TDA7492P13TR

TDA7492P 25 W + 25 W dual BTL class-D audio amplifier Datasheet - production data Description The TDA7492P is a dual BTL class-D audio amplifier with single power supply, designed for LCD TVs and monitors. Thanks to the high efficiency and exposed-paddown (EPD) package no heatsink is required. PowerSSO-36 with exposed pad down Features  25 W + 25 W continuous output power at THD = 10% with VCC = 20 V and RL = 8   Wide-range single-supply operation (8 - 26 V)  High efficiency ( = 90%)  Four selectable, fixed gain settings of nominally 21.6 dB, 27.6 dB, 31.1 dB and 33.6 dB  Differential inputs minimize common-mode noise  Standby and mute features  Short-circuit protection  Thermal overload protection  Externally synchronizable  ECOPACK®, environmentally-friendly package Table 1. Device summary Order code Operating temp. range Package Packaging TDA7492P13TR -40 to 85 °C PowerSSO-36 EPD Tape and reel February 2014 This is information on a product in full production. DocID15068 Rev 6 1/27 www.st.com Contents TDA7492P Contents 1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 4 2.1 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1 Characterizations for 6  loads with 18 V . . . . . . . . . . . . . . . . . . . . . . . . 10 4.2 Characterizations for 8  loads with 20 V . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 6 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.1 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6.2 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.3 Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6.4 Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6.4.1 Master mode (internal clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6.4.2 Slave mode (external clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 6.5 Output low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6.6 Protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6.7 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2/27 DocID15068 Rev 6 TDA7492P List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin description list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 How to set up SYNCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 PowerSSO-36 EPD dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 DocID15068 Rev 6 3/27 27 List of figures TDA7492P List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. 4/27 Internal block diagram (showing one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin connections (top view, PCB view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 THD at 1 kHz vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 THD at 100 Hz vs. output power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 THD at 1 W vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Crosstalk vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 FFT 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 FFT -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Output power vs supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 THD at 1 kHz vs output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 THD at 100 Hz vs output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 THD at 1 W vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Crosstalk vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 FFT 0 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 FFT -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Test board (SZ-LAB-TDA7492P) layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Applications circuit for class-D amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Standby and mute circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Turn-on/off sequence for minimizing speaker “pop” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Device input circuit and frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Master