TDA7491P STMicroelectronics, TDA7491P Datasheet
TDA7491P
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TDA7491P Summary of contents
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... LCD TVs and monitors. Thanks to the high efficiency and exposed-pad-down (EPD) package no separate heatsink is required. Furthermore, the filterless operation allows a reduction in the external component count. The TDA7491P is pin to pin compatible with the TDA7491LP and TDA7491HV. PowerSSO-36 EPD PowerSSO-36 EPD Doc ID 13540 Rev 4 TDA7491P ...
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... Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 7.4 Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 7.4.1 7.4.2 7.5 Filterless modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7.6 Output low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 7.7 Protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.8 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 7.9 Heatsink requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2/ Master mode (internal clock Slave mode (external clock Doc ID 13540 Rev 4 TDA7491P ...
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... TDA7491P 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Doc ID 13540 Rev 4 Contents 3/40 ...
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... List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pin description list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 4. Thermal data Table 5. Electrical specifications Table 6. PowerSSO-36 EPD dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 7. Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Table 8. Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 9. How to set up SYNCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 10. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 4/40 Doc ID 13540 Rev 4 TDA7491P ...
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... Closed-loop gain vs frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 43. Current consumption vs voltage on pin MUTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 44. Attenuation vs voltage on pin MUTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 45. Current consumption vs voltage on pin STBY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 46. Attenuation vs voltage on pin STBY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 47. Test board (TDA7491P) layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 48. PowerSSO-36 EPD outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Doc ID 13540 Rev 4 List of figures 5/40 ...
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... Master and slave connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 54. Unipolar PWM output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Figure 55. Typical LC filter for a 8-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 56. Typical LC filter for a 4-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 57. Behavior of pin DIAG for various protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Figure 58. Power derating curves for PCB used as heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 6/40 Doc ID 13540 Rev 4 TDA7491P ...
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... TDA7491P 1 Device block diagram Figure 1 shows the block diagram of one of the two identical channels of the TDA7491P. Figure 1. Internal block diagram (one channel only) Doc ID 13540 Rev 4 Device block diagram 7/40 ...
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... PVCCB PVCCB OUTNB OUTNB OUTNA OUTNA PVCCA PVCCA PGNDA PGNDA OUTPA OUTPA 8/ exposed pad down Connect to ground PGND Doc ID 13540 Rev 4 TDA7491P VSS 36 SVCC 35 VREF 34 INNB 33 INPB 32 GAIN1 31 GAIN0 30 SVR 29 DIAG 28 SGND 27 VDDS 26 SYNCLK 25 ROSC 24 INNA 23 INPA 22 21 MUTE STBY 20 19 ...
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... TDA7491P 2.2 Pin list Table 2. Pin description list Number Name 1 SUB_GND 2,3 OUTPB 4,5 PGNDB 6,7 PVCCB 8,9 OUTNB 10,11 OUTNA 12,13 PVCCA 14,15 PGNDA 16,17 OUTPA 18 PGND 19 VDDPW 20 STBY 21 MUTE 22 INPA 23 INNA 24 ROSC 25 SYNCLCK 26 VDDS 27 SGND 28 DIAG 29 SVR 30 GAIN0 31 GAIN1 ...
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... Section 7.9: Heatsink requirements on page Table 5 below are given for the conditions kΩ 100 nF kHz, G OSC Parameter Condition - Without LC filter - Play mode Mute mode = 0 Ω Differential input Doc ID 13540 Rev 4 TDA7491P Value Unit °C -40 to 150 °C -40 to 150 °C Min Typ Max Unit - 2 3 ° ...
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... TDA7491P Table 5. Electrical specifications (continued) Symbol Undervoltage protection V UVP threshold R Power transistor on resistance dsON P Output power o P Output power o P Dissipated power D η Efficiency THD Total harmonic distortion G Closed loop gain V ∆G Gain matching V CT Cross talk eN Total input noise SVRR ...
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... Characterization curves The following characterization curves were made using the TDA7491P demo board. The LC filter for the 4-Ω load uses components of 15 µH and 470 nF, whilst that for the 6-Ω load uses 22 µH and 220 nF and that for the 8-Ω load uses 33 µH and 220 nF. ...
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... TDA7491P Figure 5. THD vs frequency Test Condition: Vcc=10V, RL=4 ohm, Rosc=39kΩ, Cosc=100nF 1kHz, Gv=30dB, Po=1W Tamb=25℃ Specification Limit: Typical: THD <0.5% Figure 6. Frequency response Test Condition: Vcc =10V, RL= 4 ohm, Rosc=39kΩ, Cosc=100nF 1kHz 30dB, Po =1W Tamb = 25℃ Specification Limit: ...
