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SI-8001FFE 数据表(PDF) 5 Page - Sanken electric

部件名 SI-8001FFE
功能描述  DC-to-DC Step-Down Converter
Download  9 Pages
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制造商  SANKEN [Sanken electric]
网页  http://www.sanken-ele.co.jp/en
标志 SANKEN - Sanken electric

SI-8001FFE 数据表(HTML) 5 Page - Sanken electric

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5
SANKEN ELECTRIC CO., LTD.
DC-to-DC Step-Down Converter
SI-8001FFE
27469.057
Thermal Performance Characteristics
24
22
20
18
16
14
12
10
8
6
4
2
0
–40
–20
0
20
40
60
80
Power Dissipation versus Ambient Temperature
Shin Etsu G746 silicon grease
TA (°C)
No heat sink
T
J(max) = 125°C
No heat sink
T
J(max) = 150°C
Al heat sink
75 mm × 75 mm × 2 mm
R
θJA = 7.6°C/W
T
J(max) = 125°C
Al heat sink
100 mm × 200 mm × 2 mm
R
θJA = 5.2°C/W
T
J(max) = 125°C
Al heat sink
200 mm × 200 mm × 2 mm
R
θJA = 2.3°C/W
T
J(max) = 125°C
Infinite heat sink
T
J(max) = 150°C
Infinite heat sink
T
J(max) = 125°C
6
5
4
3
2
1
0
0
20
40
60
80
100 120 140
180
160
TJ (°C)
Overtemperature
Protection:
Output Voltage versus
Junction Temperature
V
IN = 15 V, IO = 10 mA
OTP On
OTP Off
The application must be designed to ensure that the TJ(max)
of the device is not exceeded during operation. To do so, it is
necessary to determine values for maximum power dissipation,
PD(max), and ambient temperature, TA(max).
PD can be calculated from input values:
⎟⎟
⎜⎜
⎟⎟
⎜⎜
=
IN
O
O
F
x
O
O
D
V
V
I
V
I
V
P
1
1
100
where:
VO is output voltage in V,
VIN is input supply voltage in V,
IO is output current in A,
ηx is IC efficiency in percent (varies with VIN and IO; refer to
efficiency performance curves for value), and
VF is forward voltage for the input diode, Di. In these tests, the
Sanken RK46 was used, at 0.5 V and IO = 3.5 A. For application
design, obtain thermal data from the datasheet for the diode.
PD is substantially affected by the heat conductance properties of
the application, in particular any heatsink connected to the device
radiation fin. The relationships of PD, TA, and heatsink type is
represented in the Power Dissipation chart.
Because the heat dissipation capacity of the heatsink depends
substantively on how it is used in the actual application, thermal
characteristics of the application must be confirmed by testing.
The internal overtemperature protection circuit may enable when
TJ ≥ 130°C.


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