參數(shù)資料
型號(hào)： RL622-150K
廠商： Microsemi Corporation
英文描述： EVALUATION KIT
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： RL622-150K
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RL622-150K-RC 功能描述:固定電感器 15uH 10% 2.52MHz 2.3A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類(lèi)型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
RL622-151K-RC 功能描述:固定電感器 150uH 10% 796KHz 750mA RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類(lèi)型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
RL622-152K-RC 功能描述:固定電感器 1.5mH 10% 252KHz 80mA RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類(lèi)型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
RL622-153K-RC 功能描述:固定電感器 15mH 10% 79KHz 40mA RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類(lèi)型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
RL622-180K-RC 功能描述:固定電感器 18uH 10% 2.52MHz 2.2A RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類(lèi)型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm
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