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8001FFE View Datasheet(PDF) - Sanken Electric co.,ltd.

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Description
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8001FFE
SANKEN
Sanken Electric co.,ltd. SANKEN
8001FFE Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
SI-8001FFE
DC-to-DC Step-Down Converter
Thermal Performance Characteristics
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:
where:
PD
= VO
I
O
⎜⎜⎝⎛
100
Hx
1⎟⎟⎠⎞
VF
I
O
⎜⎜⎝⎛1
VO
VIN
⎟⎟⎠⎞
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.
Power Dissipation versus Ambient Temperature
Shin Etsu G746 silicon grease
24
Infinite heat sink
22
TJ(max) = 150°C
20
Infinite heat sink
T (max) = 125°C
J
18
16
Al heat sink
200 mm × 200 mm × 2 mm
14
RθJA = 2.3°C/W
T (max) = 125°C
J
12
Al heat sink
100 mm × 200 mm × 2 mm
10
RTθ(JmA =ax5).2=°C12/W5°C
J
8
Al heat sink
75 mm × 75 mm × 2 mm
6
RθJA = 7.6°C/W
TJ(max) = 125°C
4
No heat sink
TJ(max) = 150°C
2
No heat sink
T (max) = 125°C
0
J
–40
–20
0
20
40
60
80
TA (°C)
6
5
Overtemperature
4
Protection:
Output Voltage versus 3
Junction Temperature
VIN = 15 V, IO = 10 mA
2
OTP On
1
OTP Off
0
0 20 40 60 80 100 120 140 160 180
TJ (°C)
Sanken Electric Co., Ltd.
5
3-6-3 Kitano, Niiza-shi, Saitama-ken
352-8666, Japan
Phone:+81-48-472-1111
http://www.sanken-ele.co.jp
 

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