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UTC TDA2030A LINEAR INTEGRATED CIRCUIT
18W HI-FI AUDIO AMPLIFIER AND
35W DRIVER
DESCRIPTION
The UTC TDA2030A is a monolithic IC in Pentawatt
package intended for use as low frequency class AB
amplifier.
With Vs=max=44V it is particularly suited for more reliable
applications without regulated supply and for 35W driver
circuits using low-cost complementary pairs.
The UTC TDA2030A provides high output current and has
very low harmonic and cross-over distortion.
Further the device incorporates a short circuit protection
system comprising and arrangement for automatically limiting
the dissipated power so as to keep the working point of the
output transistors within their safe operating area. A
conventional thermal shut-down system is also included.
1
TO-220B
PIN CONFIGURATIONS
1
2
3
4
5
Non inverting input
Inverting input
-VS
Output
+VS
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
Input Voltage
Differential Input Voltage
Peak Output Current(internally limited)
Total Power Dissipation at Tcase=90°C
Storage Temperature
Junction Temperature
Vs
Vi
Vdi
Io
Ptot
Tstg
Tj
±22
Vs
±15
3.5
20
-40 ~ +150
-40 ~ +150
V
V
V
A
W
°C
°C
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Vs =±16V,Ta=25°C)
PARAMETER
SYMBOL
Supply Voltage
Quiescent Drain
Current
Input Bias Current
Input Offset Voltage
Input Offset Current
Vs
Id
UTC
Ib
Vos
Ios
TEST CONDITIONS
MIN
TYP
MAX
UNIT
50
±22
80
V
mA
0.2
±2
±20
2
±20
±200
µA
mV
nA
±6
Vs=±22V
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
PARAMETER
Output Power
Power Bandwidth
Slew rate
Open loop voltage
Gain
Closed Loop
Voltage Gain
Total harmonic
distortion
Second Order CCIF
Intermodulation
distortion
Third Order CCIF
Intermodulation
Distortion
Input Noise Voltage
Input Noise Current
Signal to Noise
Ratio
Input Resistance
(pin 1)
Supply Voltage
Rejection
Thermal
Shut-Down
Junction
Temperature
UTC
SYMBOL
TEST CONDITIONS
MIN
TYP
Po
d=0.5%,Gv=26dB,f=40 to 15kHz
RL=4Ω
RL=8Ω
Vs=+-19V, RL=8Ω
Po=15W,RL=4Ω
15
10
13
18
12
16
100
8
80
BW
SR
Gvo
f=1kHz
Gvc
d
d2
25.5
Po=0.1 to 14W, RL=4Ω
f=40 to 15kHz
Po=0.1 to 14W,RL=4Ω
f=1kHz
Po=0.1 to 9W,RL=8Ω
f=40 to 15 kHz
Po=4W ,RL=4Ω
f2-f1=1 kHz
d3
f1=14 kHz, f2=15kHz
eN
B=curve A
B= 22Hz to 22kHz
B=curve A
B= 22Hz to 22kHz
RL=4Ω, Rg=10kΩ, B=curve A
Po=15W
Po=1W
Open loop,f=1kHz
iN
S/N
Ri
SVR
Tj
RL=4Ω,Gv=26dB
Rg=22kΩ,f=100Hz
26
UNIT
W
KHz
V/µ sec
dB
26.5
dB
0.08
%
0.03
%
0.5
%
0.03
%
0.08
%
2
3
50
80
0.5
MAX
µV
10
pA
200
106
94
5
dB
dB
MΩ
54
dB
145
°C
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION
+Vs
Vi
C1
1 µF
C5
100nF
C3
100µF
D1
1N4001
1
R3
22kΩ
5
UTC
TDA2030A
2
4
3
R1
22kΩ
R3
680Ω
C2
22 µF
R5
C6
100 µF
C8
R4
1Ω
D1
