TDA2005R STMicroelectronics, TDA2005R Datasheet - Page 9

• Manufacturer Part Number: TDA2005R
• Description: IC AMP AUD 20W CLASS B DUAL
• Manufacturer: STMicroelectronics
• Type: Class Br

Specifications of TDA2005R

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 22W x 1 @ 3.2 Ohm; 12W x 2 @ 2 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Short-Circuit and Thermal Protection
• Mounting Type: Through Hole
• Package / Case: Multiwatt-11 (Vertical, Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA2005
2.3.2
Bridge amplifier design
The following considerations can be useful when designing a bridge amplifier.
Table 5.
Where:
Voltage and current swings are twice for a bridge amplifier in comparison with single ended
amplifier.
In order words, with the same R
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 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 V
above the absolute maximum rating.
From the expression for I
that can be driven by TDA2005 in bridge configuration is:
The voltage gain of the bridge configuration is given by (see
V
P
I
o max
o max
o max
V
V
R
CE sat
S
L
= load impedance
= allowable supply voltage
Peak output voltage (before clipping)
Peak Output current (before clipping)
RMS output power (before clipping)
= output transistors saturation voltage
Bridge amplifier design
Parameter
R
Omax
Lmin
, assuming V
G
=
Doc ID 1451 Rev 4
L
v
the bridge configuration can deliver an output power that is
V
----------------------------------- -
=
s
V
------ -
V
–
I
S
Omax
0
1
2V
and R
=
CEsat
1
S
+
= 14.4V and V
L
--------------------------
⎛
⎜
⎝
in order to avoid an output peak current
-------------------- -
R
R
=
2
2
R
14.4 4
-------------------- -
+
⋅
1
1
-- -
4
R
R
1
-- - V
2
3.5
1
-- -
2
(
------------------------------------------ -
Single ended
(
4
V
4
V
-----------------------------------
⎞
⎟
⎠
–
s
s
s
–
+
–
–
2V
2R
R
------ -
R
2V
2V
CE sat
R
=
Figure
3
4
L
CEsat
CEsat
CEsat
L
2.97Ω
= 2V, the minimum load
Electrical specifications
)
)
2
36):
(
------------------------------------------ -
V
V
V
-----------------------------------
s
s
s
–
–
–
Bridge
2V
2R
2V
2V
R
L
CEsat
CEsat
CEsat
L
)
2
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