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TDA8948J_1

Product data sheet

Rev. 01 — 27 February 2008

24 of 26

NXP Semiconductors

TDA8948J

4-channel audio amplifier

17. Revision history

Table 14.

Revision history

Document ID

Release date

Data sheet status

Change notice

Supersedes

TDA8948J_1

20080227

Product data sheet

Содержание TDA8948J

Страница 1: ...put 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...

Страница 2: ...therwise specified BTL VCC 17 V Tamb 25 C RL 8 f 1 kHz VMODE1 VCC VMODE2 VCC measured in test circuit Figure 11 unless otherwise specified Symbol Parameter Conditions Min Typ Max Unit VCC supply volta...

Страница 3: ...ple and an amplitude of 300 mV RMS which is applied to the positive supply rail 5 Ordering information 6 Block diagram Table 2 Ordering information Type number Package Name Description Version TDA8948...

Страница 4: ...tion Symbol Pin Description OUT1 1 non inverted loudspeaker output of channel 1 GND1 2 ground of channels 1 and 2 VCC1 3 supply voltage channels 1 and 2 OUT2 4 inverted loudspeaker output of channel 2...

Страница 5: ...equency response and good switch on behavior 8 2 Power amplifier The power amplifier is a BTL and or SE amplifier with an all NPN output stage capable of delivering a peak output current of 4 A Using...

Страница 6: ...VCC 17 V RL 8 and THD 0 1 5 The power dissipation can be derived from Figure 8 SE and BTL for a headroom of 0 dB and 12 dB respectively For heat sink calculation at the average listening level a powe...

Страница 7: ...Rejection SVRR is measured with an electrolytic capacitor of 150 F on pin SVR using a bandwidth of 20 Hz to 22 kHz Figure 10 illustrates the SVRR as function of the frequency A larger capacitor value...

Страница 8: ...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 exce...

Страница 9: ...fied Symbol Parameter Conditions Min Typ Max Unit Supply VCC supply voltage operating 1 9 17 26 V no clipping signal 2 28 V Iq quiescent current VCC 17 V RL 3 100 145 mA Istb standby current 10 A Outp...

Страница 10: ...y fripple and an amplitude of 300 mV RMS which is applied to the positive supply rail 3 Output voltage in mute mode is measured with VMODE1 VMODE2 7 V and Vi 1 V RMS in a bandwidth from 20 Hz to 22 kH...

Страница 11: ...105 104 103 102 10 1 coc005 fi 1 kHz 1 1 SE at THD 10 2 2 SE at THD 10 3 3 SE at THD 10 4 4 SE at THD 10 5 8 SE at THD 10 fi 1 kHz 1 16 BTL at THD 10 2 8 BTL at THD 10 3 6 BTL at THD 10 4 4 BTL at TH...

Страница 12: ...TL Fig 6 Total harmonic distortion plus noise as a function of output power 102 10 1 10 1 10 2 mce488 10 1 102 1 10 Po W THD N 102 10 1 10 1 10 2 mce487 10 1 1 THD N 10 Po W 102 VCC 17 V Po 1 W RL 4 V...

Страница 13: ...on as a function of channel output power per channel worst case all channels driven 010aaa430 0 20 Po W 20 0 4 8 12 16 4 Ptot W 8 12 16 Po W 0 20 16 8 12 4 010aaa432 8 12 4 16 20 Ptot W 0 VCC 17 V RL...

Страница 14: ...V RMS A band pass filter of 20 Hz to 22 kHz has been applied Inputs short circuited VCC 17 V RSOURCE 0 Vripple 300 mV RMS A band pass filter of 20 Hz to 22 kHz has been applied Inputs short circuited...

Страница 15: ...F 100 nF 470 nF IN3 IN4 OUT3 OUT4 Vi Vi Vi VCC VCC RL8 22 F 2 2 F 10 k 50 k 270 BC547 BC547 7 5 V micro controller 2 15 GND1 GND2 60 k 60 k 3 8 6 60 k 60 k 9 12 14 17 TDA8948J MUTE 3 4 ON 3 4 010aaa05...

Страница 16: ...mended to use Schottky diodes to the supply voltage and ground Fig 12 Application diagram with one pin control and reduction of capacitor VCC1 VCC2 16 220 nF IN1 IN2 OUT1 OUT2 220 nF RL4 RL4 470 F 1 4...

Страница 17: ...e rejection 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 hi...

Страница 18: ...the maximum temperature increase divided by the power dissipation Rth tot Tj max Tamb max P At VCC 17 V and RL 4 4 SE the measured worst case sine wave dissipation is 17 W see Figure 8 For Tj max 150...

Страница 19: ...applicable Tamb 25 C external heat sink of 4 3 K W 1 RL 1 2 RL 2 3 RL 3 4 RL 4 5 RL 8 Tamb 25 C external heat sink of 4 3 K W 1 RL 2 2 RL 4 3 RL 6 4 RL 8 5 RL 16 a 4 times various SE loads with music...

Страница 20: ...ions Note 1 Plastic or metal protrusions of 0 25 mm maximum per side are not included SOT243 1 0 5 10 mm scale D L E A c A2 L3 Q w M bp 1 d D Z e e x h 1 17 j Eh non concave 99 12 17 03 03 12 DBS17P p...

Страница 21: ...older The wave soldering process is suitable for the following Through hole components Leaded or leadless SMDs which are glued to the surface of the printed circuit board Not all SMDs can be wave sold...

Страница 22: ...It is imperative that the peak temperature is high enough for the solder to make reliable solder joints a solder paste characteristic In addition the peak temperature must be low enough that the packa...

Страница 23: ...rther information on temperature profiles refer to Application Note AN10365 Surface mount reflow soldering description MSL Moisture Sensitivity Level Fig 16 Temperature profiles for large and small co...

Страница 24: ...data sheet Rev 01 27 February 2008 24 of 26 NXP Semiconductors TDA8948J 4 channel audio amplifier 17 Revision history Table 14 Revision history Document ID Release date Data sheet status Change notic...

Страница 25: ...to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or appli...

Страница 26: ...figuration 5 8 2 Power amplifier 5 8 2 1 Output power measurement 6 8 2 2 Headroom 6 8 3 Mode selection 6 8 4 Supply voltage ripple rejection 7 8 5 Built in protection circuits 8 9 Limiting values 8 1...

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