TDA7491P13TR STMicroelectronics, TDA7491P13TR Datasheet
TDA7491P13TR
Specifications of TDA7491P13TR
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TDA7491P13TR Summary of contents
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... Standby and mute features Short-circuit protection Thermal overload protection Externally synchronizable Table 1. Device summary Order code Operating temperature TDA7491P °C TDA7491P13TR °C September 2009 dual BTL class-D audio amplifier = Description The TDA7491P is a dual BTL class-D audio amplifier with single power supply designed for LCD TVs and monitors ...
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Contents Contents 1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7491P 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of tables List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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TDA7491P List of figures Figure 1. Internal block diagram (one channel only ...
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List of figures Figure 49. Applications circuit for class-D amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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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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Pin description 2 Pin description 2.1 Pin out Figure 2. Pin connection (top view, PCB view) SUB_GND OUTPB OUTPB PGNDB PGNDB PVCCB PVCCB OUTNB OUTNB OUTNA OUTNA PVCCA PVCCA PGNDA PGNDA OUTPA OUTPA 8/ ...
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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 ...
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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, SVCC CC T Operating temperature op T Junction temperature j T Storage temperature stg 3.2 Thermal data ...
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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 ...
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Characterization curves 4 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 ...
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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, ...
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Characterization curves Figure 8. FFT (0 dB) Test Condition: Vcc =10V, RL= 4 ohm, Rosc = 39kΩ, Cosc =100nF, f =1kHz 30dB Tamb = 25℃ Specification Limit: Typical: >60dB for the harmonic frequency Figure 9. ...
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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 ...
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Characterization curves Figure 14. Attenuation vs voltage on pin MUTE Test Condition: Vcc =10V, RL= 4 ohm, Rosc = 39kΩ, Cosc = 100nF, 0dB@f=1kHz,Po=1w, Gv=30dB, Tamb=25℃ Figure 15. Current consumption vs voltage on pin STBY Test Condition: Vcc =10V, RL= ...
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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: ...
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Characterization curves Figure 19. THD vs output power (100 Hz) Test Condition: Vcc =11V ohm, Rosc =39kΩ, Cosc =100nF, f =100Hz, Gv =30dB, Tamb =25℃ Specification Limit: Typical: 10W @ THD =10% Figure 20. THD vs frequency ...
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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 ...
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Characterization curves Figure 25. Power supply rejection ratio vs frequency Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF, Vin=0, Gv =30dB, 0dB refers to 500mV, 100Hz, Tamb =25℃ Figure 26. Power dissipation and efficiency vs output power ...
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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 ...
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Characterization curves Figure 31. Attenuation vs voltage on pin STBY Test Condition: Vcc =11V, RL= 6 ohm, Rosc =39kΩ, Cosc =100nF, f=1kHz, 0dB@f=1kHz, Po=1w, Gv =30dB, Tamb =25℃ 4.3 With 8-Ω load at V Figure 32. Output power vs supply ...
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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 ...
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Characterization curves Figure 36. Frequency response Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f =1kHz, Gv =30dB, Po =1W Tamb =25℃ Specification Limit: Max: +/-3dB @20Hz to 20kHz Figure 37. Crosstalk vs frequency Test Condition: Vcc ...
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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. ...
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Characterization curves Figure 42. Closed-loop gain vs frequency Test Condition: Vcc =12V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f =1kHz, 0dB@f=1kHz,Po=1W, Gain=32dB, Tamb =25℃ Figure 43. Current consumption vs voltage on pin MUTE Test Condition: Vcc =12V, RL= 8 ...
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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 ...
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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 ...
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Package mechanical data Table 6. PowerSSO-36 EPD dimensions Symbol Min A 2.15 A2 2.15 a1 0.00 b 0.18 c 0.23 D 10. 10. 0.60 ...
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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 ...
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Applications information 7 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 ...
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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 ...
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Applications information 7.4 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 ...
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TDA7491P 7.5 Filterless modulation The output modulation scheme of the BTL is called unipolar pulse width modulation (PWM). The differential output voltages change between 0 V and +V This is in contrast to the traditional bipolar PWM outputs which change ...
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Applications information 7.6 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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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 ...
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Applications information 7.9 Heatsink requirements A thermal resistance of 24 °C/W can be obtained using the PCB copper ground layer with 16 vias connecting it to the contact area for the exposed pad. Ensure that the copper ground area is ...
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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, ...
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