TDA7492MV13TR STMicroelectronics, TDA7492MV13TR Datasheet

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Features 20 W continuous output power Ω, THD = 10 continuous output power Ω, THD = 10 Wide range single supply operation ( ...

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Contents Contents 1 Device block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7491MV List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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List of figures List of figures Figure 1. Internal block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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TDA7491MV 1 Device block diagram Figure 1 shows the block diagram of the TDA7491MV. Figure 1. Internal block diagram Doc ID 14576 Rev 2 Device block diagram 5/28 ...

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Pin description 2 Pin description 2.1 Pin out Figure 2. Pin connection (top view, PCB view) SUB_GND 6/ OUTN 11 OUTN 12 ...

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TDA7491MV 2.2 Pin list Table 2. Pin description list Number Name 1 SUB_GND 2,3 NC 4,5 NC 6,7 NC 8,9 NC 10,11 OUTN 12,13 PVCC 14,15 PGND 16,17 OUTP 18 PGND 19 VDDPW 20 STBY 21 MUTE 22 INP 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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TDA7491MV 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 Output power o P Dissipated power D η Efficiency THD Total harmonic distortion ...

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Electrical specifications Table 5. Electrical specifications (continued) Symbol Function Standby, mute and play modes mode (( with the frequency of the external oscillator. SW SYNCLK ...

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TDA7491MV 4 Characterization curves The following characterization curves were made using the TDA7491MV demo board. The LC filter for the 8-Ω load uses components of 33 µH and 220 nF. All other test conditions are given along side the corresponding ...

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Characterization curves Figure 5. THD vs output power (100 Hz) Test Condition: Vcc =18V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF, f =100Hz, Gv =30dB, Tamb =25℃ Figure 6. THD vs Frequency Test Condition: Vcc =18V, RL= 8 ohm, Rosc ...

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TDA7491MV Figure 8. FFT (0 dB) Test Condition: Vcc =18V, RL= 8 ohm, Rosc =39kΩ, Cosc =100nF 1kHz, Gv =30dB, Po =1W Tamb =25℃ Specification Limit: Typical: >60dB for the harmonic frequency Figure 9. FFT (-60 dB) Test ...

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Characterization curves Figure 11. Power dissipation and efficiency vs output power Test Condition : Vcc = 18V ohm, Rosc =39kO, Cosc =100nF, f =1kHz, Gv =30dB, Tamb =25℃ Figure 12. Attenuation vs mute voltage Test Condition : ...

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TDA7491MV Figure 14. Attenuation vs voltage on pin STBY Test Condition : Vcc = 5~18V ohm, Rosc =39k O , Cosc =100nF, 0dB@f=1kHz, Po=1w, Gv =30dB, Tamb =25℃ Figure 15. Power supply rejection ratio vs frequency Test ...

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Characterization curves 4.1 Test board Figure 16. Test board (TDA7491HV) layout 16/28 Doc ID 14576 Rev 2 TDA7491MV ...

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TDA7491MV 5 Package mechanical data The TDA7491MV comes in a 36-pin PowerSSO package with exposed pad down. Figure 17 below shows the package outline and Figure 17. PowerSSO-36 EPD outline drawing Table 6 gives the dimensions. Doc ID 14576 Rev ...

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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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TDA7491MV 6 Applications circuit Figure 18. Applications circuit for class-D amplifier Input settings for gain: GAIN0 : GAIN1 3 3.3 V 6.1 Compatibility ...

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Application information 7 Application information 7.1 Mode selection The three operating modes of the TDA7491MV 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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TDA7491MV 7.2 Gain setting The gain of the TDA7491MV 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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Application 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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TDA7491MV 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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Application 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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TDA7491MV 7.7 Protection function The TDA7491MV 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 8 the overvoltage protection is activated which forces ...

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Application 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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TDA7491MV 8 Revision history Table 10. Document revision history Date 21-Oct-2008 29-May-2009 Revision 1 Initial release. Updated text concerning oscillator R and C in Electrical specifications on page 8 Updated test condition for Iq, added V MUTE voltages and rectified ...

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