1N4001
RL
C4
C7
100nF 220nF
-Vs
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
+Vs
C5
220 µF
C1
1 µF
Vi
C3
100nF
D1
1N4001
1
R3
22kΩ
5
UTC
TDA2030A
2
4
3
R4
1Ω
R1
13kΩ
R3
680Ω
RL
D1
1N4001
C2
22 µF
C4
C7
100nF 220nF
C6
100 µF
-Vs
+Vs
220 µF
0.1 µF
1N4001
1
22 µF
5
UTC
TDA2030A
2
3
100kΩ
C
R
4
R4
1Ω
100kΩ
4.7kΩ
2.2 µF
1N4001
C7
220nF
2200 µF
100kΩ
RL=4Ω
Vi
100kΩ
2.2 µF
Fig.1 Single supply amplifier
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Fig.3 Output power vs. Supply
voltage
140
Gv
(dB)
180
Phase
100
90
60
0
Phase
Fig.2 Open loop frequency
response
Po
(W)
24
Gv=26dB
d=0.5%
f=40 to 15kHz
20
RL=4Ω
16
RL=8Ω
Gain
20
12
-20
8
-60
1
10
2
10
3
10
4
10
5
10
6
10
4
7
10
24
Frequency (Hz)
Fig.4 Total harmonic distortion
vs. output power
d
(%)
d
(%)
40
44
Vs (V)
Po (W)
2
10
Vs=32V
Po=4W
RL=4Ω
Gv=26dB
0
10
Vs=38V
RL=8Ω
f=15kHz
-1
10
36
1
10
Gv=26dB
0
10
32
Fig.5 Two tone CCIF
intermodulation distortion
2
10
1
10
28
Order (2f1-f2)
-1
10
Vs=32V
RL=4Ω
Order (2f2-f1)
f=1kHz
-2
10
-2
10
-1
10
0
10
1
10
Po (W)
2
10
-2
10
1
10
30
Vs=+-15V
RL=8Ω
25
3
10
4
10
5
10
Frequency (Hz)
Fig.7 Maximum allowable power
dissipation vs. ambient
temperture
Fig.6 Large signal frequency
response
Vo
(Vp-p)
2
10
30
Ptot
(W)
25
Vs=+-15V
RL=4Ω
20
20
15
10
10
5
1
10
UTC
2
10
3
10
Frequency (kHz)
4
10
he
a
Rt tsin
h= k
4° ha
C/ vin
he
W g
at
Rt sink
h=
h
8°C avin
/W g
ink
a ts
he
te
ini
g
inf
vin
ha
/W
ink
ats 5°C
he ty=2
R
15
5
-50
0
50
100
150
200
Tamb (°C)
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
UTC
TDA2030A
R4
3.3kΩ
C4
10 µF
C8
2200 µF
4
3
R5
30kΩ
BD907
R8
1Ω
RL=4Ω
C2
22 µF
5
2
R2
56kΩ
BD908
1N4001
1
R3
56kΩ
C5
220 µF
/40V
R6
1.5Ω
1N4001
R1
56kΩ
C6
0.22 µF
Vi
C1
2.2 µF
C3
0.22 µF
+Vs
R7
1.5Ω
C7
0.22 µF
Fig. 8 Single supply high power amplifier(UTC TDA2030+BD908/BD907)
TYPICAL PERFORMANCE OF THE CIRCUIT OF FIG. 8
PARAMETER
Supply Voltage
Quiescent Drain
Current
Output Power
SYMBOL
Vs
Id
Po
Voltage Gain
Slew Rate
Total Harmonic
Distortion
Input Sensitivity
Gv
SR
d
Signal to Noise
Ratio
S/N
UTC
Vi
TEST CONDITIONS
MIN
Vs=36V
d=0.5%,RL=4Ω
f=40Hz to 15kHz,Vs=39V
d=0.5%,RL=4Ω
f=40Hz to 15kHz,Vs=36V
d=0.5%,f=1kHz,
RL=4Ω,Vs=39V
d=0.5%,RL=4Ω
f=1kHz,Vs=36V
f=1kHz
Po=20W,f=1kHz
Po=20W,f=40Hz to 15kHz
Gv=20dB,Po=20W,
f=1kHz,RL=4Ω
RL=4Ω,Rg=10kΩ
B=curve A,Po=25W
RL=4Ω,Rg=10kΩ
B=curve A,Po=25W
TYP
MAX
UNIT
36
50
44
V
mA
35
28
W
44
35
19.5
20
8
0.02
0.05
890
20.5
dB
V/µsec
%
%
mV
108
100
dB
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Fig. 10 Output power vs. supply
voltage
Fig. 11 Total harmonic distortion
vs. output power
Po
(W)
d
(%)
Vs=36V
RL=4Ω
Gv=20dB
45
0
10
35
25
-1
10
f=15kHz
15
f=1kHz
5
24
28
32
34
36
Vs
(V)
40
-2
10
-1
10
Fig. 12 Output power vs.
