TDA7572 Datasheet, PDF (7/64 Pages) STMicroelectronics – 200W mono bridge PWM amplifier with built-in step-up converter

TDA7572
Detailed features
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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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