UNISONIC TECHNOLOGIES CO., LTD
PA2005
LINEAR INTEGRATED CIRCUIT
20W BRIDGE AMPLIFIER FOR
CAR RADIO
„
DESCRIPTION
The UTC PA2005 is class B dual audio power amplifier, have
designed for car radio application.
„
FEATURES
* High output power:
POUT=10+10W@RL=2Ω, THD=10%
POUT=20W@RL=4Ω, THD=1%
„
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
PA2005L-J11-A-T
PA2005G-J11-A-T
PA2005L-H14-B-T
PA2005G-H14-B-T
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Copyright © 2010 Unisonic Technologies Co., Ltd
Package
Packing
HZIP-11A
HSIP-14B
Tube
Tube
1 of 16
QW-R107-035,D
PA2005
„
PIN CONFIGURATION
HSIP-14B
HZIP-11A
„
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NO.
PIN NAME
HZIP-11 HSIP-14*
1
1
INPUT+ (1)
2
2
INPUT- (1)
3
3
SVRR
4
4
INPUT- (2)
5
5
INPUT+ (2)
6
6
GND
7
10
BOOTSTRAP 2
8
11
OUTPUT 2
9
12
+VS
10
13
OUTPUT 1
11
14
BOOTSTRAP 1
* PIN 7, 8, 9 no connection.
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QW-R107-035,D
www.unisonic.com.tw
10
10mΩ
OUTPUT INMIDIT
FOR DC/AC
SNORT CRCUIT
S.O.A
PROICCTION
2
1
R1
3
THERMAL
SHUT DOWN
Vref
OUMP
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5
4
OUTPUT INMIDIT
FOR DC/AC
SNORT CRCUIT
R1
S.O.A
PROICCTION
6
8
10mΩ
9
7
„
11
PA2005
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
QW-R107-035,D
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PA2005
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Operating Supply Voltage
DC Supply Voltage
Peak Supply Voltage (for 50ms)
non repetitive t=0.1ms
Output Peak Current (Note)
repetitive f ≥10Hz
Power Dissipation at Tc=60°C
Junction Temperature
Storage Temperature
Note: The max. output current is internally limited.
„
RATINGS
18
28
40
4.5
3.5
30
+150
-40 ~ 150
UNIT
V
V
V
A
A
W
°C
°C
SYMBOL
θJC
RATINGS
3.0
UNIT
°C /W
THERMAL DATA
PARAMETER
Junction to Case
„
SYMBOL
Vss
Vss
Vss
Io
Io
PD
TJ
TSTG
ELECTRICAL CHARACTERISTICS
(Refer to the application circuit, Ta=25°C, Gv=50dB, Rth(heatsink)=4℃/W, unless otherwise specified.)
PARAMETER
BRIDGE
Supply Voltage
Output Offset Voltage
(between pin 8 and pin 10)
Total Quiescent Drain Current
SYMBOL
Vss
Vos
ID
Output Power
POUT
Total Harmonic Distortion
f=1KHz
THD
Input Sensitivity
f=1kHz
Input Resistance
Low Frequency Roll Off (-3dB)
High Frequency Roll Off (-3dB)
Closed Loop Voltage Gain
Total Input Noise Voltage
Supply Voltage Rejection
VIN
RIN
fL
fH
GV
eN
SVR
η
Efficiency
Thermal Shut-down Junction
Temperature
Output Voltage With One Side of
the Speaker Shorted to Ground
TEST CONDITIONS
TJ
VOSH
TYP
MAX
UNIT
75
70
18
150
150
150
160
V
mV
mV
mA
mA
8
Vss=14.4V
Vss=13.2V
Vss=14.4V, RL=4Ω
Vss=13.2V, RL=3.2Ω
THD=10%, f=1Hz
Vss=14.4V, RL=4Ω
RL=3.2Ω
Vss=13.2V, RL=3.2Ω
Vss=14.4V, RL=4Ω
POUT=50mW ~ 15W
Vss=13.2V, RL=3.2Ω
POUT=50mW ~ 13W
POUT=2W, RL=4Ω
POUT=2W, RL=3.2Ω
f=1kHz
RL=3.2Ω
RL=3.2Ω
f=1kHz