Input level
0
10
1
10
Po
(W)
Fig. 13 Power dissipation vs.
output power
Ptot
(W)
Po
(W)
20
20
Complete
Amplifier
Gv=26dB
15
15
Gv=20dB
10
BD908/
BD907
10
5
UTC
TDA2030A
5
0
100
250
UTC
400
550
700
Vi
(mV)
0
0
8
16
24
32
UNISONIC TECHNOLOGIES CO., LTD.
Po
(W)
7
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
+Vs
Vi
C5
100 µF
C1
1 µF
C3
100nF
D1
1N4001
1
R3
22kΩ
5
UTC
TDA2030A
2
4
3
C8
R5
R4
1Ω
D2
R1
22kΩ 1N4001
R3
680Ω
C2
22 µF
C6
100 µF
RL
C4
C7
100nF 220nF
-Vs
Fig. 14 Typical amplifier with split power supply
Vs+
C6
100 µF
1
R1
22kΩ
2
5
UTC
TDA2030A
3
4
C8
IN
R3
22kΩ
0.22 µF
C1
220 µF
C7
100nF
R8
1Ω
C4
22 µF
RL
8Ω
R4
680Ω
R7
22kΩ
Vs-
3
4
R5
22kΩ
C9
2
5
UTC
TDA2030A
0.22 µF
1
R2
22kΩ
R9
1Ω
C5
22 µF
C2
100 µF
C3
100nF
R6
680Ω
Fig. 16 Bridge amplifier with split power supply(Po=34W,Vs+=16V,Vs-=16V)
UTC
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
MULTIWAY SPEAKER SYSTEMS AND ACTIVE BOXES
Multiway loudspeaker systems provide the best possible acoustic performance since each loudspeaker is
specially designed and optimized to handle a limited range of frequencies. Commonly, these loudspeaker systems
divide the audio spectrum two or three bands.
To maintain a flat frequency response over the Hi-Fi audio range the bands cobered by each loudspeaker must
overlap slightly. Imbalance between the loudspeakers produces unacceptable results therefore it is important to
ensure that each unit generates the correct amount of acoustic energy for its segments of the audio spectrum. In this
respect it is also important to know the energy distribution of the music spectrum to determine the cutoff frequencies
of the crossover filters(see Fig. 18).As an example,1 100W three-way system with crossover frequencies of 400Hz
and 3khz would require 50W for the woofer,35W for the midrange unit and 15W for the tweeter.
Both active and passive filters can be used for crossovers but active filters cost significantly less than a good
passive filter using aircored inductors and non-electrolytic capacitors. In addition active filters do not suffer from the
typical defects of passive filters:
--Power less;
--Increased impedance seen by the loudspeaker(lower damping)
--Difficulty of precise design due to variable loudspeaker impedance.
Obviously, active crossovers can only be used if a power amplifier is provide for each drive unit. This makes it
particularly interesting and economically sound to use monolithic power amplifiers.
In some applications complex filters are not relay necessary and simple RC low-pass and high-pass
networks(6dB/octave) can be recommended.
The result obtained are excellent because this is the best type of audio filter and the only one free from phase and
transient distortion.
The rather poor out of band attenuation of single RC filters means that the loudspeaker must operate linearly well
beyond the crossover frequency to avoid distortion.
