amplifier. FDA803U Datasheet

FDA803U Datasheet PDF


Part FDA803U
Description 1 x 45W class-D digital input automotive power amplifier
Feature FDA803U 1 x 45 W class D digital input automotive power amplifier with diagnostics, wide voltage op.
Manufacture STMicroelectronics
Datasheet
Download FDA803U Datasheet


FDA803U 1 x 45 W class D digital input automotive power amp FDA803U Datasheet




FDA803U
FDA803U
1 x 45 W class D digital input automotive power amplifier with diagnostics,
wide voltage operation range for car audio and telematic
Datasheet - production data
3RZHU662 6OXJXS
*$'*36
Features
AEC-Q100 qualified
Integrated 108 dB D/A conversion
I2S and TDM digital input (4/8/16CH TDM)
Input sampling frequency: 44.1 kHz, 48 kHz,
96 kHz, 192 kHz
Full I2C bus driving (3.3/1.8 V)
CISPR 25 - Class V (Fourth edition)
Very low quiescent current
Output lowpass filter included in the feedback
allowing outstanding audio performances
Wide operating supply range from 3.3 to 18 V,
suitable for car radio, telematics and e-call
MOSFET power outputs allowing high output
power capability
– 1 x 25 W /4 Ω @ 14.4 V, 1 kHz THD = 1%
– 1 x 30 W /4 Ω @ 14.4 V, 1 kHz THD = 10%
2 Ω loads driving
Power limiting function (configurable through I2C)
I2C bus diagnostics:
– Short to VCC/GND
– Short load and open load detection (also in
play mode)
– Four thermal warnings
DC offset detector (also in play) and 'hot spot'
detection
Clipping detector
Integrated thermal protection
Legacy mode ('no I2C' mode), 4 configurable
settings
Short circuit and ESD integrated protections
Package: PowerSSO-36 exposed pad up
Description
The FDA803U is a single bridge class D amplifier,
designed in the most advanced BCD technology,
intended for any automotive audio application (car
radio, telematics and e-call, noise and tone
generators, etc).
The FDA803U integrates a high performance D/A
converter together with powerful MOSFET
outputs in class D, so it is very compact and
powerful, moreover it reaches outstanding
efficiency performances (90%).
It has a very wide operating range: it can be
operated both with standard car battery levels
(5.5-18 V operating, compatible to load dump
pulse) and with external step-down generated
voltages or emergency battery (since it is
compatible to minimum 3.3 V operative).
The feedback loop includes the output L-C low-
pass filter, allowing superior frequency response
linearity and lower distortion.
FDA803U is configurable through I2C bus
interface and integrates a complete diagnostics
array specially intended for automotive
applications including innovative open load and
DC offset detection in play mode.
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 FDA803U features a configurable
power limiting function, and can be optionally
operated under no I2C mode ('legacy mode').
Table 1. Device summary
Order code
Package
Packing
FDA803U-KBT
FDA803U-KBX
PowerSSO-36
(Slug-up)
Tape & reel
Tube
July 2019
This is information on a product in full production.
DS12497 Rev 2
1/76
www.st.com



FDA803U
Contents
Contents
FDA803U
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Typical curves of the main electrical parameters . . . . . . . . . . . . . . . . . . . 16
5 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 LC filter design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Load possibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Finite state machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1 Device state and address selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2 Standby state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3 Diagnostic Vcc-Gnd state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.4 ECO-mode state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5 MUTE-PLAY and diagnostic states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6 Operation compatibility vs battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7 Muting function architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1 Command dependence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2 Analog-Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3 Digital-Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.4 Mixed mute advantages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Hardware mute pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9 Power limiter function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.1 Power limiter control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2/76 DS12497 Rev 2






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