Features
 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, 192 kHz
 Class-D channels with 93% efficiency
 EMI control for AM compatibility
 EMI compliance evaluated following normative
IEC61967-4 and IEC62132-4
 Low radiation function (LRF)
 Idle tones free DAC
 Output lowpass filter included in the feedback
allowing lower cost filter components
 Max. output power
– 4 x 50 W/4 Ω @ 15.2 V, 1 kHz
 High output power capability
– 28 W/4 Ω 10 % THD, Vd = 14.4 V
 Full I2C bus driving (3.3/1.8 V):
– Channels independent tristate
– Channel independent soft play/mute
– I2C bus diagnostics , including DC and AC
load detection and load value recognition
(DIM)
 Integrated fault protection
 Input and output offset detector
 Clipping detector
 ESD protection
 6 V operation (“Start - Stop” engines
compatibility)
 2 and 1 Ω load driving capability

Description
FDA801B is a new BCD technology quad
BRIDGE class D amplifier, specially intended for
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 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). 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.
FDA801B is fully configurable through I2C bus
interface and integrates a full diagnostics array
specially intended for automotive applications.
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 FDA801B is able to work with power
supply as low as 6 V, thus supporting the most
recent low voltage ('start-stop') car-makers
specification.