A more effective solution, named "Active power Filter" by SGS is shown in Fig. 19.
The proposed circuit can realize combined power amplifiers and 12dB/octave or 18dB octave high-pass or
low-pass filters.
In proactive, at the input pins amplifier two equal and in-phase voltages are available, as required for the active
filter operations.
The impedance at the Pin(-) is of the order of 100Ω,while that of the Pin (+) is very high, which is also what was
wanted.
Fig. 18 Power distribution vs.
frequency
Fig. 19 Active power filter
100
C1 C2 C3
IEC/DIN NOISE
SPECTRUM
FOR SPEAKER
TESTING
80
Vs+
Morden
Music
Spectrum
RL
60
R1 R2
R3
3.3kΩ
Vs-
40
100Ω
20
0
1
10
2
10
UTC
3
10
4
10
5
10
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
The components values calculated for fc=900Hz using a Bessel 3rd Sallen and Key structure are:
C1=C2=C3=22nF,R1=8.2KΩ,R2=5.6KΩ,R3=33KΩ.
Using this type of crossover filter, a complete 3-way 60W active loudspeaker system is shown in Fig. 20.
It employs 2nd order Buttherworth filter with the crossover frequencies equal to 300Hz and 3kHz.
The midrange section consistors of two filters a high pass circuit followed by a low pass network. With Vs=36V the
output power delivered to the woofer is 25W at d=0.06%( 30W at d=0.5%).The power delivered to the midrange and
the tweeter can be optimized in the design phase taking in account the loudspeaker efficiency and
impedance(RL=4Ω to 8Ω).
It is quite common that midrange and tweeter speakers have an efficiency 3dB higher than woofers.
Fig. 20 : 3Way 60W Active Loudspeaker System (Vs=36V)
22kΩ
22kΩ
22kΩ
1N4001
1.5Ω
2
33nF
680Ω
18nF
1
5
BD908
4
UTC
TDA2030A
3
2200 µF
1Ω
100 µF
0.22 µF
1N4001
1.5Ω
3.3kΩ
100Ω
BD907
4Ω
1 µF
0.22 µF
IN
0.22 µF
2200 µF
Vs+
Low-pass
300Hz
Woofer
Vs+
Band-pass
300Hz to 3kHz
0.22 µF
1N4001
6.8kΩ
3.3nF
2
5
3
1N4001
100 µF
100Ω
Vs+
0.22 µF
1N4001
100 µF
4
3
1N4001
8Ω
1Ω
2
5
UTC
TDA2030A
0.22 µF
1
22kΩ
12kΩ
0.1 µF
22kΩ
100 µF
22kΩ
0.1 µF
Midrange
2.2kΩ
High-pass
3kHz
Vs+
220 µF
4
UTC
TDA2030A
8Ω
1
1Ω
22kΩ
18nF
22kΩ
0.22 µF
0.1 µF
3.3kΩ
0.1 µF
47 µF
100Ω
2.2kΩ
UTC
High-pass
3kHz
Tweeter
UNISONIC TECHNOLOGIES CO., LTD.
10
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
MUSICAL INSTRUMENTS AMPLIFIERS
Another important field of application for active system is music.
In this area the use of several medium power amplifiers is more convenient than a single high power amplifier, and it
is also more reliable. A typical example(see Fig. 21) consist of four amplifiers each driving a low-cost, 12 inch
loudspeaker. This application can supply 80 to 160W rms.
TRANSIENT INTER-MODULATION DISTORTION(TIM)
Transient inter-modulation distortion is an unfortunate phenomena associated with negative-feedback amplifiers.
