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NXP Semiconductors TFA9812 manual

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  • Page 1

    1. General description The TF A9812 is a high-efficiency Bridge Tied Load (BTL) stereo Class-D audio amplifier with a digital I 2 S audio input. It is av ailable in a HVQFN48 pac kage with e xposed die paddle. The e xposed die paddle technology enhances the thermal and electr ical perf or mances of the de vice. The TF A9812 f eatures digital soun[...]

  • Page 2

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 2 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input n No high system clock required (PLL is ab le to lock on BCK) n No e xter nal heat sink required n 5 V tolerant digital inputs n Suppor ts dual coil inductor[...]

  • Page 3

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 3 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 4. Quic k reference data [1] I P is the current through the analog supply voltage (V DD A ) pin added to the current through the power supply voltage (V DDP [...]

  • Page 4

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 4 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 5. Or dering information T able 2. Ordering inf ormation T ype number Pa cka g e Name Description V ersion TF A9812HN HVQFN48 plastic ther mal enhanced very [...]

  • Page 5

    xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxx[...]

  • Page 6

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 6 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Figure 1 shows the b lock diagr am of the TF A9812. For a detailed description of the audio signal path see Section 8.1 . 7. Pinning inf ormation 7.1 Pinning[...]

  • Page 7

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 7 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 14 OUT2N O Negative PWM output channel 2 15 BOOT1P O Bootstrap high-side driver positiv e PWM output channel 1 16 OUT1P O P ositive PWM output channel 1 17 O[...]

  • Page 8

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 8 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8. Functional description 8.1 General The TF A9812 is a high-efficiency stereo BTL Class-D amplifier with a digital I 2 S audio input. It suppor ts all com[...]

  • Page 9

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 9 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input The bloc k control defines the operational control settings of the TF A9812 in line with the actual I 2 C settings and the pin-controlled settings. The PLL [...]

  • Page 10

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 10 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input • In Soft mute mode the I 2 S input signal is o verruled with a soft mute . – In Legacy control mode the analog input pin A V OL controls Soft mute mode[...]

  • Page 11

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 11 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] Under these conditions the mode is enabled by the appropriate I 2 C setting. In I 2 S slav e mode selection between BCK and MCLK cloc k modes is automat[...]

  • Page 12

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 12 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] The valid sample frequencies are shown in Section 9.5.7 . Legacy 32 8.192 12.288 18.432 (576 f s ) 44.1 11.2896 16.9344 25.4016 (576 f s ) 48 12.288 18.[...]

  • Page 13

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 13 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8.3 P ower -up/power -down 8.3.1 P ower -up Figure 3 and T able 10 describe the power-up timing while T able 11 sho ws the pin control f or initiating a pow[...]

  • Page 14

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 14 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input In I 2 C control mode communication is enab led after 4 ms. The pref erred I 2 C settings can be made within 66 ms bef ore the PLL star ts r unning. Finally[...]

  • Page 15

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 15 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Remark: Only MSB-first f or mats are suppor ted. 48 f s LSB-justified 16-bit data yes no 48 f s LSB-justified 18-bit data yes no 48 f s LSB-justified 20[...]

  • Page 16

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 16 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input In I 2 C control mode the f ollowing sample frequency f s can be used: 8 kHz, 11.025 kHz, 12 kHz, 16 kHz, 22.05 kHz, 24 kHz, 32 kHz, 44.1 kHz, 48 kHz, 64 kH[...]

  • Page 17

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 17 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input In the abov e equation f c is the center frequency and f s is the sample frequency . The definition of the quality f actor is the center frequency divided [...]

  • Page 18

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 18 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input (5) The ranges of the TF A9812 parametric equalizer settings f or each band are: • The Gain, G is from − 30 dB to +12 dB. • The center frequency , f c[...]

  • Page 19

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 19 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input (7) (8) In Equation 8 , M is the unsigned mantissa and E the negative signed e xponent. F or e xample, in word2 bits [14:8] = [0111 010] represent k 2 &apos[...]

  • Page 20

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 20 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8.5.2 Digital v olume control In I 2 C control mode both audio channels hav e separate digital v olume control. In Legacy control mode the v olume control o[...]

  • Page 21

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 21 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Section 9 shows the I 2 C address locations f or the digital gain control f or both channels. In Legacy mode the pin A V OL (32) can be used to control the [...]

  • Page 22

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 22 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input The I 2 C controls f or selecting the +24 dB gain can be found in Section 9.5.6 . The GAIN pin has no function In I 2 C mode. The TF A9812 f eatures also sp[...]

