TDA7492 ,50 W + 50 W dual BTL class-D audio amplifierblock diagram (showing one channel only) . . . . . . . 6Figure 2. Pin connections (top view, PCB ..
TDA7492MV ,50W Mono BTL class-D audio amplifierblock diagram . . . . . 5Figure 2. Pin connection (top view, PCB view) . . 6Figure 3. Ou ..
TDA7492P ,25 W + 25 W dual BTL class-D audio amplifierApplications information . . . . 186.1 Mode selection . . . . . 186.2 Gain setting ..
TDA7492P13TR ,25 W + 25 W dual BTL class-D audio amplifierblock diagram (showing one channel only) . . . . . . . 5Figure 2. Pin connections (top view, PCB ..
TDA7493 ,3 W + 3 W dual BTL class-D audio amplifierblock diagram (only one of two channels shown) 5Figure 2. Pin connection (top view) . . . ..
TDA7494 ,10W AMPLIFIER WITH DC VOLUME CONTROLABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitV DC Supply Voltage 35 VSV Maximum Input Voltage ..
THS3202DGNR ,2GHz Current Feedback AmplifierFEATURES DESCRIPTION23• Unity-Gain Bandwidth: 2 GHzThe THS3202 is a dual current-feedback amplifier ..
THS4001CD ,270-MHz Voltage-Feedback Amplifiermaximum ratings over operating free-air temperature (unless otherwise noted)Supply voltage, V to V ..
THS4001ID ,270-MHz Voltage-Feedback AmplifierTHS4001270-MHz HIGH-SPEED AMPLIFIERSLOS206A– DECEMBER 1997 – REVISED MARCH 1999D PACKAGE* Very High ..
THS4011CD ,290-MHz Low-Distortion Voltage-Feedback AmplifierThese devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
THS4011CDG4 ,290-MHz Low-Distortion Voltage-Feedback Amplifier 8-SOIC .(2) The D and DGN packages are available taped and reeled. Add an R suffix to the device type (i.e ..
THS4011CDGN ,290-MHz Low-Distortion Voltage-Feedback AmplifierFEATURESTHS4011 THS4012†2• High Speed D, DGN, OR JG PACKAGE D OR DGN PACKAGE(TOP VIEW) (TOP VIEW)– ..
TDA7492
50 W + 50 W dual BTL class-D audio amplifier
September 2011 Doc ID 14926 Rev 5 1/32
TDA749250 W + 50 W dual BTL class-D audio amplifier
Features 50 W + 50 W continuous output power at
THD = 10% with RL = 6 Ω and VCC = 25 V 40 W + 40 W continuous output power at
THD = 10% with RL = 8 Ω and VCC = 25 V Wide-range single-supply operation (8 - 26 V) High efficiency (η = 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
DescriptionThe TDA7492 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-up
(EPU) package only a simple heatsink is required.
Table 1. Device summary
Contents TDA74922/32 Doc ID 14926 Rev 5
Contents Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72.1 Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Characterization curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114.1 Characterizations for 6-Ω loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Characterizations for 8-Ω loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Characterizations for 4-Ω loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.4 T est board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Applications circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236.1 Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2 Gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.3 Input resistance and capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.4 Internal and external clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4.1 Master mode (internal clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4.2 Slave mode (external clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5 Output low-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6 Protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.7 Diagnostic output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.8 Heatsink requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
TDA7492 Contents
Doc ID 14926 Rev 5 3/32
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
List of tables TDA7492
4/32 Doc ID 14926 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 7. Gain settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 8. How to set up SYNCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 9. PowerSSO-36 EPU dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 10. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TDA7492 List of figures
Doc ID 14926 Rev 5 5/32
List of figures
Figure 1. Internal block diagram (showing one channel only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connections (top view, PCB view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 4. THD vs. output power (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 5. THD vs. output power (100 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 6. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 7. Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 8. Crosstalk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9. FFT performance (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10. FFT performance (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12. THD vs. output power (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 13. THD vs. output (100 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 14. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 15. Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 16. Crosstalk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 17. FFT performance (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 18. FFT performance (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 19. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 20. THD vs. output power (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 21. THD vs. output (100 Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 22. THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 23. Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 24. Crosstalk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 25. FFT performance (0 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 26. FFT performance (-60 dB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 27. Test board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 28. Applications circuit for class-D amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 29. Standby and mute circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 30. Turn on/off sequence for minimizing speaker “pop” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 31. Device input circuit and frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 32. Master and slave connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 33. Typical LC filter for a 8-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 34. Typical LC filter for a 4-Ω speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 35. Behavior of pin DIAG for various protection conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 36. PowerSSO-36 EPU outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Device block diagram TDA7492
6/32 Doc ID 14926 Rev 5 Device block diagram
Figure 1 shows the block diagram of one of the two identical channels of the TDA7492.