When a feedback amplifier receives an input signal which rises very steeply, i.e. contains high-frequency
components, the feedback can arrive too late so that the amplifiers overloads and a burst of inter-modulation
distortion will be produced as in Fig.22.Since transients occur frequently in music this obviously a problem for the
designed of audio amplifiers. Unfortunately, heavy negative feedback is frequency used to reduce the total harmonic
distortion of an amplifier, which tends to aggravate the transient inter-modulation(TIM situation.)The best known
Fig.21 High power active box for musical
instrument
Fig.22 Overshoot phenomenon in
feedback amplifiers
FEEDBACK
PATH
20 to 40W
Amplifier
汕V4
INPUT
V1
PRE
AMPLIFIER
V2
V3
POWER
AMPLIFIER
OUTPUT
V4
20 to 40W
Amplifier
V1
20 to 40W
Amplifier
V2
20 to 40W
Amplifier
V3
V4
method for the measurement of TIM consists of feeding sine waves superimposed onto square wavers, into the
amplifier under test. The output spectrum is then examined using a spectrum analyzer and compared to the input.
This method suffers from serious disadvantages: the accuracy is limited, the measurement is a tatter delicate
operation and an expensive spectrum analyzer is essential. A new approach (see Technical Note 143(Applied by
SGS to monolithic amplifiers measurement is fast cheap, it requires nothing more sophisticated than an
oscilloscope-and sensitive-and it can be used down to the values as low as 0.002% in high power amplifiers.
The "inverting-sawtooth" method of measurement is based on the response of an amplifier to a 20KHz saw-tooth
wave-form. The amplifier has no difficulty following the slow ramp but it cannot follow the fast edge. The output will
follow the upper line in Fig.23 cutting of the shade area and thus increasing the mean level. If this output signal is
filtered to remove the saw-tooth, direct voltage remains which indicates the amount of TIM distortion, although it is
difficult to measure because it is indistinguishable from the DC offset of the amplifier. This problem is neatly avoided
in the IS-TIM method by periodically inverting the saw-tooth wave-form at a low audio frequency as shown in
Fig.24.Inthe case of the saw-tooth in Fig. 25 the means level was increased by the TIM distortion, for a saw-tooth in
the other direction the opposite is true.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
11
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
Input
Signal
SR(V/µs)
m2
m1
Filtered
Output
Siganal
Fig.23 20kHz sawtooth waveform
Fig.24 Inverting sawtooth waveform
The result is an AC signal at the output whole peak-to-peak value is the TIM voltage, which can be measured
easily with an oscilloscope. If the peak-topeak value of the signal and the peak-to-peak of the inverting sawtooth are
measured, the TIM can be found very simply from:
VOUT
TIM =
* 100
Vsawtooth
Fig. 25 TIM distortion Vs.
Output Power
Fig. 26 TIM design
diagram(fc=30kHz)
2
10
1
10
TIM(%)
UTC2030A
BD908/907
Gv=26dB
Vs=36V
RL=4Ω
RC Filter fc=30kHz
1
10
1%
=1
%
=0
.
TI
M
TI
0
10
M
RC Filter fc=30kHz
TI
-1
10
M
=0
.0
1%
0
10
SR(V/米s)
-2
10
-1
10
0
10
1
10
Po(W)
2
10
-1
10
-1
10
0
10
1
10
Vo(Vp-p)
2
10
In Fig.25 The experimental results are shown for the 30W amplifier using the UTC2030A as a driver and a
low-cost complementary pair. A simple RC filter on the input of the amplifier to limit the maximum signal slope(SS) is
an effective way to reduce TIM.
The Diagram of Fig.26 originated by SGS can be used to find the Slew-Rate(SR) required for a given output power
or voltage and a TIM design target.
For example if an anti-TIM filter with a cutoff at 30kHz is used and the max. Peak to peak output voltage is 20V then,
referring to the diagram, a Slew-Rate of 6V/µs is necessary for 0.1% TIM.
As shown Slew-Rates of above 10V/µs do not contribute to a further reduction in TIM.
Slew-Rates of 100V/µs are not only useless but also a disadvantage in hi-fi audio amplifiers because they tend to
turn the amplifier into a radio receiver.
POWER SUPPLY
Using monolithic audio amplifier with non regulated supply correctly. In any working case it must provide a supply
voltage less than the maximum value fixed by the IC breakdown voltage.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
12
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
It is essential to take into account all the working conditions, in particular mains fluctuations and supply voltage
variations with and without load. The UTC2030(Vsmax=44V) is particularly suitable for substitution of the standard
IC power amplifiers(with Vsmax=36V) for more reliable applications.
