TDA7498LTR STMicroelectronics, TDA7498LTR Datasheet

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... Short-circuit protection ■ Thermal overload protection ■ Externally synchronizable Table 1. Device summary Order code TDA7498L - °C TDA7498LTR - °C September 2011 = Description The TDA7498L is a dual BTL class-D audio amplifier with single power supply designed for home systems and active speaker applications. ...

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Contents Contents 1 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7498L List of figures Figure 1. Internal block diagram (showing one channel only ...

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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7498L 1 Device block diagram Figure 1 shows the block diagram of one of the two identical channels of the TDA7498L. Figure 1. Internal block diagram (showing one channel only) Doc ID 16504 Rev 3 Device block diagram 5/27 ...

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Pin description 2 Pin description 2.1 Pinout Figure 2. Pin connections (top view, PCB view) 6/27 36 VSS 35 SVCC 34 VREF 33 INNB 32 INPB 31 GAIN1 30 GAIN0 29 SVR 28 DIAG 27 SGND 26 VDDS 25 SYNCLK ...

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TDA7498L 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 ...

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Electrical specifications 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol V DC supply voltage for pins PVCCA, PVCCB CC_MAX Voltage limits for input pins STBY, MUTE, INNA, INPA, V L_MAX INNB, INPB, GAIN0, GAIN1 T ...

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TDA7498L 3.4 Electrical specifications Unless otherwise stated, the results in (load Ω Tamb = 25 °C. Table 6. Electrical specifications Symbol I Total quiescent current q I Quiescent current in ...

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Electrical specifications Table 6. Electrical specifications (continued) Symbol f Switching frequency SW Output switching frequency f SWR Range V Digital input high (H) inH V Digital input low (L) inL Pin STBY voltage high (H) V STBY Pin STBY voltage ...

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TDA7498L 4 Characterization curves Figure 20 on page 18 the next sections, were measured. 4.1 PCB layout Figure 3. Test board shows the test circuit with which the characterization curves, shown in Figure 3 below shows the PCB layout. Top ...

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Characterization curves 4.2 Characterization curves Unless otherwise stated the measurements were made under the following conditions kHz Ω 4.2.1 For R L Figure 4. Output power vs. supply voltage ...

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TDA7498L Figure 6. THD vs. output power (100 Hz) Figure 7. THD vs. frequency (1 W) Figure 8. THD vs. frequency (100 mW 0.5 0.2 0.1 % 0.05 0.02 0.01 0.005 0.002 0.001 100 m 200 ...

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Characterization curves Figure 9. Frequency response Figure 10. FFT performance (0 dBFS) Figure 11. FFT performance (-60 dBFS) 14/27 +3 +2.5 +2 +1 -0.5 -1 -1 100 200 ...

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TDA7498L = 8 Ω 4.2.2 For R L Figure 12. Output power vs. supply voltage Figure 13. THD vs. output power (1 kHz 0.5 0.2 0.1 % 0.05 0.02 0.01 0.005 0.002 0.001 100 m 200 ...

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Characterization curves Figure 14. THD vs. output power (100 Hz) % Figure 15. THD vs. frequency ( Figure 16. THD vs. frequency (100 mW) % 16/ 0.5 0.2 0.1 0.05 0.02 0.01 0.005 0.002 ...

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TDA7498L Figure 17. Frequency response Figure 18. FFT performance (0 dBFS) Figure 19. FFT performance (-60 dBFS) +3 +2.5 +2 +1 -0.5 -1 -1 100 200 500 Hz ...

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Applications information 5 Applications information 5.1 Applications circuit Figure 20. Applications circuit C1 1uF C2 1uF J1 INPUT SGND SGND SGND L- 3 For Single-Ended R- 1 Input R+ 2 SGND FREQUENCY SHIFT ...

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TDA7498L The protection functions of the TDA7498L are enabled by pulling down the voltages of the STBY and MUTE inputs shown in must be limited to 200 µA. Table 7. Mode settings Mode Standby Mute Play 1. Drive levels defined ...

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Applications information 5.3 Gain setting The gain of the TDA7498L 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 ...

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TDA7498L 5.5 Internal and external clocks The clock of the class-D amplifier can be generated internally or can be driven by an external source. If two or more class-D amplifiers are used in the same system recommended that ...

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Applications information 5.6 Output low-pass filter To avoid EMI problems, it may be necessary to use a low-pass filter before the speaker. The cutoff frequency should be larger than 22 kHz and much lower than the output switching frequency. It ...

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TDA7498L 5.7 Protection functions The TDA7498L 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 9 the overvoltage protection is activated which forces ...

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Package mechanical data 6 Package mechanical data The TDA7498L comes in a 36-pin PowerSSO package with exposed pad up. Figure 28 shows the package outline and Table 10. PowerSSO-36 EPU dimensions Symbol Min A 2. ...

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Figure 28. PowerSSO-36 EPU outline drawing h x 45° ...

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Revision history 7 Revision history Table 11. Document revision history Date 04-Dec-2009 02-Jul-2010 12-Sep-2011 26/27 Revision 1 Initial release. Removed datasheet preliminary status, updated features list and updated Device summary table Updated minimum supply voltage and temperature range in 2 ...

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... TDA7498L Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...