TS4974IQT STMicroelectronics, TS4974IQT Datasheet - Page 17

• Manufacturer Part Number: TS4974IQT
• Description: IC AMP AUDIO PWR 1W MONO 10DFN
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4974IQT

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Differential Inputs, Standby, Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• For Use With: 497-6382 - BOARD DEMO FOR TS4974IQT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5994-2

TS4974
4.3
Assumptions:
Power dissipation and efficiency
●
●
The output voltage is:
and
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
Load voltage and current are sinusoidal (V
Supply voltage is a pure DC source (V
P
P
supply
diss
= P
= V
supply
CC
I
CC AVG
- P
out
(W)
(W)
P
diss
I
CC
V
P
=
out
out
AVG = 2
I
out
2 2V
---------------------- P
= V peak sinωt (V)
=
π R
=
CC
V
-------------------- - (W)
V
------------ - (A)
peak
2R
R
CC
)
L
out
out
L
V
---------------- - (A)
L
πR
2
peak
and I
L
out
–
P
out
out
)
Application information
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