TDA7491LP ,5W+5W dual BTL class-D audio amplifierblock diagram (one channel only) . . . . . . 6Figure 2. Pin connection (top view, PCB view) ..
TDA7491LP13TR ,5W+5W dual BTL class-D audio amplifierApplications circuit . . 245.2 Mode selection . . . . . 255.3 Gain setting . . . . ..
TDA7491P ,10W+10W dual BTL class-D audio amplifierblock diagram (one channel only) . . . . . . 7Figure 2. Pin connection (top view, PCB view) ..
TDA7491P13TR ,10W+10W dual BTL class-D audio amplifierApplications circuit . . 295.2 Mode selection . . . . . 305.3 Gain setting . . . . ..
TDA7491P13TR ,10W+10W dual BTL class-D audio amplifierfeaturesLCD TVs and monitors.■ Short-circuit protectionThanks to the high efficiency and ■ Thermal ..
TDA7492 ,50 W + 50 W dual BTL class-D audio amplifierblock diagram (showing one channel only) . . . . . . . 6Figure 2. Pin connections (top view, PCB ..
THS3201DRG4 ,1.8GHz Current Feedback Amplifier 8-SOIC -40 to 85MAXIMUM RATINGS(1)Over operating free-air temperature range unless otherwise noted.UNITV Supply vol ..
THS3201MDGNREP ,Enhanced Product 1.8-Ghz Low Distortion Current Feedback Amplifier 8-MSOP-PowerPAD -55 to 125FEATURESDESCRIPTION2• Unity Gain Bandwidth: 1.8 GHz• High Slew Rate: 6700 V/μs (G = 2 V/V,The THS32 ..
THS3202 ,2GHz Current Feedback AmplifierThis integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated cir ..
THS3202D ,2GHz Current Feedback Amplifiermaximum ratings under any condition is limited by the constraints of the silicon process. Stresses ..
THS3202DGN ,2GHz Current Feedback Amplifier SLOS242F –SEPTEMBER 2002–REVISED JANUARY 2010PACKAGE DISSIPATION RATINGS(2)POWER RATING(1)qqJC JAP ..
THS3202DGNR ,2GHz Current Feedback AmplifierFEATURES DESCRIPTION23• Unity-Gain Bandwidth: 2 GHzThe THS3202 is a dual current-feedback amplifier ..
TDA7491LP-TDA7491LP13TR
5W+5W dual BTL class-D audio amplifier
March 2011 Doc ID 13541 Rev 5 1/37
TDA7491LP2 x 5-watt dual BTL class-D audio amplifier
Features 5 W + 5 W continuous output power:
RL = 8 Ω, THD = 10% at VCC = 9 V 5 W + 5 W continuous output power:
RL = 4 Ω, THD = 10% at VCC = 6.6 V Wide range single supply operation (5 V - 14 V) High efficiency (η = 90%) Four selectable, fixed gain settings of
nominally 20 dB, 26 dB, 30 dB and 32 dB Differential inputs minimize common-mode
noise Filterless operation No ‘pop’ at turn-on/off Standby and mute features Short-circuit protection Thermal overload protection Externally synchronizable
DescriptionThe TDA7491LP 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-pad-down (EPD) package no separate
heatsink is required.
Furthermore, the filterless operation allows a
reduction in the external component count.
The TDA7491LP is pin-to-pin compatible with the
TDA7491P and TDA7491HV.
Table 1. Device summary
Contents TDA7491LP2/37 Doc ID 13541 Rev 5
Contents Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Pin out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.1 With 4-Ω load at VCC = 6.6 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 With 8-Ω load at VCC = 9 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245.1 Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.4 Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.5 Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.1 Master mode (internal clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5.2 Slave mode (external clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.6 Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.6.1 Reconstruction low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.6.2 Filterless modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.7 Protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.8 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.9 Heatsink requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.10 T est board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
TDA7491LP Contents
Doc ID 13541 Rev 5 3/37
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
List of tables TDA7491LP
4/37 Doc ID 13541 Rev 5
List of tables
Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 7. Gain settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 8. How to set up SYNCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 9. PowerSSO-36 EPD dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 10. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
TDA7491LP List of figures
Doc ID 13541 Rev 5 5/37
List of figures
Figure 1. Internal block diagram (one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view, PCB view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. THD vs. output power (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. THD vs. output power (100 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 8. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 9. FFT (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 10. FFT (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11. Power supply rejection ratio vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13. Attenuation vs. voltage on pin MUTE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 14. Current consumption vs. voltage on pin STBY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 15. Attenuation vs. voltage on pin STBY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 16. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 17. THD vs. output power (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 18. THD vs. output power (100 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 19. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 20. Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 21. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 22. FFT (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 23. FFT (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 24. Power supply rejection ratio vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 25. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 26. Applications circuit for class-D amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 27. Standby and mute circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 28. Turn-on/off sequence for minimizing speaker “pop” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 29. Device input circuit and frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 30. Master and slave connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 31. Unipolar PWM output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 32. Typical LC filter for an 8-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 33. Typical LC filter for a 4-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 34. Filterless application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 35. Behavior of pin DIAG for various protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 36. Power derating curves for PCB used as heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 37. Test board (TDA7491LP) layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 38. PowerSSO-36 EPD outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
