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November 2015

DocID028632 Rev 1

1/11

FDA801B

4 x 50 W class-D digital input power amplifier with I2C diagnostics,

digital impedance meter (DIM) and low voltage operation

Data brief

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.

LQFP64 (exposed pad up)

Table 1. Device summary

Order code

Package

Packing

FDA801B-VYY LQFP64 (exp. pad up)

Tray

FDA801B-VYT LQFP64 (exp. pad up) Tape & Reel

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