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FDA450LV
4 x 50 W PWM digital input power amplifier
with built-in diagnostics features and low voltage operation
Data brief - production data
 C-MOS compatible enable pin (3.3/5 V)
 ESD protection
 6 V operation (“Start - Stop”)
Description
'!0'03
TQFP100
(Exposed pad up)
The FDA450LV is a new BCD- SOI (silicon on
insulation) technology QUAD BRIDGE class D
amplifier, specially intended for car radio
applications.
Features
 Integrated 108 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
 MOSFET power outputs
 EMI control for FM/AM compatibility
 EMI compliance at the CEI EN 55025 (200910)
 Dithering possibility
 Very low external component count filter
 Output lowpass filter included in the feedback
 Low radiation function (LRF)
 Max. output power
– 4 x 50 W/4  @ 15.2 V, 1 kHz
 Full I2C bus driving (3.3/1.8 V):
– Independent front/rear soft play/ mute
– I2C bus diagnostics (including DC and AC
load detection, test signal internally
generated)
 Very flexible fault detection though integrated
diagnostic
 Offset detector (play or mute mode)
 Four independent short circuit protection
September 2013
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 of the inductor and
capacitor quality.
FDA450LV is fully configurable through I2C bus
interface and integrates a full diagnostics array
specially intended for automotive applications.
Thanks to the solutions implemented to solve the
EMI problems, the device is conceived to be used
in the standard single DIN car-radio box together
with the tuner.
 High output power capability
– 28 W/4  10 % THD, Vd = 14.4 V
 Clipping detector
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 possibility to parallelize the outputs allows to
drive both 2  and 1  speakers.
Moreover FDA450LV is able to work with power
supply as low as 6 V, thus supporting the most
recent low voltage ('start-stop') car-makers
specification.
Table 1. Device summary
Order code
Package
Packing
FDA450LV
TQFP100 (exp. pad up)
Tray
DocID025018 Rev 2
This is information on a product in full production. For further information contact your local STMicroelectronics sales
office.
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www.st.com
Contents
FDA450LV
Contents
1
Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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DocID025018 Rev 2
FDA450LV
Block diagram and pins description
Figure 1. Block diagram
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Figure 2. Pins connection diagram (top view)
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1
Block diagram and pins description
DocID025018 Rev 2
'!0'03
3/8
8
Block diagram and pins description
FDA450LV
Table 2. Pins list description
N#
Pin
1
N.C.
2
Gnd2-
3
Feedback2-
4
Out2-
Channel 2 half bridge a Output
5
Out2-
Channel 2 half bridge a Output
6
Vdd2-
Channel 2 half bridge a Power Supply
7
Vdd2+
Channel 2 half bridge b Power Supply
8
Out2+
Channel 2 half bridge b Output
9
Out2+
Channel 2 half bridge b Output
10
Not connected
Channel 2, half bridge a Power Ground
Channel 2 half bridge a Feedback
Feedback2+ Channel 2 half bridge b Feedback
11
Gnd2+
Channel 2, half bridge b Power Ground
12
Gnd1-
Channel 1, half bridge a Power Ground
13
Feedback1-
14
Out1-
Channel 1 half bridge a Output
15
Out1-
Channel 1 half bridge a Output
16
Vdd1-
Channel 1 half bridge a Power Supply
17
Vdd1+
Channel 1 half bridge b Power Supply
18
Out1+
Channel 1 half bridge b Output
Out1+
Channel 1 half bridge b Output
19
20
4/8
Function
Channel 1 half bridge a Feedback
Feedback1+ Channel 1 half bridge b Feedback
21
Gnd1+
Channel 1, half bridge b Power Ground
22
Gnd
Ground
23
N.C.
Not connected
24
Vbat
Power supply
25
TAB
-
26
GND
Ground
27
GND
Ground
28
GND
Ground
29
Enable 3
30
A-Vdd
Chip Enable 3
Analog Power Supply
31
D-Vdd
Digital Power Supply
32
A-Gnd
Analog Ground
33
An-P
Positive Analog Supply V(svr)+1.65 (Internally generated)
34
An-N
Negative Analog Supply V(svr)-1.65 (Internally generated)
35
SVR
Supply Voltage Ripple Rejection Capacitor
36
IsetProt
Current Protection Resistor Setting
37
ExtTher
External Thermal Protection Input
38
N.C.
Not connected
39
Dig-N
Negative Digital Supply V(svr)-1.65 (Internally generated)
DocID025018 Rev 2
FDA450LV
Block diagram and pins description
Table 2. Pins list description (continued)
N#
Pin
Function
40
Dig-P
Positive Digital Supply V(svr)+1.65 (Internally generated)
41
D-Gnd
Digital Ground
42
Mute
43
PLL_Filter
44
Enable 1
Chip Enable 1
45
Enable 2
Chip Enable 2
CD/DIAG
Clip detector and diagnostic output:
Overcurrent protection intervention
Thermal warning
Offset detection
46
Mute Input (10uA source current)
PLL Filter Network
47
N.C.
Not connected
48
I2C-Data
I2C Data Input
49
I2C-Clock
I2C Data Clock
50
I2S-Data1
I2S/TDM Data 1 Input
51
I2S Data 2
I2S/TDM Data 2 Input
52
I2S-Sinc
I2S/TDM Sinc Input
53
I2S-CLK
I2S/TDM Clock Input
54
N.C.
55
56
Gnd4+
Not connected
Channel 4, half bridge + Power Ground
Feedback4+ Channel 4 half bridge + Feedback
57
Out4+
Channel 4 half bridge + Output
58
Out4+
Channel 4 half bridge + Output
59
Vdd4+
Channel 4 half bridge + Power Supply
60
Vdd4-
Channel 4 half bridge - Power Supply
61
Out4-
Channel 4 half bridge - Output
62
Out4-
Channel 4 half bridge - Output
63
Feedback4-
64
Gnd4-
Channel 4, half bridge - Power Ground
65
Gnd3+
Channel 3, half bridge + Power Ground
66
Channel 4 half bridge - Feedback
Feedback3+ Channel 3 half bridge + Feedback
67
Out3+
Channel 3 half bridge + Output
68
Out3+
Channel 3 half bridge + Output
69
Vdd3+
Channel 3 half bridge + Power Supply
70
Vdd3-
Channel 3 half bridge - Power Supply
71
Ou3-
Channel 3 half bridge - Output
72
Out3-
Channel 3 half bridge - Output
73
Feedback3-
74
Gnd3-
Channel 3 half bridge - Feedback
Channel 3, half bridge - Power Ground
75
TAB
-
76 to 100
N.C.
Not connected
DocID025018 Rev 2
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8
Package information
2
FDA450LV
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 3. TQFP100 (exposed pad up) mechanical data and package dimensions
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'!0'03
6/8
DocID025018 Rev 2
FDA450LV
3
Revision history
Revision history
Table 3. Document revision history
Date
Revision
Changes
18-Jul-2013
1
Initial release.
18-Sep-2013
2
Updated Disclaimer.
DocID025018 Rev 2
7/8
8
FDA450LV
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