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TDA7572 Scheda tecnica(PDF) 7 Page - STMicroelectronics |
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TDA7572 Scheda tecnica(HTML) 7 Page - STMicroelectronics |
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7 / 64 page  TDA7572 Detailed features 7/64 1 Detailed features ● Input Stage and Gain Compressor – Differential, high CMRR, analog input – Programmable input attenuation/gain to support up to four drive levels – Noiseless Gain compression of up to 16 dB with programmable attack and decay. – Compressor controlled by monitoring estimated THD – Soft mute / un-mute for pop control ● Over-modulation Protection and Current Limiting – Adaptive pulse injection prevents missing pulses due to over modulation which maximizes useful output swing. – Programmable current limiting based on FET VDS ● Modulator – Optimized for low distortion at low switching frequency (approximation 110KHz) – Dual Clocked PWM modulators for 3 state switching – External gain control / internal integrator components – Controls 4 external FETS with switching optimized for low EMI – Oscillation frequency selectable by I2C – Anti-pop shunt driver ● DAC – 18bit, mono –I2S inputs 38-48KHz, 96KHz, 192 KHz – Hybrid architecture, area optimized for Bass – Full bandwidth supported by off loading the interpolator function – Synchronization with modulator ● Step-Up – On board STEP-UP step up converter, synchronized to the modulator frequency – Drives external NFET switch – Externally compensated – Soft start and current limiting ● Mode Control – Critical modes controllable by mode pins for bus-less operation –I2C provides additional mode control ● Diagnostics / Safety – Offset, short, open, overcurrent, over temperature –I2C used to report errors, and for configuration control – Faults pin used to report errors in bus-less environment – Clipping reported at a separate pin – Abnormal supply current detection disables input power for fail safe operation – Output current limiting – Power control – Latching control of an external PMOS power switch for safety related faults. – Power is switched off for safety related faults of abnormal supply current, excessive internal or external temperature, or persistent output stage over-current that fails to be controlled by the pulse-by-pulse current limiting method |
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