參數(shù)資料
型號(hào)： TS4851IJT
廠商： STMICROELECTRONICS
元件分類： 音頻控制
英文描述： 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA18
封裝： FCP-18
文件頁(yè)數(shù)： 13/28頁(yè)
文件大?。?/td> 1280K
代理商： TS4851IJT
TS4851
Application Information
20/28
5 Application Information
5.1 BTL configuration principles
The TS4851 integrates 3 monolithic power amplifier having BTL output. BTL (Bridge Tied Load) means
that each end of the load is connected to two single-ended output amplifiers. Thus, we have:
Single ended output 1 = Vout1 = Vout (V)
Single ended output 2 = Vout2 = -Vout (V)
and
Vout1 - Vout2 = 2Vout (V)
The output power is:
For the same power supply voltage, the output power in BTL configuration is four times higher than the
output power in single ended configuration.
5.2 Power dissipation and efficiency
Hypotheses:
l Voltage and current in the load are sinusoidal (Vout and Iout).
l Supply voltage is a pure DC source (Vcc).
Regarding the load we have:
and
Then, the average current delivered by the supply voltage is:
The power delivered by the supply voltage is:
Psupply = Vcc IccAVG (W)
Then, the power dissipated by each amplifier is
Pdiss = Psupply - Pout (W)
)
W
(
R
)
Vout
2
(
Pout
L
2
RMS
=
VOUT = VPEAK sinωt (V)
IOUT =
VOUT
R L
----------------- (A)
POUT =
VPEAK
2
2RL
---------------------- (W)
ICC
AVG
= 2
VPEA K
πRL
-------------------- (A)
)
W
(
P
R
V
2
P
OUT
L
CC
diss
π
=
相關(guān)PDF資料
PDF描述
TS487-1IQT 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8
TS487-1IST 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS487-2IQT 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8
TS487-2IST 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS487-4IQT 0.108 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO8
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