and slave connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Typical LC filter for a 8  speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Typical LC filter for a 4  speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Behavior of pin DIAG for various protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 PowerSSO-36 EPD outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 DocID15068 Rev 6 TDA7492P 1 Device block diagram Device block diagram Figure 1 shows the block diagram of one of the two identical channels of the TDA7492P. Figure 1. Internal block diagram (showing one channel only) DocID15068 Rev 6 5/27 27 Pin description TDA7492P 2 Pin description 2.1 Pinout Figure 2. Pin connections (top view, PCB view) 6/27 SUB_GND 1 36 VSS OUTPB 2 35 SVCC OUTPB 3 34 VREF PGNDB 4 33 INNB PGNDB 5 32 INPB PVCCB 6 31 GAIN1 PVCCB 7 30 GAIN0 OUTNB 8 29 SVR OUTNB 9 28 DIAG OUTNA 10 27 SGND OUTNA 11 26 VDDS PVCCA 12 25 SYNCLK PVCCA 13 24 ROSC PGNDA 14 23 INNA PGNDA 15 22 INPA OUTPA 16 21 MUTE OUTPA 17 20 STBY PGND 18 19 VDDPW Exposed pad down (Connect to ground) DocID15068 Rev 6 TDA7492P 2.2 Pin description Pin list Table 2. Pin description list Pin n° Name Type Description 1 SUB_GND PWR Connect to the frame 2,3 OUTPB O Positive PWM for right channel 4,5 PGNDB PWR Power stage ground for right channel 6,7 PVCCB PWR Power supply for right channel 8,9 OUTNB O Negative PWM output for right channel 10,11 OUTNA O Negative PWM output for left channel 12,13 PVCCA PWR Power supply for left channel 14,15 PGNDA PWR Power stage ground for left channel 16,17 OUTPA O Positive PWM output for left channel 18 PGND PWR Power stage ground 19 VDDPW O 3.3-V (nominal) regulator output referred to ground for power stage 20 STBY I Standby mode control 21 MUTE I Mute mode control 22 INPA I Positive differential input of left channel 23 INNA I Negative differential input of left channel 24 ROSC O Master oscillator frequency-setting pin 25 SYNCLK I/O Clock in/out for external oscillator 26 VDDS O 3.3-V (nominal) regulator output referred to ground for signal blocks 27 SGND PWR Signal ground 28 DIAG O Open-drain diagnostic output 29 SVR O Supply voltage rejection 30 GAIN0 I Gain setting input 1 31 GAIN1 I Gain setting input 2 32 INPB I Positive differential input of right channel 33 INNB I Negative differential input of right channel 34 VREF O Half VDDS (nominal) referred to ground 35 SVCC PWR Signal power supply 36 VSS O 3.3-V (nominal) regulator output referred to power supply - EP PWR Exposed pad for connection to ground plane as heatsink DocID15068 Rev 6 7/27 27 Electrical specifications TDA7492P 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol 3.2 Parameter Value Unit VCCMAX DC supply voltage for pins PVCCA, PVCCB, SVCC 30 V VI Voltage limits for input pins STANDBY, MUTE, INNA, INPA, INNB, INPB, GAIN0, GAIN1 -0.3 to 3.6 V Top Operating temperature -40 to 85 °C Tj Junction temperature -40 to 150 °C Tstg Storage temperature -40 to 150 °C Thermal data Table 4. Thermal data Symbol Parameter Rth j-case Thermal resistance, junction to case Rth j-amb Min - Thermal resistance, junction to ambient Typ 2 - 24 (1) Max Unit 3 °C/W - °C/W 1. FR4 with vias to copper area of 9 cm2 3.3 Electrical specifications Unless otherwise stated, the results in Table 5 below are given for the conditions: VCC = 20 V, RL (load) = 8 , ROSC = R3 = 39 k, C8 = 100 nF, f = 1 kHz, GV = 21.6 dB, and Tamb = 25 °C. Table 5. Electrical specifications Symbol 8/27 Parameter Condition Min Typ Max Unit VCC Supply voltage for pins PVCCA, PVCCB, SVCC - 8 - 26 V Iq Total quiescent - - 26 35 mA IqSTBY Quiescent current in standby - - 2.5 5.0 µA Play mode - - ±100 mV VOS Output offset voltage Mute mode - - ±60 mV IOCP Overcurrent protection threshold RL = 0  3.8 4.2 - A TjSD Junction temperature at thermal shutdown - - 150 - °C Ri Input resistance Differential input 48 