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TFA9842J

NXP
Part Number TFA9842J
Manufacturer NXP
Description 2-channel audio amplifier
Published Oct 28, 2005
Detailed Description TFA9842J 2-channel audio amplifier; SE: 1 W to 7.5 W; BTL: 2 W to 15 W Rev. 01 — 26 April 2004 Preliminary data 1. Gener...
Datasheet PDF File TFA9842J PDF File

TFA9842J
TFA9842J

Overview
TFA9842J 2-channel audio amplifier; SE: 1 W to 7.
5 W; BTL: 2 W to 15 W Rev.
01 — 26 April 2004 Preliminary data 1.
General description The TFA9842J contains two identical audio power amplifiers.
The TFA9842J 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 TFA9842J comes in a 9-pin DIL-bent-SIL (DBS9P) power package.
The TFA9842J is pin compatible with the TFA9841J and TFA9843J.
The TFA9842J 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 s s s s s s s s s SE: 1 W to 7.
5 W; BTL: 2 W to 15 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 TFA9841J and TFA9843J.
3.
Applications s s s s Television PC speakers Boom box Mini and micro audio receivers.
Philips Semiconductors TFA9842J 2-channel audio amplifier (2 x SE or 1 x BTL) 4.
Quick reference data Table 1: VCC Iq Istb Po Quick reference data Conditions operating no signal quiescent supply current standby supply current output power VCC = 17 V; THD = 10 % SE; RL = 4 Ω BTL; RL = 8 Ω THD Gv SVRR total harmonic distortion voltage gain supply voltage ripple rejection SE; Po = 1 W BTL; Po = 1 W SE BTL f = 1 kHz SE BTL 60 65 dB dB 7 14 25 31 7.
5 15 0.
1 0.
05 26 32 0.
5 0.
5 27 33 W W % % dB dB VCC = 18 V; RL = ∞ Min 9 Typ 17 60 Max 26 28 100 10 Unit V V mA µA supply voltage Symbol Parameter 5.
Ordering information Table 2: Type number TFA9842J Ordering information ...


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