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TFA9843J

NXP
Part Number TFA9843J
Manufacturer NXP
Description 2-channel audio amplifier
Published Oct 28, 2005
Detailed Description TFA9843J 2-channel audio amplifier (SE: 1 W to 20 W or BTL: 4 W to 40 W) Rev. 02 — 19 January 2004 Preliminary data 1. G...
Datasheet PDF File TFA9843J PDF File

TFA9843J
TFA9843J

Overview
TFA9843J 2-channel audio amplifier (SE: 1 W to 20 W or BTL: 4 W to 40 W) Rev.
02 — 19 January 2004 Preliminary data 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 s s s s s s s s s 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.
3.
Applications s s s s Television PC speakers Boom box Mini and micro audio receivers.
Philips Semiconductors TFA9843J 2-channel audio amplifier (2 x SE or 1 x BTL) 4.
Quick reference data Table 1: Symbol VCC Iq Istb Po Quick reference data Parameter supply voltage quiescent supply current standby supply current SE output power BTL output power THD Gv SVRR total harmonic distortion voltage gain supply voltage ripple rejection THD = 10 %; RL = 4 Ω; VCC = 18 V THD = 10 %; RL = 4 Ω; VCC = 22 V THD = 10 %; RL = 8 Ω; VCC = 18 V THD = 10 %; RL = 8 Ω; VCC = 22 V SE; Po = 1 W BTL; Po = 1 W SE BTL SE; f = 1 kHz BTL; f = 1 kHz Conditions operating no signal VCC = 18 V; RL = ∞ Min 9 7 16 25 31 Typ 18 60 8.
5 14 18 29 0.
1 0.
05 26 32 60 65 Max 26 28 100 10 0.
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