  • Page 23

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 23 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input The selected PWM s witching frequency is 400 kHz by def ault and can be set to 350 kHz, 700 kHz and 750 kHz in I 2 C control mode. In Legacy mode 400 kHz is[...]

  • Page 24

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 24 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8.7.1 Thermal foldbac k If the junction temperature of the TF A9812 e xceeds the programmab le Ther mal f oldback threshold temperature the gain of the ampl[...]

  • Page 25

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 25 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8.7.6 Overdissipation pr otection When the output current of the power amplifiers e xceeds a current v alue of 3 A and the temperature is abov e 140 ° C ,[...]

  • Page 26

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 26 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 8.7.11 In valid BCK pr otection The BCK clock signal is v erified as being at one of the allowed relativ e frequencies: 32 f s , 48 f s or 64 f s . If it i[...]

  • Page 27

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 27 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] See, Section 9.5.10 . [2] Window Protection is only check ed at power-up . 9. I 2 C b us interface and register settings 9.1 I 2 C bus interface The TF [...]

  • Page 28

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 28 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.3 I 2 C write cyc le description T able 25 shows the cycle required f or wr iting data to the I 2 C registers of the TF A9812. The byte siz e is 8 bits. T[...]

  • Page 29

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 29 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9. The TF A9812 sends the first byte . This is the most significant byte of the register . 10. The microcontroller asser ts an ackno wledge. 11. The TF A9[...]

  • Page 30

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 30 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Reser v ed registers or bits will be indicated by RSD . 0x11 0x7A40 R/W Section 9.5.5 Equalizer_C2 word_2 0x12 0x14A2 R/W Section 9.5.5 Equalizer_D2 word_1 [...]

  • Page 31

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 31 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.1 Interpolator settings and soft mute 9.5.2 V olume control T able 28. Register address 00h: miscellaneous I 2 C interpolator settings Bit 15 14 13 12 1[...]

  • Page 32

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 32 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.3 Digital input format 9.5.4 Equalizer configuration T able 31. Bit description of register 00h: miscellaneous I 2 C interpolator settings Bit Symbol D[...]

  • Page 33

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 33 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.5 Equalizer settings [1] Default settings are shown in T able 27 . The corresponding equalizer configuration is shown in T able 40 . [1] Default settin[...]

  • Page 34

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 34 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Fig 9. Equalizer configuration and register location mapping Left in Left out 2 × 5 or 2 × 10 Right in Right out 2 × 5 or 2 × 10 A1 C1 B1 D1 D2 D3 D4 D[...]

  • Page 35

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 35 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.6 PWM signal control T able 40. Default configuration equalizer for f s = 44.1 kHz Band A1/B1 A2/B2 A3/B3 A4/B4 A5/B5 C1/D1 C2/D2 C3/D3 C4/D4 C5/D5 F r[...]

  • Page 36

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 36 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.7 Digital-in cloc k configuration 9.5.8 Thermal foldbac k control T able 43. Register 2Dh: digital-in cloc k configuration Bit 15 14 13 12 11 10 9 8 S[...]

  • Page 37

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 37 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 9.5.9 TF A9812 temperature 9.5.10 Miscellaneous status T able 46. Bit description of register 2Dh: digital-in cloc k configuration Bit Symbol Description 9[...]

  • Page 38

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 38 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] The diagnostic pin 30 DIAG is flagged when se veral protection mechanisms ha ve been activ e, see Section 8.7 . 9.6 Overview of functional contr ol in [...]

  • Page 39

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 39 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] 32 kHz, 44.1 kHz and 48 kHz suppor ted [2] Bypass. [3] Special Legacy mode implementation. [4] 10 % clip lev el. [5] 400 kHz. 10. Internal cir cuitr y C[...]

  • Page 40

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 40 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 4 ST ABA 41 ST ABD 5 REF A 6V DD A 7 TEST1 9 ST AB2 28 ST AB1 10/11 V SSP2 18/19 V DDP 26/27 V SSP1 12 BOO T2N 15 BOO T1P 22 BOO T2P 25 BOO T1N T able 52. I[...]

  • Page 41

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 41 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 13/14 OUT2N 16/17 OUT1P 20/21 OUT2P 23/24 OUT1N 29 DIA G 30 CDELA Y 31 PO WERUP 33 ENABLE 34 GAIN 35 CSEL 36 ADSEL2/PLIM2 37 ADSEL1/PLIM1 43 TEST2 T able 52[...]

  • Page 42

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 42 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 11. Limiting v alues 38 SCL/SFOR 39 SD A/MS 45 WS 46 BCK 47 MCLK T able 52. Internal circuitry …continued Pin Symbol Equivalent cir cuitry 010aaa473 V SS1[...]