An example, using a simple full-wave rectifier followed by a capacitor filter, is shown in the table and in the diagram
of Fig.27.
A regulated supply is not usually used for the power output stages because of its dimensioning must be done
taking into account the power to supply in signal peaks. They are not only a small percentage of the total music
signal, with consequently large overdimensioning of the circuit.
Even if with a regulated supply higher output power can be obtained(Vs is constant in all working conditions),the
additional cost and power dissipation do not usually justify its use. using non-regulated supplies, there are fewer
designee restriction. In fact, when signal peaks are present, the capacitor filter acts as a flywheel supplying the
required energy.
In average conditions, the continuous power supplied is lower. The music power/continuous power ratio is greater
in case than for the case of regulated supplied, with space saving and cost reduction.
Fig.27 DC characteristics of
50W non-regulated supply
Ripple
(Vp-p)
Vo(V)
36
34
Ripple
4
32
220V
Vo
2
3300 µF
30
Vout
0
28
0
Mains(220V)
+20%
+15%
+10%
—
-10%
-15%
-20%
UTC
0.4
0.8
1.2
1.6
2.0
Io(A)
Secondary Voltage
28.8V
27.6V
26.4V
24V
21.6V
20.4V
19.2V
DC Output Voltage(Vo)
Io=0
43.2V
41.4V
39.6V
36.2V
32.4V
30.6V
28.8V
Io=0.1A
42V
40.3V
38.5V
35V
31.5V
29.8V
28V
Io=1A
37.5V
35.8V
34.2V
31V
27.8V
26V
24.3
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
SHORT CIRCUIT PROTECTION
The UTC TDA2030 has an original circuit which limits the current of the output transistors. This function can be
considered as being peak power limiting rather than simple current limiting. It reduces the possibility that the device
gets damaged during an accidental short circuit from AC output to Ground.
THERMAL SHUT-DOWN
The presence of a thermal limiting circuit offers the following advantages:
1).An overload on the output (even if it is permanent),or an above limit ambient temperature can be easily supported
since the Tj can not be higher than 150°C
2).The heatsink can have a smaller factor of safety compared with that of a congenital circuit, There is no possibility
of device damage due to high junction temperature increase up to 150, the thermal shut-down simply reduces the
power dissipation and the current consumption.
APPLICATION SUGGESTION
The recommended values of the components are those shown on application circuit of Fig.14. Different values can
be used. The following table can help the designer.
COMPONENT
RECOMMENDED
VALUE
PURPOSE
LARGE THAN
RECOMMENDED
VALUE
LARGE THAN
RECOMMENDED
VALUE
R1
22KΩ
Increase of Gain
Decrease of Gain
R2
680Ω
Decrease of Gain
Increase of Gain
R3
22KΩ
1Ω
R5
≈3R2
Increase of input
impedance
Danger of oscillation
at high frequencies
with inductive loads.
Poor high frequencies
attenuation
Decrease of input
impedance
R4
Closed loop gaon
setting.
Closed loop gaon
setting.
Non inverting input
biasing
Frequency stacility
C1
1µF
C2
22µF
C3,C4
0.1µF
C5,C6
100µF
C7
C8
0.22µF
≈1/(2π*B*R1)
D1,D2
1N4001
UTC
Upper frequency
cutoff
Input DC decoupling
Inverting DC
decoupling
Supply voltage
bypass
Supply voltage
bypass
Frequency stability
Upper frequency
cutoff
To protect the device
against output voltage
spikes.
Dange of oscillation
Increase of low
frequencies cutoff
Increase of low
frequencies cutoff
Dange of oscillation
Dange of oscillation
smaller bandwidth
Larger bandwidth
Larger bandwidth
UNISONIC TECHNOLOGIES CO., LTD.
14
QW-R107-005,B
UTC TDA2030A LINEAR INTEGRATED CIRCUIT
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
15
QW-R107-005,B