描述 Description

The FDA802S is a dual bridge class D amplifier, designed in the most advanced BCD technology specially intended for car radio applications.The FDA802S integrates a high performance D/A converter together with powerful MOSFET outputs in class D, to get an outstanding efficiency compared with the standard class AB.

The integrated D/A converter allows to reach outstanding performances (110 dB S/N ratio with 108 dB of dynamic range). Thanks to the high-voltage MOSFET output stages it can operate both under standard car battery (6-18 V) and under boosted power supply (up to 25 V) to reach the highest possible power with integrated solution. 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.

FDA802S is fully configurable through I2C bus interface and integrates a complete diagnostics array specially intended for automotive applications. Thanks to the solutions implemented to solve the EMI problems, the device is intended to be used in the standard single DIN car-radio box together with the tuner. Moreover the FDA802S is able to work with power supply as low as 5.5 V, thus supporting the most recent low voltage ('start-stop') car-makers specification.

特性 Features

? 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
? Full I2C bus driving (3.3/1.8 V) with 8 different I2C bus addresses
? Operating supply range: 5.5?V - 25?V
? EMI compliance evaluated following normative:
?CISPR25 Class V
?ISO 11452 2
? Low radiation function (LRF)
? Very low quiescent current
? Output lowpass filter is included in the feedback for outstanding audio performance
? Operation under standard car battery with high output power:
?2 x 22 W /4 Ω @ 14 V, 1 kHz THD = 1%
?2 x 28 W /4 Ω @ 14 V, 1 kHz THD = 10%
?2 x 37 W /2 Ω @ 14 V, 1 kHz THD = 1%
?2 x 46 W /2 Ω @ 14 V, 1 kHz THD = 10%
? Possibility to drive 2 Ω loads (up to 18 V)
? Parallel mode for 1 Ω loads (up to 18 V)
? I2C bus diagnostics:
?Short to VCC/GND diagnostic
?DC load diagnostic
?AC load diagnostic (working both with internally and externally generated tone)
? Integrated fault protection
? Input and output offset detector
? Clipping detector
? Short circuit and ESD integrated protections