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... Frequency (Hz) +0 -10 -20 Ripple frequency=100Hz -30 Ripple voltage=500mV - - -60 -70 -80 -90 -100 20 50 100 200 500 Hz 4 ohm 10 v PSRR.at27 Doc ID 13540 Rev 4 TDA7491P 2k 5k 10k 20k 2k 5k 10k 20k 10k 20k ...
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... TDA7491P Figure 11. Power dissipation and efficiency vs output power Test Condition: Vcc =10V, RL= 4 ohm, Rosc = 39kΩ, Cosc = 100nF 1kHz, Gv=30dB, Tamb=25℃ Figure 12. Closed-loop gain vs frequency Test Condition: Vcc =10V, RL= 4 ohm, Rosc = 39kΩ, Cosc = 100nF 1kHz, 0dB@f=1kHz, Po=1w, Gain=32dB, Tamb=25℃ ...
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... Gv=30dB, Tamb=25℃ 16/ -10 -20 -30 -40 -50 -60 -70 -80 - Mute voltage ( Vcc=10V 25 Rload=4ohm 20 Gain=30dB Vin 0.5 1 1.5 Standby voltage (V) 0 -20 Vcc=10V -40 Rload=4ohm Gain=30dB -60 0dB@f=1kHz, Po=1w -80 -100 -120 0 0.5 1 1.5 Standby voltage (V) Doc ID 13540 Rev 4 TDA7491P Vcc=10V Rload=4ohm Gain=30dB 0dB@f=1kHz, Po= 2.5 3 3.5 2 2.5 3 3.5 ...
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... TDA7491P 4.2 With 6-Ω load at V Figure 17. Output power vs supply voltage Test Condition : Vcc = 5~11V ohm, Rosc = 39kO, Cosc = 100nF, f =1kHz 30dB, Tamb = 25℃ Specification Limit: Typical: Vs =11V,Rl =6 ohm Po =10W @THD=10% Po =8W @THD=1% Figure 18. THD vs output power (1 kHz) Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ ...
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... THD (%) 0.5 0.2 0.1 0.05 0.02 0.01 0.005 200m 500m 1 Output Power (W) THD (%) 1 0.5 0.2 0.1 0.05 0.02 0.01 0.005 20 50 100 200 500 Frequency (Hz) Ampl (dB 100 200 500 Frequency (Hz) Doc ID 13540 Rev 4 TDA7491P 10k 20k 10k 30k ...
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... TDA7491P Figure 22. Crosstalk vs frequency Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF 1kHz, Gv =30dB, Po =1W Tamb=25℃ Specification Limit: Typical: >50dB (@ f =1kHz) Figure 23. FFT (0 dB) Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF, f =1kHz, Gv =30dB, Po =1W Tamb =25℃ ...
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... PSRR.at27 100 Output power per channel (W) +2 Gain=22dB +1.5 Gain=32dB +1 +0 Gain=26dB Gain=30dB -1 -2.5 -3 -3 100 200 Doc ID 13540 Rev 4 TDA7491P 500 10k 20k Hz 3 2.5 2 1.5 Vcc=11V Rload=6ohm 1 Gain=30dB f=1kHz 0 500 10k Hz 20k 30k ...
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... TDA7491P Figure 28. Current consumption vs voltage on pin MUTE Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF, Vin=0, Gv =30dB, Tamb =25℃ Figure 29. Attenuation vs voltage on pin MUTE Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF, f=1kHz, 0dB@f=1kHz, Po=1w, Gv =30dB, Tamb =25℃ ...
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... Rosc =39k O , Cosc =100nF, f =1kHz, Gv =30dB, Tamb =25℃ Specification Limit: Typical: Vs =12V, ohm Po =9.5W @THD =10% Po =7.2W @THD =1% 22/40 0 -20 Vcc=11V -40 Rload=6ohm Gain=30dB -60 0dB@f=1kHz, Po=1w -80 -100 -120 0 1 Standby voltage ( ohm 5 f =1kHz Supply Voltage (V) Doc ID 13540 Rev 4 TDA7491P THD =10% THD = ...
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... TDA7491P Figure 33. THD vs output power (1 kHz) Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f =1kHz, Gv =30dB, Tamb =25℃ Specification Limit: Typical: Po =9.5W @ THD =10% Figure 34. THD vs output power (100 Hz) Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, ...
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... Frequency (Hz) FFT (dB) +10 +0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 20 50 100 200 500 1k Frequency (Hz) Doc ID 13540 Rev 4 TDA7491P 2k 5k 10k 30k 10k 20k 2k 5k 10k 20k ...
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... TDA7491P Figure 39. FFT (-60 dB) Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f =1kHz, Gv =30dB -60dB (@ 1W =0dB) Tamb =25℃ Specification Limit: Typical: > 90dB for the harmonic frequency Figure 40. Power supply rejection ratio vs frequency Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ ...
