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TA1101B 데이터시트(PDF) 10 Page - Tripath Technology Inc.

부품명 TA1101B
상세설명  Stereo 10W (4?? Class-T??Digital Audio Amplifier using Digital Power Processing??Technology
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제조업체  TRIPATH [Tripath Technology Inc.]
홈페이지  http://www.etelos.com/
Logo TRIPATH - Tripath Technology Inc.

TA1101B 데이터시트(HTML) 10 Page - Tripath Technology Inc.

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TECHNICAL INFORMATION
10
TA1101B, Rev. 2.2, 08.17.00
Sleep Pin
The SLEEP pin is a 5V logic input that when pulled high (>3.5V) puts the part into a low quiescent current
mode. This pin is internally clamped by a zener diode to approximately 6V thus allowing the pin to be
pulled up through a large valued resistor (1M
Ω recommended) to V
DD. To disable SLEEP mode, the sleep
pin should be grounded.
Fault Pin
The FAULT pin is a 5V logic output that indicates various fault conditions within the device.
These
conditions include: low supply voltage, low charge pump voltage, low 5V regulator voltage, over current at
any output, and junction temperature greater than approximately 155
°C. All faults except overcurrent all
reset upon removal of the condition. The FAULT output is capable of directly driving an LED through a
series 200
Ω resistor. If the FAULT pin is connected directly to the MUTE input an automatic reset will
occur in the event of an over-current condition.
Power Dissipation Derating
For operating at ambient temperatures above 25
°C the device must be derated based on a 150°C
maximum junction temperature, TJMAX as given by the following equation:
JA
A
JMAX
DISS
)
T
T
(
P
θ
=
Where
θ
JA of the package is determined from the following graph:
In the above graph Copper Area is the size of the copper pad on the PC board to which the heat slug of
the TA1101B is soldered. The heat slug must be soldered to the PCB to increase the maximum power
dissipation capability of the TA1101B package. Soldering will minimize the likelihood of an over-
temperature fault occurring during continuous heavy load conditions. The vias used for connecting the
heatslug to the copper area on the PCB should be 0.013” diameter.
Θ
Θ
Θ
Θ JA vs Copper Area
10
20
30
40
50
0123456
Copper Area (square inches)
Pdiss - 1.35W
Pdiss - 2W
Pdiss - 3.4W


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