DEMOTS4956J STMicroelectronics, DEMOTS4956J Datasheet - Page 40

• Manufacturer Part Number: DEMOTS4956J
• Description: BOARD DEMO TS4956EIJT/EIKJT
• Manufacturer: STMicroelectronics

Specifications of DEMOTS4956J

• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm; 43mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4956
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.7 V to 5.5 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4956
• Other names: 497-6381; DEMOTS4956J

TS4956
4.3
4.3.1
Power dissipation and efficiency
Hypotheses:
Regarding the load we have:
Single-ended output configuration (modes 5 and 6)
The average current delivered by the supply voltage is:
Figure 124. Current delivered by supply voltage in a single-ended output configuration
The power delivered by the supply voltage is:
Therefore, the power dissipation by the single-ended amplifier is
and the maximum value is obtained when:
●
●
and
and
The voltage and current in the load are sinusoidal (V
The supply voltage is a pure DC source (V
cc
AVG
=
P
diss
------
2π
1
P
P
V
supply
diss
∫
π
0
out
=
P
V
---------------- -
------------------ - P
I
out
PEAK
out
π R
=
R
=
2V
∂P
∂
L
=
P
P
V
=
CC
=
diss
out
supply
PEAK
L
V
sin
V
---------------- - A
V
---------- - A
CC
2R
R
2
PEAK
out
t ( )
=
L
I
out
sin
CC
L
–
( )
t d
0
P
( )
AVG
out
–
ωt V
=
P
( )
(
(
out
V
---------------- - A
W
W
πR
PEAK
)
)
(
CC
W
L
).
)
( )
Application information
out
and I
out
).
40/55