參數(shù)資料
型號(hào)： FDS4953
廠商： Microsemi Corporation
英文描述： RES ARRAY 360 OHM 4TERM 2RES SMD
中文描述： 評(píng)估板
文件頁(yè)數(shù)： 12/18頁(yè)
文件大?。?/td> 339K
代理商： FDS4953
LXE1710 E
VALUATION
B
OARD
I
NDUCTOR
S
ELECTION
The output filter inductors are key elements in the
performance of the Class-D audio power amplifier.
Inductor selection criteria also involves tradeoffs
between performance (efficiency) and component
costs. The critical specifications for the inductor are
the DC resistance, DC current, and peak current
ratings. The inductors should be able to handle the
amplifier’s power as well as operate within its linear
region. Saturating the inductors could decrease
performance (increase THD) and even produce a
short, which may damage either the circuit or the
speaker.
Other variables when selecting an inductor depend on
the switching frequency of the designed amplifier. A
higher switching frequency implies that the corner
frequency of the LC filter is higher. With a higher f
C
,
the inductor value is smaller.
The amplifier’s application and design constraints will
help determine whether the inductors are selected for
size, power, or performance. Various inductors such
as those that are shielded may also have different EMI
effects and distortion performance.
The overall efficiency ( ) of the amplifier circuit is given
in the previous MOSFET section. The inductor’s
power loss contribution is a function of the inductor’s
DC resistance,
R
IND
.
U
SER
G
UIDE
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 12
Copyright
2000
Rev. 1.1, 2000-12-01
)
)(
2
)(
(
Loss
Power
Inductor
2
IND
IND
R
I
P
=
=
The LX1710 Evaluation board utilizes two 15μH radial
leaded R.F. inductors from Inductor Supply, Inc. (ISI).
When evaluating component options, inductors such
as from Coilcraft can be used for other performance /
price tradeoffs. See inductor table below.
P
IND
)(.
2
)(
5
=
The efficiency approximation can now be completed.
P
W
7
)
056
2
=
%
2
90
25
45
.
7
+
56
.
25
+
]
)
(
2
2
2
2
=
+
=
+
+
+
=
+
+
+
+
=
=
L
CROSS
P
IND
DS
L
CROSS
P
L
IND
PDS
R
NDS
R
L
IN
OUT
P
R
I
P
P
R
I
R
R
I
R
I
The efficiency is a function of the power and switching
loss in the MOSFETs and inductors.
Manufacturer
Part Number
Inductance
Q min
Test
Frequency
DC Resistance
DC Current
max (A
RMS
)
Self Resonant
Frequency min
(MHz)
ISI
RL622-150K
15.0
50
2.520MHz
56
2.50
12.0
Coilcraft
DO5022P-153HC
15.0
100kHz
32
4.4
20
Inductor Component Options
相關(guān)PDF資料
PDF描述
FDS6612A EVALUATION KIT
FDS4953 Dual P-Channel, Logic Level, PowerTrenchTM MOSFET
FDS6612A Single N-Channel, Logic Level, PowerTrenchTM MOSFET
FDS5170N7 60V N-Channel PowerTrench MOSFET
FDS5670 60V N-Channel PowerTrench⑩ MOSFET
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FDS4953_02 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual 30V P-Channel PowerTrench MOSFET
FDS5170N7 功能描述:MOSFET 60V N-Ch PowerTrench RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube
FDS5351 功能描述:MOSFET 60V N-Channel PowerTrench RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube
FDS5670 功能描述:MOSFET SO-8 N-CH 60V RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube
FDS5670 制造商:Fairchild Semiconductor Corporation 功能描述:MOSFET N SO-8
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