FDA901-VYY [STMicroelectronics]

FDA901 is a new BCD technology Quad Bridge class D amplifier, specially intended for car radio automotive applications.

Thanks to the technology used, it is possible to integrate a high performance D/A converter together with powerful MOSFET outputs in class D, to get an outstanding efficiency compared to the standard class AB.

The integrated D/A converter allows to reach outstanding performances (115 dB S/N ratio with 110 dB of dynamic range). The feedback loop includes the output L-C low-pass filter, allowing superior frequency response linearity and lower distortion independently from the inductor and capacitor quality.

FDA901 is fully configurable through I²C bus, moreover it includes not only the most complete load diagnostic matrix but also a unique real time load current acquisition on I²C and I²S data lines, enabling sophisticated speaker monitoring functions.

Thanks to the solutions implemented to contain EMI emissions, the device is intended to be used in the standard single DIN car-radio box together with the tuner.

Moreover the FDA901 is able to work with power supply as low as 6 V, thus supporting the most recent low voltage ('start-stop') car-makers specification.

• AEC-Q100 qualified
• Integrated 110 dB D/A conversion
• I²S and TDM digital input (3.3/1.8 V)
• Input sampling frequency: 44.1 kHz, 48 kHz, 96 kHz and 192 kHz
• Class-D channels with 93% efficiency
• CISPR25 - Class V (Fourth Edition)
• Low radiation function (LRF)
• Idle tones free DAC
• Output lowpass filter included in the feedback allowing superior audio performance
• High output power capability
  • 28 W/4 Ω 10% THD, V_d = 14.4 V
  • Max. output power: 4 x 50 W/4 Ω @ 15.2 V, 1 kHz
• Full I²C bus driving (3.3/1.8 V):
  • Channel independent Eco-Mode
  • Channel independent soft play/mute
  • I²C bus diagnostics, including DC and AC load detection and load value recognition
• Integrated fault protection
• Input and output offset detector
• Clipping detector
• Real time load current monitoring (on I²C and TDM data lines)
  
• ESD protection
• 6 V operation (Start - Stop engines compatibility)
• 2 and 1 Ω load driving capability