RG=10kΩ(Note 1)
RG=10kΩ, C4=10μF
FRIPPLE=100Hz, VRIPPLE=0.5V
Vss=14.4V, f=1kHz
POUT=20W, RL=4Ω
POUT=22W, RL=3.2Ω
Vss=13.2V, f=1kHz
POUT=19W, RL=3.2Ω
Vss=14.4V, RL=4Ω
f=1kHz, PD=13W
Vss=14.4V, RL=4Ω
Vss=13.2V, RL=3.2Ω
UNISONIC TECHNOLOGIES CO., LTD
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MIN
18
20
17
20
22
19
W
1
%
1
%
40
mV
mV
kΩ
Hz
kHz
dB
μV
9
8
70
20
50
3
45
10
55
dB
60
60
%
58
%
145
°C
2
V
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LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
STEREO
Supply Voltage
SYMBOL
Quiescent Output Voltage
Total Quiescent Drain Current
TEST CONDITIONS
Vss
VOUT
ID
8
6.6
6
Vss=14.4V
Vss=13.2V
Vss=14.4V
Vss=13.2V
RL=4Ω
Vss=14.4V
Output Power (each channel)
f=1Hz, THD=10%
POUT
Vss=13.2V
Total Harmonic Distortion
(each channel) f=1KHz
Cross Talk
THD
CT
Input Saturation Voltage
VIN
Input Sensitivity
VIN
Input Resistance
Low Frequency Roll Off (-3dB)
High Frequency Roll Off (-3dB)
Voltage Gain (open Ioop)
Voltage Gain (close Ioop)
Closed Loop Gain Matching
Total Input Noise Voltage
RIN
fL
fH
GV
GV
△GV
En
Supply Voltage Rejection
SVR
η
Efficiency
MIN
RL=3.2Ω
6
7
RL=2Ω
RL=1.6Ω
RL=3.2Ω
RL=1.6Ω
9
10
6
9
Vss=16V, RL=2Ω
Vss=14.4V, RL=4Ω
POUT=50mW ~ 4W
Vss=14.4V, RL=2Ω
POUT=50mW ~ 6W
Vss=13.2V, RL=3.2Ω
POUT=50mW ~ 3W
Vss=13.2V, RL=1.6Ω
POUT=40mW ~ 6W
Vss=14.4V,
f=1KHz
VOUT=4VRMS
RL=4Ω,
f=10kHz
RG=5KΩ
TYP
7.2
6.6
65
62
6.5
8
MAX
UNIT
18
7.8
7.2
120
120
V
V
V
mA
mA
10
11
6.5
10
12
W
0.2
1
%
0.3
1
%
0.2
1
%
0.3
1
%
60
dB
45
300
f=1kHz, POUT=1W
RL=4Ω
RL=3.2Ω
f=1kHz
RL=2Ω
RL=2Ω
f=1kHz
f=1kHz
RG=10kΩ (Note 1)
RG=10kΩ, C3=10μF
FRIPPLE=100Hz, VRIPPLE=0.5V
Vss=14.4V, f=1kHz
POUT=6.5W, RL=4Ω
POUT=10W, RL=2Ω
Vss=13.2V, f=1kHz
POUT=6.5W, RL=3.2Ω
POUT=10W, RL=1.6Ω
70
mV
mV
6
5.5
200
50
15
48
35
90
50
0.5
1.5
51
5
kΩ
Hz
kHz
dB
dB
dB
μV
45
dB
70
60
%
%
70
60
%
%
Note: 1. Bandwith Filter: 22Hz ~ 22kHz
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5 of 16
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PA2005
„
LINEAR INTEGRATED CIRCUIT
TEST AND APPLICATION CIRCUIT
Bridge amplifier
+Vs
C3
0.1µF
C1
2.2µF/ 3V
INPUT
R1
120KΩ
9
C4
10µF
3
C5
100µF/ 10V
1
11
+ 1/2
PA2005
-
10
C6
220µF/ 3V
C9
0.1µF
R2
1KΩ
2
C2
2.2µF/ 3V
R6
1Ω
C7
100µF/10V
5
RL
7
+ 1/2
PA2005
-
8
R3
2KΩ
C10
0.1µF
R4
12Ω
R7
1Ω
4
C8
220µF/ 3V
6
R5
12Ω
Stereo amplifier
+Vs
0.1µF
R1
120KΩ
9
INPUT
(L)
C4
10µF
3
C4
100µF
C1
2.2µF
5
C10
2200µF
7
+ 1/2
PA2005
-
8
C5
220µF
4
C2
2.2µF
INPUT
(R)
1
C6
100µF
+ 1/2
PA2005
-
R2
1.2KΩ
R3
3.3Ω
C8
0.1µF
11
10
C7
220µF
R4
1.2KΩ
C11
2200µF
C9
0.1µF
RL
2
6
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RL
R6
1Ω
R5
3.3Ω
R7
1Ω
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PA2005
„
LINEAR INTEGRATED CIRCUIT
BRIDGE AMPLIFIER DESIGN
The following consideraions can be useful when designing a bridge amplifier.
