DEMOTS4956J STMicroelectronics, DEMOTS4956J Datasheet - Page 43

• 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
Note:
and the maximum value is obtained when:
and its value is:
This maximum value depends only on the power supply voltage and load values.
The efficiency is the ratio between the output power and the power supply.
The maximum theoretical value is reached when V
The TS4956 has one active output BTL power amplifier when in modes 1 and 2. In mode 7,
the TS49656 has two active output BTL power amplifiers.
Each amplifier produces heat due to its power dissipation. Therefore the maximum die
temperature is the sum of each amplifier’s maximum power dissipation. It is calculated as
follows.
In most cases, P
●
●
●
P
P
Total P
diss 1
diss 2
diss 1
= power dissipation due to the first BTL power amplifier.
= power dissipation due to the second BTL power amplifier.
diss
= P
= P
diss 2
TotalP
diss 1
, giving:
diss
+ P
TotalP
P
diss
diss 2
=
η
η
4 2V
---------------------- P
=
MAX
∂P
∂
=
π R
P
diss
-- -
4
π
diss
------------------ -
P
out
(W)
=
P
supply
=
CC
L
out
2V
-------------- - W
=
π
78.5%
=
2
2P
R
2
CC
0
L
PEAK
=
out
diss1
(
πV
-------------------- -
–
4V
)
2P
PEAK
= V
CC
out
CC
, so
(W)
Application information
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