It is recommended that the temperature of the component does not exceed +125 °C under worst
case conditions
8,0
u
0,3
Ambient Temperature (refering to
I
R
)
Operating Temperature
Storage Conditions (in original
packaging)
Moisture Sensitive Level (MSL)
Scale - 3:1
-40 °C up to +85 °C
-40 °C up to +125 °C
< 40 °C ; < 75 % RH
1
Test conditions of Electrical Properties: +20 °C, 33 % RH if not specified differently
Product Marking:
Start of Winding
Marking
•
472 (Inductance Code)
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
CREATED
CHECKED
GENERAL TOLERANCE
PROJECTION
METHOD
KaS
DESCRIPTION
ChriB
DIN ISO 2768-1m
WE-LQS SMD Semi-Shielded
Power Inductor
SIZE
REVISION
STATUS
ORDER CODE
74404086472
DATE (YYYY-MM-DD)
BUSINESS UNIT
PAGE
8065
001.001
Valid
2018-06-05
eiSos
1/6
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
Typical Inductance vs. Current Characteristics:
5.000.0
Typical Impedance Characteristics:
1000000
4.500.0
100000
4.000.0
3.500.0
10000
Inductance [µH]
3.000.0
Impedance [Ω]
2.500.0
1000
2.000.0
100
1.500.0
10
1.000.0
500.0
0.0
0.0
0.1
0.2
0.3
Current [A]
0.4
0.5
0.6
1
0.01
0.1
1
Frequency [MHz]
Z
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
CREATED
CHECKED
GENERAL TOLERANCE
PROJECTION
METHOD
10
100
KaS
DESCRIPTION
ChriB
DIN ISO 2768-1m
WE-LQS SMD Semi-Shielded
Power Inductor
SIZE
REVISION
STATUS
ORDER CODE
74404086472
DATE (YYYY-MM-DD)
BUSINESS UNIT
PAGE
8065
001.001
Valid
2018-06-05
eiSos
2/6
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
Packaging Specification - Tape and Reel: [mm]
P0
D0
P2
E1
T
W1
close to center
B
D
W3
F
B0
E2
W
C
top cover
tape
A0
P1
K0
T2
T1
W2
detail B
End
Feeding direction
Start
Carrier tape
Cover tape
B
Cover Tape
Chip Cavity
Sprocket Hole
No Component
min. 160mm
Components
No Component
min. 100mm
Cover Tape
min. 400mm
Embossment
packaging is reffered to the international standard IEC 60286-3:2013
tolerance
size
8065
A0
typ.
8.30
B0
typ.
8.30
W
±0,3
16.00
P1
±0,1
12.00
T
max.
0.60
T1
min.
0.10
T2
ref.
7.40
K0
typ.
6.70
D0
+0,1
1.50
D1
min.
1.50
E1
±0,1
1.75
E2
min.
14.25
F
±0,05
7.50
P0
±0,1
4.00
P2
±0,05
2.00
Tape Type
Polystyrene
VPE / packaging unit
pcs.
700
tolerance
Tape width
16 mm
A
±2,0
330.00
B
min.
1.50
C
±0,8
13.00
D
min.
20.20
N
N
min.
60.00
W1
+1,5
16.40
A
W2
max.
22.40
W3
min.
15.90
W3
max.
19.40
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
CREATED
CHECKED
GENERAL TOLERANCE
PROJECTION
METHOD
KaS
DESCRIPTION
ChriB
DIN ISO 2768-1m
165° - 180°
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
WE-LQS SMD Semi-Shielded
Power Inductor
SIZE
REVISION
STATUS
ORDER CODE
74404086472
DATE (YYYY-MM-DD)
BUSINESS UNIT
PAGE
Pull-of force
Tape width
16 mm
0,1 N - 1,3 N
8065
001.001
Valid
2018-06-05
eiSos
3/6
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
Classification Reflow Profile for SMT components:
Classification Reflow Soldering Profile:
Profile Feature
Preheat Temperature Min
Preheat Temperature Max
Value
T
s min
150 °C
T
s max
200 °C
t
s
T
L
t
L
T
p
t
p
60 - 120 seconds
3 °C/ second max.
217 °C
60 - 150 seconds
see table below
20 - 30 seconds
6 °C/ second max.
8 minutes max.
T
p
Max. Ramp Up Rate
Max. Ramp Down Rate
T
L
T
s max
t
L
t
p
T
C
–5°C
Preheat Time t
s
from T
s min
to T
s max
Ramp-up Rate (T
L
to T
P
)
Liquidous Temperature
Time t
L
maintained above T
L
Peak package body temperature
Time within 5°C of actual peak temperaure
Ramp-down Rate (T
L
to T
P
)
Time 25°C to peak temperature
refer to IPC/ JEDEC J-STD-020E
Temperature
Preheat Area
T
s min
t
S
Package Classification Reflow Temperature:
Properties
Volume mm³
<350
260 °C
250 °C
Volume mm³
350-2000
260 °C
250 °C
245 °C
Volume mm³
>2000
260 °C
245 °C
245 °C
25
Time 25°C to Peak
PB-Free Assembly | Package Thickness < 1.6 mm
PB-Free Assembly | Package Thickness ≥ 2.5 mm
refer to IPC/ JEDEC J-STD-020E
PB-Free Assembly | Package Thickness 1.6 mm - 2.5 mm
260 °C
Time
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
CREATED
CHECKED
GENERAL TOLERANCE
PROJECTION
METHOD
KaS
DESCRIPTION
ChriB
DIN ISO 2768-1m
WE-LQS SMD Semi-Shielded
Power Inductor
SIZE
REVISION
STATUS
ORDER CODE
74404086472
DATE (YYYY-MM-DD)
BUSINESS UNIT
PAGE
8065
001.001
Valid
2018-06-05
eiSos
4/6
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
Cautions and Warnings:
The following conditions apply to all goods within the product series of WE-LQS of Würth
Elektronik eiSos GmbH & Co. KG:
General:
• This electronic component is designed and developed with the intention for use in general electronic equipment.