PARAMETER
SINGLE ENDED
BRIDGE
VOUT max
Peak Output Voltage (before clipping)
1
(Vs-2VCE sat)
2
Vs-2VCE sat
IOUT max
Peak Output Current (before clipping)
1
2
Vs-2V CE sat
RL
POUT max
RMS Output Power (before clipping)
1 (Vs-2VCE sat)2
4
2RL
Vs-2V CE sat
RL
(Vs-2VCE sat )2
2RL
Where: VCE sat=output transistors saturation voltage
Vs=allowable supply voltage
RL=load impedance
Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In order
words, with the same RL the bridge configuration can deliver an output power that is four times the output power of a
single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power
that is twice the output power of a single ended amplifier. Core must be taken when selecting Vs and RL in order to
avoid an output peak current above the absolute maximum rating.
From the expression for Io max, assuming Vs=14.4V and VCE sat=2V, the minimum load that can be driven by
UTC PA2005 in bridge configuration is:
The voltage gain of the bridge configuration is given by (see Figure 3):
Gv= V0
V1
=1+
R1
+
R2× R4
R2 + R4
R3
R4
For sufficiently high gains (40 ~ 50dB) it is possible to put R2=R4 and R3=2R1, simplifing the formula in:
Gv=4 R1
R2
Gv (dB)
40
50
R1(Ω)
R2=R4(Ω)
R3(Ω)
1000
1000
39
12
2000
2000
Bridge Configuration
VD
Vi
+
-
+
-
RL
R1
R3
R4
R2
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7 of 16
QW-R107-035,D
PA2005
„
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
Bridge Amplifier without Boostrap
Low Cost Bridge Amplifier (Gv=42dB)
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8 of 16
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PA2005
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LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION(Cont.)
10+10W Stereo Amplifier with Tone Balance and Loudness Control
Vs=+14.4V
R1
120KΩ
0.1μF
INPUT(L)
9
5.6KΩ
10μF
3
47nF
2.2nF
P1
100KΩ
+ 1/2
PA2005
-
2.2nF
4
100KΩ
P5
0.15μF
0.22μF
47nF
47KΩ
2
2.2nF
P2
C9
2200μF
C5
100μF
100μF
11
10
+ 1/2
PA2005
-
5.6KΩ
100μF
8
P3
100KΩ
2.7KΩ
INPUT(R)
7
0.22μF
47KΩ
C7
0.1μF
R4
3.3Ω
R7
1Ω
C6
100μF
R5
1KΩ
4Ω
4Ω
R6
3.3Ω
6
2.2nF
4Ω
C8
0.1μF
R8
1Ω
2.7KΩ
4Ω
2200μF
P4
100KΩ
100KΩ
R3
1KΩ
0.15μF
Tone Control Response (circuit of Fihure 8)
12
9
6
dB
3
MID
0
-3
TREBLE
BASS
-6
-9
-12
10
102
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103
f (Hz)
104
5
10
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LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION(Cont.)
20W Bus Amplifier
Simple 20W Two Way Amplifier (Fc=2kHz)
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QW-R107-035,D
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LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION(Cont.)
Bridge Amplifier Circuit suited for Low-gain Applications (Gv=34dB)
Figure 1. Example of Muting Circuit
+
1/2
-
12KΩ
+
1/2
-
12KΩ
MUTE
SWITCH
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+Vs
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LINEAR INTEGRATED CIRCUIT
BUILT-IN PROTECTION SYSTEMS
LOAD DUMP VOLTAGE SURGE
The UTC PA2005 has a circuit which enables it to withstand a voltage pulse train, on pin9, of the type shown in
Figure 3.
If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin9, in
order to assure that the pulses at pin 9 will be held withing the limits shown.
A suggested LC network is shown in Figure 2, With this network, a train of pulses with amplitude up to 120V and
width of 2ms can be applied at point A, This type of protection is ON when the supply voltage (pulse or DC) exceeds
18V. For this reason the maximum operating supply voltage is 18V.
Figure 3
Figure 2
Vs(V)
40
FROM
SUPPLY
LINE
A
L=2mH
t1=50ms
t2=1000ms
TO PIN 9
C
3000μ F
16V
14.4
t
t1
t2
SHORT CIRCUIT (AC AND DC CONDITIONS)
The UTC PA2005 can withstand a permanent short circuit on the output for a supply voltage up to 16V.
