TAI-TECH
P1
Power Inductor
DFP252012TF-4R7M
ECN HISTORY LIST
REV
DATE
DESCRIPTION
APPROVED
CHECKED
DRAWN
1.0
17/05/18
新 發 行
羅宜春
梁周虎
張光
備
註
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TAI-TECH
P2
Power Inductor
DFP252012TF-4R7M
1. Features
1. This specification applies Low Profile Power Inductors.
2. 100% Lead(Pb) & Halogen-Free and RoHS compliant.
2. Dimension
Halogen
Pb
Halogen-free
Pb-free
B
A
D
E
D
C
Series
A(mm)
B(mm)
C(mm)
D(mm)
E(mm)
DFP252012TV
2.5 -0.1/+0.2
2.0 -0.05/+0.35
1.2Max
0.85 ref. 0.80 ref.
Units: mm
3. Part Numbering
DFP
252012 TF
A
B
-
4R7
M
D
E
C
A: Series
B: Dimension
C: Lead Free
D: Inductance
E: Inductance Tolerance
Material
4R7=4.70uH
M=±20%
4. Specification
TAI-TECH
Part Number
DFP252012TF-4R7M
Inductanc Toleranc
e
e
(uH)
(%)
4.70
Test
Frequency
(Hz)
DCR
DCR
I sat
I sat
I rms
(Ω) typ. (Ω) Max. (A) typ. (A) Max. (A) typ
0.1V/1M
±20%
0.230
0.276
1.90
Note:
Isat:Based on inductance change (△L/L0:≦30%)@ ambient temp. 25℃
Irms:Based on temperature rise (△T:40℃.)Max
DFP252012TF-4R7M
DFP252012BF-4R7
8
Inductance(uH)
6
4
2
0
0
0.5
1
DCcurrent(A)
1.5
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2
1.60
1.50
TAI-TECH
P3
5. Material List
No.
Description Specification
a.
Core
Ferrite Core
b.
Wire
Enameled Copper Wire
c
Glue
Epoxy with magnetic powder
d
Terminal
Ag/Ni/Sn
Appearance of exposed wire tolerance limit:
1. Width direction(dimension a):Acceptable when a≦w/2
Nonconforming when a>w/2
2. Length direction(dimension b):Dimension b is not specified.
3. The total area of exposed wire occurring to each sides is
not greater than 50% of coating resin area, and is acceptable.
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P4
6. Reliability and Test Condition
Item
Performance
Operating temperature
-40~+125℃ (Including self - temperature rise)
Storage temperature
-40~+125℃ (on board)
Test Condition
Electrical Performance Test
HP4284A,CH11025,CH3302,CH1320,CH1320S
Inductance
Refer to standard electrical characteristics list.
DCR
LCR Meter.
CH16502,Agilent33420A Micro-Ohm Meter.
Saturation DC Current (Isat) will cause L0
Saturation Current (Isat)
△L≦30% typical.
to drop △L(%)(keep quickly).
Heat Rated Current (Irms) will cause the coil temperature rise
△T(℃) without core loss.
Heat Rated Current (Irms)
Approximately △T≦40℃
1.Applied the allowed DC current(keep 1 min.).
2.Temperature measured by digital surface thermometer
Reliability Test
Preconditioning: Run through IR reflow for 2 times.( IPC/JEDEC
J-STD-020DClassification Reflow Profiles)
Temperature: 125±2℃
Applied current:rated current
Duration:1000±12hrs
Measured at room temperature after placing for 24±2 hrs
Life Test
Preconditioning: Run through IR reflow for 2 times.( IPC/JEDEC
J-STD-020DClassification Reflow Profiles
Humidity:85±2﹪R.H,
Temperature:85℃±2℃
Duration:1000hrs Min. with 100% rated current
Measured at room temperature after placing for 24±2 hrs
Load Humidity
Moisture Resistance
Appearance:No damage.
Inductance:within±10% of initial value
Q:Shall not exceed the specification value.
RDC:within ±15% of initial value and shall not
exceed the specification value
Preconditioning: Run through IR reflow for 2 times.( IPC/JEDEC
J-STD-020DClassification Reflow
Profiles
1. Baked at50℃ for 25hrs, measured at room temperature after
placing for 4 hrs.
2. Raise temperature to 65±2℃ 90-100%RH in 2.5hrs, and
keep 3 hours, cool down to 25℃ in 2.5hrs.
3. Raise temperature to 65±2℃ 90-100%RH in 2.5hrs, and
keep 3 hours, cool down to 25℃ in
2.5hrs,keep at 25℃ for 2 hrs then keep at -10℃ for 3 hrs
4. Keep at 25℃ 80-100%RH for 15min and vibrate at the
frequency of 10 to 55 Hz to 10 Hz, measure at
room temperature after placing for 1~2 hrs.
Preconditioning: Run through IR reflow for 2 times.( IPC/JEDEC
J-STD-020DClassification
Reflow Profiles
Condition for 1 cycle
Step1:-40±2℃ 30±5min
Step2:25±2℃ ≦0.5min
Step3:125±2℃ 30±5min
Number of cycles: 500
Measured at room temperature after placing for 24±2 hrs
Thermal
shock
Oscillation Frequency: 10~2K~10Hz for 20 minutes
Equipment: Vibration checker
Total Amplitude:1.52mm±10%
Testing Time : 12 hours(20 minutes, 12 cycles each of 3
orientations)。
Vibration
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Item
P5
Performance
Shock
Bending
Soderability
Appearance:No damage.
Inductance:within±10% of initial value
Q:Shall not exceed the specification value.
RDC:within ±15% of initial value and shall not
exceed the specification value
More than 95% of the terminal electrode should
be covered with solder。
Test Condition
Type
Peak value
(g’s)
Normal
duration
(D) (ms)
Wave form
Velocity
change
(Vi)ft/sec
SMD
50
11
Half-sine
11.3
Lead
50
11
Half-sine
11.3
shocks in each direction along 3 perpendicular axes.
Shall be mounted on a FR4 substrate of the
following dimensions: >=0805:40x100x1.2mm
=0805inch(2012mm):1.2mm
0805
inch(2012mm):1kg ,
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