  • Page 43

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 43 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] V ss = V SS1 = V SS2 = REF A = REFD 12. Thermal characteristics [1] Measured in a JEDEC high K-factor test board (standard EIA/JESD 51-7). [2] Measured [...]

  • Page 44

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 44 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 13. Characteristics 13.1 DC Characteristics T able 55. DC characteristics Unless specified otherwise, V DD A =V DDP = 12 V , V SSP1 = V SSP2 = 0 V , V DD A[...]

  • Page 45

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 45 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input V OH HIGH-le vel output voltage At I OH = − 0.4 mA V DDD(3V3) − 0.4 V - - V V OL LO W-le v el output voltage At I OL = 4 mA - - 400 mV C L load capacita[...]

  • Page 46

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 46 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] I P is the current through the analog supply voltage (V DD A ) pin added to the current through the power supply v oltage (V DDP ) pin. [2] Ther mal f o[...]

  • Page 47

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 47 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 13.2 A C characteristics T able 56. A C characteristics Unless specified otherwise, V DD A =V DDP = 12 V , V DD A(3V3) =V DDD(3V3) = 3.3 V , T amb =2 5 ° [...]

  • Page 48

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 48 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] R s is the series resistance of inductor of low-pass LC filter in the application. [2] Output power measured across the loudspeaker load. This is based[...]

  • Page 49

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 49 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input [1] C b is the total capacitance of one bus line in pF . The maximum capacitive load f or each bus line is 400 pF . [2] After this period, the first clock [...]

  • Page 50

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 50 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input δ max = Maximum duty f actor (0.96). The output power at 10 % THD can be estimated using Equation 11 : (11) Figure 11 and Figure 12 show the estimated outp[...]

  • Page 51

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 51 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input Remark: A 4.8 Ω speaker (6 Ω speaker with 20 % spread) in BTL configuration can be used up to a supply voltage of 17 V without running into current lim[...]

  • Page 52

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  • Page 53

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  • Page 54

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  • Page 55

    xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxx[...]

  • Page 56

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 56 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 14.5 Curves measured in typical application (1) f i = 6 kHz (2) f i = 1 kHz (3) f i = 100 Hz (1) f i = 6 kHz (2) f i = 1 kHz (3) f i = 100 Hz a. V P = 12 V [...]

  • Page 57

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 57 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input a. V P = 12 V ; R L = 2 × 6 Ω ; P o = 1 W b . V P = 12 V ; R L = 2 × 8 Ω ; P o = 1 W Fig 18. T otal harmonic distor tion-plus-noise as a function of f[...]

  • Page 58

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 58 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input V P = 12 V ; V ripple = 500 mV (RMS) reference to ground; No input signal (1) R L = 8 Ω (2) R L = 6 Ω V P = 15 V ; 20 kHz AES17 filter (1) R L = 2 × 8[...]

  • Page 59

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 59 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input (1) P ower limiter = 0 dB (2) P ower limiter = − 1.5 dB (3) P ower limiter = − 3 dB (4) P ower limiter = − 4.5 dB (1) P ower limiter = 0 dB (2) P ower[...]

  • Page 60

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 60 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input V P = 12 V ; f i = 1 kHz; P ower dissipation in junction only (1) R L = 2 × 6 Ω (2) R L = 2 × 8 Ω V P = 12 V ; f i = 1 kHz; η po = (2 × P o ) / (2 ?[...]

  • Page 61

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 61 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 15. P ac kage outline Fig 28. Pac kage outline SOT619-8 (HVQFN48) REFERENCES OUTLINE VERSION EUROPEAN PROJECTION ISSUE DATE IEC JEDEC JEITA SOT619-8 - - - M[...]

  • Page 62

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 62 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 16. Handling inf ormation It is advisable to abide b y the nor mal precautions appropriate to handling MOS devices .[...]

  • Page 63

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 63 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 17. Revision history T able 59. Revision history Document ID Release date Data sheet status Change notice Supersedes TF A9812_2 20090122 Preliminar y data s[...]

  • Page 64

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 64 of 66 NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 18. Legal inf ormation 18.1 Data sheet status [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ?[...]

  • Page 65

    TF A9812_2 © NXP B.V . 2009. All rights reser ved. Preliminary data sheet Rev . 02 — 22 January 2009 65 of 66 continued >> NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input 20. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . .[...]

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    NXP Semiconductors TF A9812 BTL stereo Class-D audio amplifier with I 2 S input © NXP B.V . 2009. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 22 January 2009 Document identifier: TFA9812_2 Please be aware that important not[...]