POLARITY INVERSION
High current (up to 10A) can be handled by the device with no damage for a longer period than the blow-out time
of a quick 2A fuse (normally connected in series with the supply). This feature is added to avoid destruction, if during
fitting to the car, a mistake on the connection of the supply is made.
OPEN GROUND
When the ratio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be
damaged. On the UTC PA2005 protection diodes are included to avoid any damage.
INDUCTIVE LOAD
A protection diode is provided to allow use of the UTC PA2005 with inductive loads.
DC VOLTAGE
The maxim operating DC voltage for the UTC PA2005 is 18V.
However the device can withstand a DC voltage up to 28V with no damage. This could occur during winter if two
batteries are series connected to crank the engine.
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 excessive ambient temperature can be easily
withstood.
(2). The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no
device damage in the case of excessive junction temperature; all that happens is that Po (and therefore Ptot) and Id
are reduced.
The maximum allowable power dissipation depends upon the size of the external heatsink (i.e. its thermal
resistance); Figure 4 shows the dissipation power as a function of ambient temperature for different thermal
resistance.
LOUDSPEAKER PROTECTION
The circuit offers loudspeaker protection during short circuit for one wire to ground.
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„
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTORISTICS
ITE
FIN
IN
K
SIN
AT
HE
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13 of 16
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTORISTICS (cont.)
THD (%)
POUT (W)
ID (mA)
VoUT (V)
„
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTORISTICS (cont.)
Figure17. Supply Voltage Rejection versusC3
(Stereo amplifier)
Figure 16. Distortion versus Frequency
(Stereo amplifier)
Vs=14.4V
Vs=13.2V
Gv=50dB
1.2
VRIPPLE=0.5v
Gv=50dB
RL=3.2Ω
20
SVR (dB)
Po=2.5W
RL=1.6Ω
THD (%)
fRIPPLE=100KHz
10
0.8
30
40
50
0.4
60
Po=2.5W
RL=3.2Ω
10
10 2
10 3
1
10 4
30
10
C3 (μF)
Figure 18. Supply Voltage Rejection versus
Frequency(Stereo amplifier)
Figure 19. Supply Voltage Rejection versus C2 and C3
(Stereo amplifier)
Vs=14.4V
R L =4Ω
Rg=10KΩ
Gv=390/1Ω
f RIPPLE =100Hz
Vs=14.4V
Gv=50dB
C3=10μF
60
50
40
RG=10KΩ
30
SVR (dB)
RG=0
50
SVR (dB)
3
f (Hz)
20
C2=220 μF
C2=22 μF
40
C2=5 μF
30
20
10
10 2
10 3
1
2
5
f (Hz)
Figure 21. Gain versus Input Sensitivity
(Stereo amplifier)
Figure 20. Supply Voltage Rejection versus C2 and C3
(Stereo amplifier)
54
C2=22 μF
C2=5 μF
40
Vs=14.4V
f=1KHz
RL=4 Ω
50
46
200
PoUT=6W
42
100
38
30
500
Gv
SVR (dB)
50
C2=220 μF
Gv (dB)
Vs=14.4V
RL =4Ω
Rg=10KΩ
Gv=1000/10Ω
t RIPPLE=100Hz
10 20
C3 (μF)
34
50
PoUT=0.5W
30
20
20
26
1
2
5
10
C3 (μF)
20
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22
10
2
30
4
6 8
100
VI (mV)
2
300
4
6 8
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTORISTICS (cont.)
„
Figure 23. Total Power Dissipation and
Efficiency versus Output Power
(Bridge amplifier)
Figure 22. Gain versus Input Sensitivity
(Stereo amplifier)
Vs=14.4V
f=1KHz
RL=2Ω
54
500
12
42
100
PoUT=10W
38
50
η
8
40
4
PoUT=0.5W
30
2
30
6 8
4
100
VI (mV)
2
300
4
Vs=14.4V
RL=4Ω
f=1KHz
Gv=50dB
2
20
26
10
PD
10
6
34
22
60
η(%)
200
PD (W)
46
Gv
Gv (dB)
50
4
6 8
8
12
16
20
PoUT (W)
20
26
Figure 24. Total Power Dissipation and
Efficiency versus Output Power
(Stereo amplifier)
6
60
η
40
4
2
Vs=13.2V
RL=3.2Ω
f=1KHz
Gv=50dB
2
4
6
8
10
η(%)
PD (W)
PD
20
12
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.
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