Product data sheet. Rev. 02 — 16 June 2 of Philips Semiconductors. TDAJ. 4-channel audio amplifier. 4. Quick reference data. TDAJ 4-channel audio amplifier Rev. 02 — 16 June Product data sheet 1. This gives maximum output power for all supply voltages and load conditions with no unnecessary audio holes. Applications s Television s PC speakers s Boom box s Mini and micro audio receivers Philips. The TDAJ / N2 contains four identical audio power amplifiers. The TDAJ / N2 comes in a pin Dil-Bent-Sil (DBS) power package.

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The output of channels 3 and 4 can be set to mute or on mode. Mode selection.

Figure 11 illustrates the SVRR as function of the frequency. A larger capacitor value on pin SVR improves the ripple rejection behavior at the lower frequencies.

High impedance of the outputs is the result. 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 TDAJ against shorts to ground, to the supply voltage and across the load, and against 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 flowing through the short, just as much as the power stage can handle without exceeding the critical temperature level.

The amplifier can deliver output power with non clipping output signals into nominal loads as long as the ratings of the IC are not exceeded. With a load connected at the outputs the quiescent current will increase.

The DC output voltage, with respect to ground, is approximately 0. The ripple voltage is a sine wave with a frequency fripple and an amplitude of mV RMS , which is applied to the positive supply rail. Fig 4. BTL Fig 5.

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BTL Fig 6. Total harmonic distortion-plus-noise as function of output power. BTL Fig 7. Total harmonic distortion-plus-noise as function of frequency.

PDF TDA8947J Datasheet ( Hoja de datos )

BTL Fig 8. Output power as function of supply voltage. BTL Fig 9. Total power dissipation as function of channel output power per channel worst case, all channels driven.

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BTL Fig Channel separation as function of frequency no bandpass filter applied. A bandpass filter of 20 Hz to 22 kHz has been applied.

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Inputs short-circuited. Supply voltage ripple rejection as function of frequency.

Application information Application diagram with one pin control and reduction of capacitor. Remark: Because of switching inductive loads, the output voltage can rise beyond the maximum supply voltage of 28 V. At high supply voltages, it is recommended to use Schottky diodes to the supply voltage and ground.

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The input reference grounds have to be tied with their respective source grounds and must have separate tracks from the power ground tracks; this will prevent the large output signal currents from interfering with the small AC input signals. The small-signal ground tracks should be physically located as far as possible from the power ground tracks. Supply and output tracks should be as wide as possible for delivering maximum output power.

Printed-circuit board layout single-sided ; components view.

The respective capacitor location should be as close as possible to the device and grounded to the power ground. Proper power supply decoupling also prevents oscillations.

For suppressing higher frequency transients spikes on the supply line a capacitor with low ESR, typical nF, has to be placed as close as possible to the device. For suppressing lower frequency noise and ripple signals, a large electrolytic capacitor, e.

The bypass capacitor on pin SVR reduces the noise and ripple on the mid rail voltage. In practice music signals will be applied, which decreases the maximum power dissipation to approximately half of the sine-wave power dissipation of 9 W see Section 8. Fig Junction temperature as function of supply voltage for various loads with music signals.

Test information Plastic or metal protrusions of 0.

Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specication is not implied.

Exposure to limiting values for extended periods may affect device reliability. Application information Applications that are described herein for any of these products are for illustrative purposes only.

Philips Semiconductors make no representation or warranty that such applications will be suitable for the specied use without further testing or modication. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specied.

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Trademarks Notice All referenced brands, product names, service names and trademarks are the property of their respective owners. Disclaimers Life support These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors All rights reserved.

Product data sheet Rev.Disclaimers customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Test information Application information — Applications that are described herein for any of these products are for illustrative purposes only. Data sheet status Level Data sheet status[1] Product status[2][3] Definition I Objective data Development This data sheet contains data from the objective specification for product development.

Inputs short-circuited.

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