TFA9843AJ Datasheet, PDF(1/19 Page) NXP Semiconductors – 20 W stereo power amplifier with volume control

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TFA9843AJ Datasheet, PDF (1/19 Pages) NXP Semiconductors – 20 W stereo power amplifier with volume control

TFA9843AJ

20 W stereo power ampliï¬er with volume control

Rev. 01 â 28 April 2006

Preliminary data sheet

1. General description

The TFA9843AJ contains two identical audio power ampliï¬ers. 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.

2. Features

I 2 channel SE: 1 W to 20 W operation possibility

I Soft clipping

I Input clamps

I Volume control

I Standby and Mute mode

I No on or off switching plops

I Low standby current

I High supply voltage ripple rejection

I Outputs short-circuit protected to ground, supply and across the load

I Thermally protected

I Pin compatible with the TFA9842AJ, TFA9843(B)J, TFA9842(B)J, TFA9841J

3. Applications

I CRT TV and LCD TV

I Monitors

I PC speakers

I Boom box

I Mini and micro audio receivers

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