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FDA2100LV
2 x 180 W / 1 x 300 W PWM digital input power amplifier
with built-in diagnostics features and step-up driver
Data brief - production data
Description
The FDA2100LV is a new BCD technology dual
bridge class D amplifier, specially intended for car
radio applications.
*$*36
TQFP64 (exposed pad up)
Features
 Integrated 105 dB D/A conversion
 I2S & TDM digital input (3.3/1.8 V)
 Input sampling frequency: 44.1kHz, 48 kHz,
96 kHz, 192 kHz
 Step-up driver included
 EMI control for FM/AM compatibility
 Dithering possibility
 Capable to operate down to 6 V (e.g."start-stop")
 6 V - 35 V operating range (RL = 8 Ω)
 Low component count output low-pass filter
 Output low-pass filter included in the feedback
 Low radiation function (LRF)
 High output power capability
– 2 x 80 W/4 Ω @ 25 V, 1 kHz, 10 % THD
– 2 x 120 W/4 Ω @ 30 V, 1 kHz, 10 % THD
– 1 x 150 W/2 Ω @ 25 V, 1 kHz, 10 % THD
 Full I2C bus driving (3.3/1.8 V):
– I2C bus digital diagnostics (including DC
and AC load detection); AC and DC
loudspeaker diagnostic
 Very flexible fault detection through integrated
diagnostic
 Protected against several kinds of
misconnections
 Offset detector (play or mute mode)
 Two independent short circuit protections
 Clipping detector
 C-MOS compatible enable pin (3.3/5 V)
 ESD protection
 Package: TQFP64 exposed pad up
October 2013
Thanks to the BCD6-SOI (Silicon On Insulation)
technology it is possible to integrate a high
performance D/A converter together with powerful
MOSFET output amplifier working in class D, to
get outstanding efficiency with respect to the
standard class AB.
The D/A conversion on board allows the
performance to reach an outstanding 110 dB S/N
ratio with 105 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.
A full diagnostics array communicates the status
of each speaker through the I2C bus. The
possibility to control the device by means of the
I2C bus makes FDA2100LV very flexible.
Thanks to the solutions implemented to solve the
EMI problems, the device can be used in the
standard single DIN car-radio box together with
the tuner.
A built-in step-up driver allows up to 150 W output
power with the standard 14 V supply voltage.
The FDA2100LV is moreover compliant to the
most recent OEM specifications for low voltage
operation (so called 'start-stop' battery profile
during engine stop), helping car manufacturers to
reduce the overall emissions and thus
contributing to environment protection.
Table 1. Device summary
Order code
FDA2100LV
FDA2100LV-T
Package
TQFP64 (e.p.u.)
DocID025342 Rev 1
This is information on a product in full production. For further information contact your local STMicroelectronics sales
office.
Packing
Tray
Tape & reel
1/9
www.st.com
Contents
FDA2100LV
Contents
1
Block diagram and pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2/9
DocID025342 Rev 1
FDA2100LV
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
*$3*36
3/9
9
Block diagram and pins description
FDA2100LV
Table 2. Pins list description
Pin #
Pin name
64
N.C.
63
Gnd1-
51-62
N.C.
50
Gnd2-
49
TAB
48
Feedback2-
47
Out2-
Channel 2 half bridge output -
46
Out2-
Channel 2 half bridge output -
45
Vdd2-
Channel 2 half bridge power supply -
44
Vdd2+
Channel 2 half bridge power supply +
43
Out2+
Channel 2 half bridge output +
42
Out2+
Channel 2 half bridge output +
41
Feedback2+
40
Gnd2+
39
N.C.
38
I2S-Clock
I2S/TDM clock Input
37
I2S-Sinc
I2S/TDM sinc Input
36
I2S-Data
I2S/TDM data Input
35
Test
Test pin (do not use)
34
I2C-Clock
I2C data Clock
33
I2C-Data
I2C data input
32
CD/DIAG
Clip detector and diagnostic output: over-current protection, thermal warning, offset
detection
31
Enable 2
Chip enable 2
30
Enable 1
Chip enable 1
29
PLL_Filter
28
Mute
27
D-Gnd
Digital ground
26
Dig-P
Positive digital supply V(svr)+1.65 (internally generated)
25
Dig-N
Negative digital supply V(svr)-1.65 (internally generated)
24
ExtTher
External thermal protection input
23
IsetProt
Current protection resistor setting
22
SVR