• Würth Elektronik must be asked for a written approval (following the certain PPAP level procedure) before incorporating the components
into any equipment in the field such as military, aerospace, aviation, nuclear control, submarine, transportation, (automotive control,
train control, ship control), transportation signal, disaster prevention, medical, public information network etc. where higher safety and
reliability are especially required and/or if there is possibility of direct damage or injury to human body.
• In addition, even electronic components in general electronic equipment require a sufficient reliability evaluation-check for the safety,
when used in electrical circuits that require high safety, reliability functions or performance, prior to usage.
• The electronic component is designed and manufactured to be used within the datasheets’ specified values. The usage and operation of
the product within ambient conditions, which probably dissolve or harm the wire isolation, has to be avoided.
• The responsibility for the function of the application of the customer specific products and use in a particular customer design is always
the full and autonomous responsibility of the customer. All technical specification for standard products also apply to customer specific
products.
• Direct mechanical impact to the product shall be prevented as the ferrite material of the core could flake or in the worst case it could
break.
• Würth Elektronik products are qualified according to international standards, which are listed in each product reliability report. Würth
Elektronik does not guarantee any customer qualified product characteristic, beyond Würth Elektronik specifications, for its validity and
sustainability over time.
• Limiting factors for the storage stability of electronic components are material characteristics and a solderability decrease of the
terminations. Therefore all products shall be used within the period of 12 month based on the day of shipment.
• Do not expose the components into direct sunlight.
• The storage condition in the original packaging refered to DIN EN 61760-2.
Potting:
• If the product is potted in the costumer applications, the potting material might shrink during and after hardening. The product is
exposed to the pressure of the potting material with the effect that the core, wire and termination is possibly damaged by this pressure
and so the electrical as well as the mechanical characteristics are endangered to be affected. After the potting material is cured, the
core, wire and termination of the product require the inspection for any reduced electrical or mechanical functions or potential
destructions.
Handling:
• Violation of the technical product specifications such as exceeding the nominal rated current will void the warranty.
• The general and product specific cautions comply with the state of the scientific and technical knowledge and are believed to be
accurate and reliable; however, no responsibility is assumed for inaccuracies or incompleteness.
Product specific:
Soldering:
• The solder profile must comply with the Würth Elektronik technical soldering specification, other profiles will void the warranty.
• All other soldering methods are at the customer’s own risk.
Cleaning and Washing:
• Washing agents used during the production to clean the customer application might damage or change the characteristics of the wire
insulation, the marking or the plating. The washing agent could have a negative effect on the long term functionality of the product.
Storage Conditions:
Würth Elektronik eiSos GmbH & Co. KG
EMC & Inductive Solutions
Max-Eyth-Str. 1
74638 Waldenburg
Germany
Tel. +49 (0) 79 42 945 - 0
www.we-online.com
eiSos@we-online.com
CREATED
CHECKED
GENERAL TOLERANCE
PROJECTION
METHOD
KaS
DESCRIPTION
ChriB
DIN ISO 2768-1m
WE-LQS SMD Semi-Shielded
Power Inductor
SIZE
REVISION
STATUS
ORDER CODE
74404086472
DATE (YYYY-MM-DD)
BUSINESS UNIT
PAGE
8065
001.001
Valid
2018-06-05
eiSos
5/6
This electronic component has been designed and developed for usage in general electronic equipment only. This product is not authorized for use in equipment where a higher safety standard and reliability standard is especially required or where a failure of the product is reasonably expected to cause severe personal injury or death, unless the parties have executed an agreement specifically governing such use. Moreover Würth Elektronik eiSos GmbH
& Co KG products are neither designed nor intended for use in areas such as military, aerospace, aviation, nuclear control, submarine, transportation (automotive control, train control, ship control), transportation signal, disaster prevention, medical, public information network etc.. Würth Elektronik eiSos GmbH & Co KG must be informed about the intent of such usage before the design-in stage. In addition, sufficient reliability evaluation checks for safety
must be performed on every electronic component which is used in electrical circuits that require high safety and reliability functions or performance.
C++ 属于面向对象的编程语言，OOP的思想不必多说，特别对于复杂的软件工程来说，利用OOP绝对是事半功倍，相对于传统的C来说； 当然用C来写单片机程序无可厚非，已经延续了一个传统，从大学时学的开始到工作岗位，好多人都是一直用C来做，但是既然Keil支持C++编译， 可以用C++来编写你的代码，可以利用高级语言来结构化，清晰化你的程序，为嘛不用呢！哈哈，个人看法！下面进入正题： C+...[详细]
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