60 - k DocID15068 Rev 6 TDA7492P Electrical specifications Table 5. Electrical specifications (continued) Symbol Parameter Condition Min Typ Max Unit VOVP Overvoltage protection threshold - 28 29 - V VUVP Undervoltage protection threshold - - - 7 V High side - 0.2 - RdsON Power transistor on resistance Low side - 0.2 - THD = 10% - 25 - Po Output power THD = 1% - 20 - 9.5 - Output power VCC = 12 V, THD = 10% - Po VCC = 12 V, THD = 1% - 7.2 - PD Power dissipated by device Po = 25 W + 25 W, THD = 10% - 5.0 - W  Efficiency Po = 10 W + 10 W 80 90 - % THD Total harmonic distortion Po = 1 W - 0.1 0.4 % GAIN0 = L, GAIN1 = L 20.6 21.6 22.6 GAIN0 = L, GAIN1 = H 26.6 27.6 28.6 GAIN0 = H, GAIN1 = L 30.1 31.1 32.1 GAIN0 = H, GAIN1 = H 32.6 33.6 34.6 GV  W W Closed-loop gain dB GV Gain matching - - - ±1 dB CT Cross talk f = 1 kHz - 50 - dB 20 - Total input noise A Curve, GV = 20 dB - eN f = 22 Hz to 22 kHz - 25 35 µV SVRR Supply voltage rejection ratio fr = 100 Hz, Vr = 0.5 V, CSVR = 10 µF 40 50 - dB Tr, Tf Rise and fall times - - 50 - ns fSW Switching frequency Internal oscillator 290 310 330 kHz 250 - 400 250 - 400 2.3 - - - - 0.8 60 80 - fSWR Output switching frequency range VinH Digital input high (H) VinL Digital input low (L) AMUTE Mute attenuation With internal oscillator (1) With external oscillator (2) kHz VMUTE = 1 V V dB 1. fSW = 106 / ((16 * ROSC + 182) * 4) kHz, fSYNCLK = 2 * fSW with R3 = 39 k, see Figure 20. 2. fSW = fSYNCLK / 2 with the frequency of the external oscillator. DocID15068 Rev 6 9/27 27 Characterization curves 4 TDA7492P Characterization curves The following characterizations were made using the SZ-LAB-TDA7492P demo board. The layout is shown in Figure 19 on page 16. The LC filter for the 6  load used 22 µH and 220 nF components, whilst that for the 8  load used 33 µH and 220 nF. 4.1 Characterizations for 6  loads with 18 V Figure 3. Output power vs. supply voltage 28 26 Vcc = 8 to 18 V, 24 RL = 6 Ω, 22 Rosc = 39 kΩ, Cosc = 100 nF, 20 Output power (W) Test conditions: f = 1 kHz, Gv = 30 dB, Tamb = 25r C Specification limit: THD = 10% 18 16 14 THD = 1% 12 10 8 Typical: 6 Vcc =18 V, RL = 6 Ω 4 Po = 25 W @THD = 10% 2 0 Po = 20 W @THD = 1% 8 9 10 11 12 13 14 15 16 17 18 Supply voltage (V) Figure 4. THD at 1 kHz vs. output power 10 5 Test conditions: Vcc = 18 V, RL = 6 Ω, Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, THD (%) 2 1 0.5 Gv = 30 dB, Tamb = 25r C 0.2 0.1 0.05 Specification limit: Typical: 0.02 Po = 25 W @THD = 10% 0.01 0.005 200m 500m 1 2 Output power (W) 10/27 DocID15068 Rev 6 5 10 20 30 TDA7492P Characterization curves Figure 5. THD at 100 Hz vs. output power 10 5 Test conditions: THD (%) Vcc = 18 V, RL = 6 Ω, 2 Rosc = 39 kΩ, Cosc = 100 nF, 1 f = 100 Hz, 0.5 Gv = 30 dB, Tamb = 25r C 0.2 0.1 0.05 Specification limit: 0.02 Typical: 0.01 Po = 25 W @THD = 10% 0.005 200m 500m 1 2 5 10 2k 5k 20 30 2XWSXWSRZHU: Figure 6. THD at 1 W vs. frequency 0.5 Test conditions: Vcc = 18 V, THD (%) RL = 6 Ω, 0.2 Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, 0.1 Gv = 30 dB, Po = 1 W 0.05 Tamb = 25r C 0.02 0.01 Specification limit: Typical: THD < 0.4% 0.005 20 50 100 200 500 1k 10k 20k Frequency (Hz) Figure 7. Frequency response +2 Test conditions: Vcc = 18 V, RL = 6 Ω, Ampl Rosc = 39 kΩ, Cosc = 100 nF, (dB) +1 -0 f = 1 kHz, Gv = 30 dB, -1 Po = 1 W Tamb = 25r C -2 -3 Specification limit: Max: -4 +/-3 dB @20 Hz to 20 kHz -5 10 20 50 100 200 500 1k 2k 5k 10k 30k Frequency (Hz) DocID15068 Rev 6 11/27 27 Characterization curves TDA7492P Figure 8. Crosstalk vs frequency -60 Test conditions: -65 Vcc = 18 V, Crosstalk RL = 6 Ω, (dB) -70 -75 Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, -80 Gv = 30 dB, -85 Po = 1 W -90 Tamb = 25r C -95 -100 -105 Specification limit: -110 Typical: -115 > 50 dB @f = 1 kHz -120 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 9. FFT 0 dB +10 Test conditions: +0 