TS4995EIJT STMicroelectronics, TS4995EIJT Datasheet - Page 19

• Manufacturer Part Number: TS4995EIJT
• Description: IC AMP AUDIO PWR 1.2W 9FLIPCHIP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4995EIJT

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.2W x 1 @ 8 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Differential Inputs, Standby, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 9-FlipChip
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6101-2

TS4995
Note:
Therefore, the power dissipated by each amplifier is:
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 TS4995 is 125° C. However, in case of
overheating, a thermal shutdown set to 150° C, puts the TS4995 in standby until the
temperature of the die is reduced by about 5° C.
To calculate the maximum ambient temperature T
●
●
●
Example: V
Using the power dissipation formula given above in
T
Equation 5
Therefore, the maximum allowable value for T
amb
P
The power supply voltage, V
The load resistor value, R
The package type, R
P
T
is calculated as follows:
amb
diss
dissmax
= P
= 125-100x0.633=61.7° C
CC
supply
= 633mW
=5 V, R
- P
L
out
=8 Ω, R
(W)
thja
L
T
thja-flipchip
amb
P
CC
diss
Pdiss
=
η =
125° C R
=
max
2 2V
---------------------- P
= 100° C/W (100 mm
η =
------------------ - =
P
π R
∂Pdiss
-------------------- - = 0
P
supply
∂P
=
out
π
---- - = 78.5%
–
4
2
amb
out
CC
L
π
Vcc
2
thja
R
L
amb
2
is:
--------------------
πV
peak
4V
×
out
(
Equation
W
P
peak
)
CC
allowable, you need to know:
–
dissmax
P
= V
out
CC
3, this gives a result of:
, so:
2
copper heatsink).
Application information
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