STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 17
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STEVAL-CCA019V1
Manufacturer Part Number
STEVAL-CCA019V1
Description
BOARD EVAL AUDIO AMP FOR TS4982
Manufacturer
STMicroelectronics
Specifications of STEVAL-CCA019V1
Amplifier Type
Class AB
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2W x 2 @ 4 Ohm; 125mW x 2 @ 16 Ohm
Voltage - Supply
5.0V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
TS4982
Description/function
Audio Amplifiers
Operating Supply Voltage
5 V
Output Power
2 W
Product
Audio Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
TS4982
Other names
497-10339
TS4982
4.3
Bridge tied load (BTL) means that each end of the load is connected to two single-ended
output amplifiers. Therefore, we have:
Single-ended output 1 = V
Single-ended output 2 = V
BTL output = V
The output power is:
For the same power supply voltage, the output power in a BTL configuration is four times
higher than the output power in a single-ended configuration.
Power dissipation and efficiency
Hypotheses:
The voltage and current in the load are sinusoidal (V
The supply voltage is a pure DC source (V
Regarding the load we have:
and
and
Therefore, the average current delivered by the supply voltage is:
Figure 39. Current delivered by power supply voltage
out1
Vpeak/R
- V
Icc (t)
Icc
AVG
out2
L
0
out1
out2
= 2V
= V
= -V
Doc ID 14527 Rev 2
out
out
T/2
V
out
out
I
P
CC
P
out
out
= V
AVG
I
out
=
=
PEAK
= 2
V
------------------------ -
cc
=
(
------------------------------------ -
PEAK
2V
).
2R
V
------------- -
V
------------------ -
T
R
out
outRMS
sin
π
PEAK
L
L
R
R
2
ω
L
L
t
out
(A)
)
(V)
2
3T/2
(W)
and I
(A)
out
).
Application information
2T
Time
17/31