tda2005-j11-a-t ETC-unknow, tda2005-j11-a-t Datasheet - Page 7

• Manufacturer Part Number: tda2005-j11-a-t
• Description: 20w Bridge Amplifier For Car Radio
• Manufacturer: ETC-unknow

TDA2005
The following consideraions can be useful when designing a bridge amplifier.
Where: V
words, with the same R
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 R
avoid an output peak current above the absolute maximum rating.
UTC TDA2005 in bridge configuration is:
Bridge Configuration
Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In order
From the expression for Io max, assuming Vs=14.4V and V
The voltage gain of the bridge configuration is given by (see Figure 3):
For sufficiently high gains (40 ~ 50dB) it is possible to put R2=R4 and R3=2R1, simplifing the formula in:
V
P
I
OUT
Gv=4 R
Gv= V
OUT
OUT
R
BRIDGE AMPLIFIER DESIGN
L
min=
max
Vs=allowable supply voltage
R
max
max
V
R
Gv (dB)
CE
0
1
L
1
2
=load impedance
40
50
=1+
sat=output transistors saturation voltage
UNISONIC TECHNOLOGIES CO., LTD
Vs-2V
www.unisonic.com.tw
Io
UT
R
R
Peak Output Voltage (before clipping)
Peak Output Current (before clipping)
RMS Output Power (before clipping)
max
CE
2
2×
R
+ R
sat
1
R
4
4
PARAMETER
+
L
=
the bridge configuration can deliver an output power that is four times the output power of a
R
R
14.4 - 4
3
4
3.5
V
i
=2.97Ω
R1(Ω)
1000
1000
R2
+
-
R1
R4
R
V
D
L
CE
SINGLE ENDED
R2=R4(Ω)
sat=2V, the minimum load that can be driven by
1
4
1
2
1
2
(Vs-2V
(Vs-2V
39
12
Vs-2V
R3
LINEAR INTEGRATED CIRCUIT
2R
R
CE
L
L
CE
CE
sat
+
-
sat
sat
)
2
)
(Vs-2V
R3(Ω)
BRIDGE
Vs-2V
Vs-2V
2000
2000
QW-R107-035,B
2R
R
L
CE
CE
CE
L
L
sat
sat
sat
in order to
)
2
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