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November 2015 DocID028631 Rev 1 1/11
FDA801
4 x 50 W class-D digital input power amplifier with I
2
C diagnostics
and low voltage operation
Data brief
Features
Integrated 110 dB D/A conversion
I
2
S 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 I
2
C bus driving (3.3/1.8 V):
– Channels independent tristate
– Channel independent soft play/mute
–I
2
C bus diagnostics, including DC and AC
load detection
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
FDA801 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.
FDA801 is fully configurable through I
2
C 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 FDA801 is able to work with power
supply as low as 6 V, thus supporting the most
recent low voltage ('start-stop') car-makers
specification.
*$*36
LQFP64 (exposed pad up)
Table 1. Device summary
Order code Package Packing
FDA801-VYY LQFP64 (exp. pad up) Tray
FDA801-VYT LQFP64 (exp. pad up) Tape & Reel
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