SVR 001aaa443 001aaa444 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. SE) ...

Page 4

... Figure 8. The maximum output power is limited by the supply voltage of is required for V > see CC Rev. 01 — 1 March 2004 TFA9842BJ 2-channel auto amplifier (2 Figure 5. The output power is © Koninklijke Philips Electronics N.V. 2004. All rights reserved ...

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 TFA9842BJ has three functional modes, which can be selected by applying the proper DC voltage to pin MODE (see Table 5: V MODE 0 ...

Page 6

... After this time period the power stages switch on automatically and the detection will take place again; still a too high temperature switches off the power stages immediately. This protects the TFA9842BJ against shorts to ground, to the supply voltage, across the load and also to high chip temperatures. ...

Page 7

... kHz ripple output voltage in mute mode channel source separation channel unbalance = 0 source Rev. 01 — 1 March 2004 TFA9842BJ 2-channel auto amplifi measured in test circuit CC i Min Typ Max [ [2] - ...

Page 8

... THD N (%) (W) V Fig 7. Total harmonic distortion-plus-noise as function of frequency. Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifi the input and with a frequency source 001aaa445 001aaa446 ...

Page 9

... bandpass filter kHz has been applied; inputs short-circuited. Fig 11. Supply voltage ripple rejection as function of frequency. Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 001aaa422 ( 001aaa424 ...

Page 10

... CIV 3 V REF STANDBY 7 MODE MUTE 0.5V SVR 6 TFA9842BJ GND Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 100 nF 1000 F 8 OUT1 470 OUT2 470 SHORT-CIRCUIT AND TEMPERATURE PROTECTION 001aaa448 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

Page 11

... TVA 100 nF 220 220 nF nF CIV 22 SGND F CIV IN2 IN1 = 60 C (example Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifi 1000 F 150 F MODE MUTE 001aaa426 , is 2.0 K/W. th(j-c) © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

Page 12

... 100 loads external heatsink of 10 K/W; music signals. amb Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 Section 8.2.2). This allows for 001aaa449 (V) CC © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

Page 13

... 12.4 11.4 6.7 3.5 2.54 1.27 5.08 2 11.0 10.0 5.5 REFERENCES JEDEC JEITA Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifi view B: mounting base side ...

Page 14

... Preliminary data sheet Suitability of through-hole mount IC packages for dipping and wave soldering methods Soldering method Dipping suitable Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifi the stg(max) Wave [1] suitable not suitable © Koninklijke Philips Electronics N.V. 2004. All rights reserved. ...

Page 15

... TFA9842BJ 20040301 9397 750 12847 Preliminary data sheet Data sheet status Change notice Preliminary data Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 Order number Supersedes 9397 750 12847 © Koninklijke Philips Electronics N.V. 2004. All rights reserved SE) ...

Page 16

... Furthermore Philips customers are drawn to safety standards (IEC 950 950, CENELEC, ISO, etc.) and other (legal) requirements applying for such high voltages. Rev. 01 — 1 March 2004 www.DataSheet4U.com TFA9842BJ 2-channel auto amplifier (2 SE) © Koninklijke Philips Electronics N.V. 2004. All rights reserved ...

Page 17

... Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 20 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 21 Contact information . . . . . . . . . . . . . . . . . . . . 16 TFA9842BJ 2-channel auto amplifier (2 © Koninklijke Philips Electronics N.V. 2004 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice ...

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