STEVAL-CCA002V1 STMicroelectronics, STEVAL-CCA002V1 Datasheet - Page 27

• Manufacturer Part Number: STEVAL-CCA002V1
• Description: BOARD EVAL FOR LP DIFF TS4994IQT
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA002V1

• Design Resources: STEVAL-CCA002V1 Gerber Files
• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4994
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.5 V to 5.5 V
• Output Power: 1 W
• Product: Audio Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: TS4994
• Kit Application Type: Amplifier
• Application Sub Type: Audio Power Amplifier
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4994
• Other names: 497-6395; STEVAL-CCA002V1

TS4994
Note:
and
Therefore, the average current delivered by the supply voltage is:
Equation 1
The power delivered by the supply voltage is:
Therefore, the power dissipated by each amplifier is:
Equation 2
and the maximum value is obtained when:
and its value is:
Equation 3
This maximum value is only dependent on the power supply voltage and load values.
The efficiency is the ratio between the output power and the power supply:
Equation 4
The maximum theoretical value is reached when V
The maximum die temperature allowable for the TS4994 is 125°C. However, in case of
overheating, a thermal shutdown set to 150°C, puts the TS4994 in standby until the
temperature of the die is reduced by about 5°C.
P
P
supply
P
diss
diss
I
Pdiss
CC
η =
P
=
AVG = 2
=
out
=
η =
max
2 2V
---------------------- P
P
------------------ - =
P
V
π R
∂P
---------------- - = 0
=
supply
P
supply
CC
∂P
π
---- - = 78.5%
=
4
out
V
-------------------- - (W)
diss
2
peak
out
⋅
CC
2R
L
π
Vcc
2
V
---------------- - (A)
I
R
–
CC
πR
L
peak
L
2
P
2
--------------------
πV
PEAK
AVG
4V
L
out
out
(
W
peak
)
CC
–
P
out
= V
(W)
(W)
CC
, so:
Application information
27/35