特性 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

描述 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.