Figure 1. Internal block diagram (showing one channel only)
TDA7492 Pin description
Doc ID 14926 Rev 5 7/32
2 Pin description
2.1 Pinout
Figure 2. Pin connections (top view, PCB view)
Pin description TDA7492
8/32 Doc ID 14926 Rev 5
2.2 Pin list
Table 2. Pin description list
TDA7492 Electrical specifications
Doc ID 14926 Rev 5 9/32
3 Electrical specifications
3.1 Absolute maximum ratings
3.2 Thermal data
3.3 Electrical specifications
Unless otherwise stated, the results in Table 5 below are given for the conditions:
VCC =25V , RL (load) = 8 Ω, ROSC = R3 = 39 kΩ, C8 = 100 nF , f = 1 kHz, GV = 21.6 dB and amb= 25 °C.
Table 3. Absolute maximum ratings
Table 4. Thermal data
Table 5. Electrical specifications
Electrical specifications TDA7492
10/32 Doc ID 14926 Rev 5 fSW = 106 / ((16 * ROSC + 182) * 4) kHz, fSYNCLK = 2 * fSW with R3 = 39 kΩ (see Figure 28.). fSW = fSYNCLK / 2 with the frequency of the external oscillator.
Table 5. Electrical specifications (continued)
TDA7492 Characterization curves
Doc ID 14926 Rev 5 11/32
4 Characterization curves
The general test conditions used for producing the characterization curves can be
summarized as follows: est board: SZ LAB TDA7492 slug-up demo board est frequency: 1 kHz (also 100 Hz for THD vs. output power only)
Output power: 1 W For 6-Ω loads test voltage: 25 V LC filter: L = 22 µH and C = 220 nF For 8-Ω loads test voltage: 25 V LC filter: L = 33 µH and C = 220 nF For 4-Ω loads test voltage: 20 V LC filter: L = 15 µH and C = 470 nF.
Figure 28 on page 22 shows the circuit with which the characterization curves, shown in the
next sections, were measured. Figure 27 on page 21 shows the PCB layout.
4.1 Characterizations for 6-Ω loads
Figure 3. Output power vs. supply voltage
Characterization curves TDA7492
12/32 Doc ID 14926 Rev 5
Figure 4. THD vs. output power (1 kHz)
Figure 5. THD vs. output power (100 Hz)
TDA7492 Characterization curves
Doc ID 14926 Rev 5 13/32
Figure 6. THD vs. frequency
Figure 7. Frequency response
Figure 8. Crosstalk
Characterization curves TDA7492
14/32 Doc ID 14926 Rev 5
Figure 9. FFT performance (0 dB)
Figure 10. FFT performance (-60 dB)
TDA7492 Characterization curves
Doc ID 14926 Rev 5 15/32
4.2 Characterizations for 8-Ω loads
Figure 11. Output power vs. supply voltage
Figure 12. THD vs. output power (1 kHz)
Characterization curves TDA7492
16/32 Doc ID 14926 Rev 5
Figure 13. THD vs. output (100 Hz)
Figure 14. THD vs. frequency
Figure 15. Frequency response