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... Gain=32dB -2 A -2.5 -3 -3 100 200 Vcc=12V 15 Rload=8ohm Gain=30dB Vin 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 0 0.5 1 Mute voltage (V) Doc ID 13540 Rev 4 TDA7491P Gain=30dB 500 10k Hz 1.5 2 2.5 3 3.5 Mute voltage (V) Vcc=12V Rload=8ohm Gain=30dB 0dB@f=1kHz, Po=1w 1.5 2 2.5 3 20k 30k 3.5 ...
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... TDA7491P Figure 45. Current consumption vs voltage on pin STBY Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, Vin=0, Gv =30dB, Tamb =25℃ Figure 46. Attenuation vs voltage on pin STBY Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f=1kHz, 0dB@f=1kHz,Po=1w, Gv =30dB, Tamb =25℃ ...
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... Characterization curves 4.4 Test board Figure 47. Test board (TDA7491P) layout 28/40 Doc ID 13540 Rev 4 TDA7491P ...
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... TDA7491P 5 Package mechanical data The TDA7491P comes in a 36-pin PowerSSO package with exposed pad down (EPD). Figure 48 below shows the package outline and Figure 48. PowerSSO-36 EPD outline drawing Table 6 gives the dimensions. Doc ID 13540 Rev 4 Package mechanical data 29/40 ...
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... Doc ID 13540 Rev 4 TDA7491P Dimensions in inches Min Typ 0.085 - 0.097 0.085 - 0.094 0.000 - 0.004 0.007 - 0.014 0.009 - 0.013 0.398 - 0.413 0.291 - 0.299 - 0.020 - - 0.335 - - 0.091 - - - 0.004 0.398 - 0 ...
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... TDA7491P 6 Applications circuit Figure 49. Applications circuit for class-D amplifier Input settings for gain: GAIN0 : GAIN1 3 3.3 V TDA7491P Input settings for standby, mute and play: Nominal gain STBY : MUTE 3.3 V Doc ID 13540 Rev 4 Applications circuit Mode Standby Standby Mute ...
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... Applications information 7.1 Mode selection The three operating modes of the TDA7491P are set by the two inputs STBY (pin 20) and MUTE (pin 21). Standby mode: all circuits are turned off, very low current consumption. Mute mode: inputs are connected to ground and the positive and negative PWM outputs are at 50% duty cycle ...
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... TDA7491P 7.2 Gain setting The gain of the TDA7491P is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin 31). Internally, the gain is set by changing the feedback resistors of the amplifier. Table 8. Gain settings GAIN0 7.3 Input resistance and capacitance The input impedance is set by an internal resistor kΩ (typical). An input capacitor (Ci) is required to couple the AC input signal ...
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... If two or more class-D amplifiers are used in the same system recommended that all devices operate at the same clock frequency. This can be implemented by using one TDA7491P as master clock, while the other devices are in slave mode (that is, externally clocked. The clock interconnect is via pin SYNCLK of each device. As explained below, SYNCLK is an output in master mode and an input in slave mode ...
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... TDA7491P can be used without a filter before the speaker, because the frequency of the TDA7491P output is beyond the audio frequency, the audio signal can be recovered by the inherent inductance of the speaker and natural filter of the human ear. Figure 54. Unipolar PWM output ...
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... It is necessary to choose the L-C component values depending on the loud speaker impedance. Some typical values, which give a cut-off frequency of 27 kHz, are shown in Figure 55 Figure 55. Typical LC filter for a 8-Ω speaker Figure 56. Typical LC filter for a 4-Ω speaker 36/40 and Figure 56 below. Doc ID 13540 Rev 4 TDA7491P ...
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... TDA7491P 7.7 Protection function The TDA7491P is fully protected against overvoltages, undervoltages, overcurrents and thermal overloads as explained here. Overvoltage protection (OVP) If the supply voltage exceeds the value for V page 10 the overvoltage protection is activated which forces the outputs to the high-impedance state. When the supply voltage drops to below the threshold value the device restarts ...
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... As with most amplifiers, the power dissipated within the device depends primarily on the supply voltage, the load impedance and the output modulation level. The maximum estimated power dissipation for the TDA7491P is less than 2 W. When properly mounted on the above PCB the junction temperature could increase by 48 °C. ...
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... TDA7491P 8 Revision history Table 10. Document revision history Date 02-Jul-2007 15-Oct-2008 23-Jun-2009 04-Sep-2009 Revision 1 Initial release. 2 Updated characterization curves. Updated text concerning oscillator R and C in Electrical specifications on page 10 Updated condition for Iq test, added V updated THD maximum value, updated STBY and MUTE voltages in ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 40/40 Please Read Carefully: © 2009 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 13540 Rev 4 TDA7491P ...