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LS

HS

LS

HS

OSC/RAMP

MUTE

CONTROL

BYPASS

AV

CONTROL

CONTROL

BIAS

THERMAL

SC

DETECT

SC

DETECT

AVDD

AVCC

LIN

RIN

MUTE

BYPASS

GAIN1

GAIN0

SD

BSL

PVCCL

LOUT

PGNDL

VCLAMP

BSR

PVCCR

ROUT

PGNDR

VCLAMP

VCLAMP

AVDD

AVDD

AVDD/2

AVDD

AVDD

AVDD/2

REGULATOR

AGND

+

-

+

-

TPA3122D2

SLOS527A – DECEMBER 2007 – REVISED DECEMBER 2007

FUNCTIONAL BLOCK DIAGRAM

Copyright © 2007, Texas Instruments Incorporated

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TPA3122D2

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Содержание TPA3122D2

Страница 1: ...ended speakers or mono bridge tied load The Internal Oscillator No External Components TPA3122D2 can drive stereo speakers as low as 4 Required The efficiency of the TPA3122D2 eliminates the need for...

Страница 2: ...le of outputs high outputs switch at 50 duty cycle low MUTE 3 I outputs enabled TTL logic levels with compliance to AVCC BSL 18 I O Bootstrap I O for left channel PVCCL 1 Power supply for left channel...

Страница 3: ...are stress ratings only and functional operations of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied Exposure to absolute maxim...

Страница 4: ...wise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VCC 12 V Vripple 200 mVPP 100 Hz 30 dB KSVR Supply ripple rejection Gain 20 dB 1 kHz 48 dB VCC 12 V RL 4 f 1 kHz 4 Output Power at 1 THD N VCC 24...

Страница 5: ...E BYPASS GAIN1 GAIN0 SD BSL PVCCL LOUT PGNDL VCLAMP BSR PVCCR ROUT PGNDR VCLAMP VCLAMP AVDD AVDD AVDD 2 AVDD AVDD AVDD 2 REGULATOR AGND TPA3122D2 SLOS527A DECEMBER 2007 REVISED DECEMBER 2007 FUNCTIONA...

Страница 6: ...1 40 0 1 0 01 G005 1 10 THD N 10 Gain 20 dB RL 4 SE VCC 12 V VCC 24 V VCC 18 V PO Output Power W 0 01 0 1 1 40 0 1 0 01 G006 Gain 20 dB RL 8 SE 1 10 THD N 10 VCC 12 V VCC 24 V VCC 18 V TPA3122D2 SLOS5...

Страница 7: ...5 W RL 8 SE VCC 18 V Lfilt 47 mH Cfilt 0 22 F m Cdc 470 F m PVCC Supply Voltage V 0 5 10 15 10 12 14 16 18 20 P O Output Power W G011 THD N 10 THD N 1 Gain 20 dB RL 4 SE W PVCC Supply Voltage V 0 2 4...

Страница 8: ...60 40 20 0 f Frequency Hz PSRR dB G017 Gain 20 dB RL 4 SE VCC 12 V Vripple 200 mVp p 20 100 1k 20k 10k 20 100 1k 20k 10k f Frequency Hz 0 1 0 01 0 001 G018 Gain 20 dB RL 8 BTL VCC 24 V 1 THD N 10 PO...

Страница 9: ...al Output Power W 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 2 0 0 4 8 12 16 20 24 28 I CC Supply Current A G023 Gain 20 dB RL 8 BTL VCC 24 V VCC 12 V VCC 18 V 120 100 80 60 40 20 0 f Frequency Hz PSRR d...

Страница 10: ...n of the class D amplifier This phenomenon is most evident at low audio frequencies and when both channels are operating at the same frequency and phase At low levels power supply pumping results in d...

Страница 11: ...values given in Table 1 In the typical application an input capacitor I is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation In this case CI and the...

Страница 12: ...ency at a rate of 20dB decade The cutoff frequency is determined by fc 1 2 CoZL Table 2 shows some common component values and the associated cutoff frequencies Table 2 Common Filter Responses CSE DC...

Страница 13: ...maximum gate to source voltage for the NMOS output transistors is not exceeded one internal regulator clamps the gate voltage One 1 F capacitor must be connected from VCLAMP pin 11 for PWP and pin 9 f...

Страница 14: ...e device enters into the shutdown state and the outputs are disabled This is not a latched fault The thermal fault is cleared once the temperature of the die is reduced by 30 C The device begins norma...

Страница 15: ...ble of measuring the entire audio bandwidth A regulated dc power supply is used to reduce the noise and distortion injected into the APA through the power pins A System Two audio measurement system AP...

Страница 16: ...Hz 20 kHz RL b Traditional Class D Class D APA Signal Generator Power Supply RL Lfilt Cfilt TPA3122D2 SLOS527A DECEMBER 2007 REVISED DECEMBER 2007 Figure 30 Audio Measurement Systems 16 Submit Docume...

Страница 17: ...and the other to an amplifier input output The generator should have unbalanced outputs and the signal should be referenced to the generator ground for best results Unbalanced or balanced outputs can...

Страница 18: ...it The generator should have balanced outputs and the signal should be balanced for best results An unbalanced output can be used but it may create a ground loop that affects the measurement accuracy...

Страница 19: ...S Exempt This component has a RoHS exemption for either 1 lead based flip chip solder bumps used between the die and package or 2 lead based die adhesive used between the die and leadframe The compone...

Страница 20: ......

Страница 21: ...ce TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonabl...

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