FFT -10 (dB) -20 Vcc = 18 V, RL = 6 Ω, -30 Rosc = 39 kΩ, Cosc = 100 nF, -40 f = 1 kHz, -50 Gv = 30 dB, -60 Po = 1 W -70 Tamb = 25r C -80 -90 -100 -110 Specification limit: -120 Typical: -130 > 60 dB for the harmonic frequency -140 -150 20 50 100 200 500 1k 2k 5k 10k Frequency (Hz) Figure 10. FFT -60 dB +0 -10 Test conditions: Vcc = 18 V, FFT -20 RL = 6 Ω, (dB) -30 Rosc = 39 kΩ, Cosc = 100 nF, -40 f = 1 kHz, -50 Gv = 30 dB, -60 Po = -60 dB @1 W = 0 dB -70 Tamb = 25r C -80 -90 -100 -110 Specification limit: -120 Typical: -130 > 90dB for the harmonic frequency -140 -150 20 50 100 200 500 1k Frequency (Hz) 12/27 DocID15068 Rev 6 2k 5k 10k 20k 20k TDA7492P Characterizations for 8  loads with 20 V Figure 11. Output power vs supply voltage 28 Test conditions: 26 Vcc = 8 to 20 V, 24 RL = 8 Ω, Output power (W) 4.2 Characterization curves Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, Gv = 30 dB, Tamb = 25r C 22 20 THD = 10% 18 16 14 12 THD = 1% 10 Specification limit: 8 Typical: 6 Vs = 20 V, RL = 8 Ω 4 Po = 25 W @THD = 10% 2 8 Po = 20 W @THD = 1% 9 10 11 12 13 14 15 16 17 18 19 20 Supply voltage (V) Figure 12. THD at 1 kHz vs output power 10 Test conditions: Vcc = 20 V, RL = 8 Ω, Rosc = 39 kΩ, Cosc = 100 nF, 5 THD (%) 2 1 f = 1 kHz, 0.5 Gv = 30 dB, Tamb = 25r C 0.2 0.1 0.05 Specification limit: Typical: 0.02 Po = 25 W @THD = 10% 0.01 0.005 100m 200m 500m 1 2 5 10 20 30 Output power (W) DocID15068 Rev 6 13/27 27 Characterization curves TDA7492P Figure 13. THD at 100 Hz vs output power 10 Test conditions: 5 THD (%) Vcc = 20 V, RL = 8 Ω, 2 Rosc = 39 kΩ, Cosc = 100 nF, 1 f = 100 Hz, 0.5 Gv = 30 dB, Tamb = 25r C 0.2 0.1 0.05 Specification limit: 0.02 Typical: 0.01 Po = 25 W @THD = 10% 0.005 100m 200m 500m 1 2 5 10 20 30 Output power (W) Figure 14. THD at 1 W vs frequency 0.5 Test conditions: Vcc = 20 V, RL = 8 Ω, Rosc = 39 kΩ, Cosc = 100 nF, 0.2 THD (%) f = 1 kHz, 0.1 Gv = 30 dB, Po = 1 W 0.05 Tamb = 25r C 0.02 Specification Limit: 0.01 Typical: THD < 0.4% 0.005 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 15. Frequency response +2 Test conditions: Vcc = 20 V, RL = 8 Ω, Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, +1 Ampl (dB) -0 Gv = 30 dB, -1 Po = 1 W Tamb = 25r C -2 -3 Specification limit: Max: -4 +/-3 dB @20 Hz to 20 kHz -5 10 20 50 100 200 500 1k Frequency (Hz) 14/27 DocID15068 Rev 6 2k 5k 10k 20k 30k TDA7492P Characterization curves Figure 16. Crosstalk vs frequency -60 Test conditions: TTTTTTTTTTT TTTT T TTTTT -65 Vcc = 20 V, Crosstalk RL = 8 Ω, (dB) -70 -75 Rosc = 39 kΩ, Cosc = 100 nF, f = 1 kHz, -80 Gv = 30 dB, -85 Po = 1 W -90 Tamb = 25r C -95 -100 -105 Specification limit: -110 Typical: -115 > 50 dB @f = 1 kHz -120 20 50 100 200 500 1k 2k 5k 10k 20k 2k 5k 10k 20k 5k 10k 20k Frequency (Hz) Figure 17. FFT 0 dB +10 Test conditions: +0 Vcc = 20 V, FFT RL = 8 Ω (dB) -10 -20 Rosc = 39 kΩ, Cosc = 100 nF, -30 f = 1 kHz, -40 -50 Gv = 30 dB, -60 Po = 1 W -70 Tamb = 25r C -80 -90 -100 -110 Specification limit: -120 Typical: -130 > 60 dB for the harmonic frequency -140 -150 20 50 100 200 500 1k Frequency (Hz) Figure 18. FFT -60 dB +0 Test conditions: Vcc = 20 V, RL = 8 Ω, Rosc = 39 kΩ, Cosc = 100 nF, -10 FFT (dB) -20 -30 -40 f = 1 kHz, -50 Gv = 30 dB, -60 Po = -60 dB (1 W = 0 dB) -70 Tamb = 25r C -80 -90 -100 Specification limit: Typical: > 90 dB for the harmonic frequency -110 -120 -130 -140 -150 20 50 100 200 500 1k 2k Frequency (Hz) DocID15068 Rev 6 15/27 27 Characterization curves TDA7492P 2. Test Board Figure 19. Test board (SZ-LAB-TDA7492P) layout 16/27 DocID15068 Rev 6 Applications circuit TDA7492P 5 Figure 20. Applications circuit for class-D amplifier  & Q) & Q) 6*1' & Q) & Q) 6*1' Jumper settings for gain: 68%B*1' 2873$  /  ,13$ 2873$  X+  ,11$  9''6  & Q) 5 N  0V:0V 21.6 dB 0 V : 3.3 V 27.6 dB 5 6LQJOH(QGHG ',$* - 5 - & 9''6 Q) ',$* 39&&$  / 2871$  DocID15068 Rev 6 31.1 dB 3.3 V : 3.3 V 33.6 dB  6