Supply voltage ripple rejection capacitor
21
An-N
Negative analog supply V(svr)-1.65 (internally generated)
20
An-P
Positive analog supply V(svr)+1.65 (internally generated)
4/9
Function
Not connected
Channel 1, half bridge power ground Not connected
Channel 2, half bridge power ground TAB connection
Channel 2 half bridge feedback -
Channel 2 half bridge feedback +
Channel 2, half bridge power ground +
Not connected
PLL filter network
Mute input (6 μA source current)
DocID025342 Rev 1
FDA2100LV
Block diagram and pins description
Table 2. Pins list description (continued)
Pin #
Pin name
Function
19
A-Gnd
Analog ground
18
D-Vdd
Digital power supply
17
A-Vdd
Analog power supply
16
Enable 3
15
I2
Step-up current limiting reference
14
I1
Step-up current limiting input
13
Comp
Step-up compensation input
12
Vbat
11
Gate-driver
10
SU-Gnd
Step-up power ground
9
Gnd1+
Channel 1, half bridge power ground +
8
Feedback1+
7
Out1+
Channel 1 half bridge output +
6
Out1+
Channel 1 half bridge output +
5
Vdd1+
Channel 1 half bridge power supply +
4
Vdd1-
Channel 1 half bridge power supply -
3
Out1-
Channel 1 half bridge output -
2
Out1-
Channel 1 half bridge output -
1
Feedback1-
Chip enable 3
Power supply (battery)
External PowerMOS gate drive output
Channel 1 half bridge feedback +
Channel 1 half bridge feedback -
DocID025342 Rev 1
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Device overview
2
FDA2100LV
Device overview
The FDA2100LV is a fully digital single chip class D amplifier with high immunity to the
demodulation filter effects, built-in diagnostic functions and step-up driver. The high
integration level and the on-board signal processing allow an excellent audio performance
to be achieved. Thanks to the digital input and a feedback strategy in the power stage that
make the amplifier robust with respect to the output filter non-idealities, the number and size
of the external components are minimized.
Differently from the typical PWM switching amplifiers, a new feedback technique is adopted
by FDA2100LV. The LC filter is included in the feedback loop making the amplifier highly
insensitive to the characteristics of such a demodulator group. This solution optimizes the
system performance in terms of THD and frequency response. Regardless of the big phase
shifting introduced by the output filter the device shows a great phase margin for any load
condition.
A number of features has also been included to reduce EMI, making the system compliant
with the stringent limits typical of automotive applications and the fully digital approach
provides a strong GSM immunity.
The FDA2100LV includes digital I2C and I2S interfaces, internal 20 bits DAC conversion,
digital signal processing for interpolation and noise shaping, step-up driver, internal PLL for
a pure clock generation and self diagnostic functions and automatic detection of wrong load
connections or variation of the load with respect to the expected one.
In particular, considering diagnostic feature, the FDA amplifiers family provides different
functions to detect several possible fault conditions. Any warning information will be stored
in the I2C interface and kept until the first I2C bus reading operation. The main FDA2100LV's
diagnostic features are the following ones:

Load detection

Under/over voltage evens

Chip over temperature

Digital input offset

Output clipping

Over temperature of an external component (i.e. step-up DMOS) through a suitable
NTC external sensor

Output current digital acquisition
6/9
DocID025342 Rev 1
FDA2100LV
3
Package information
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. TQFP64 (exposed pad up) mechanical data and package dimensions
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DocID025342 Rev 1
7/9
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Revision history
4
FDA2100LV
Revision history
Table 3. Document revision history
8/9
Date
Revision
11-Oct-2013
1
Changes
Initial release.
DocID025342 Rev 1
FDA2100LV
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