STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 17

• 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