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參數(shù)資料
| 型號： | DVHF-THERMAL |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 8K |
| 代理商： | DVHF-THERMAL |
Thermal Information for DVHF2805S/DVHF2800D/DVHF2800T
The DVHF DC/DC converters utilize hybrid technology. All the power semiconductor
chips such as linear regulator, MOSFET, and Schottky diode are attached to an Alumina
substrate and the substrate is then attached to the metal case which houses the DC/DC
converter. The power transformer however is directly mounted to the metal case through
a thermally conductive epoxy preform. Table 2.1 shows the maximum junction
temperature rise (
T
JC
) at full load operation of all the power components referenced to
the outside of the base plate of the metal case. The case-ambient thermal resistance
(
θ
CA
)of the metal case between the base plate of the metal case and ambient is also listed
in the table.
A simplified and conservative way to calculate the worse case junction temperature of all
the power components is as follows:
1) Measure the worse case input power (Pi) and output power (Po) of the DC/DC
converter according to the system requirement and calculate the total power
dissipation (Pd) equal to Pi-Po.
2) If no additional heatsink is attached to the converter, the case temperature of the base
plate of the metal case (T
C
) is equal to Pd*
θ
CA
+ T
A
where T
A
is the ambient
temperature and the value of
θ
CA
comes from the table. If any additional heatsink is
attached to the converter, the new effective
θ
CA
needs to be used.
3) The worse case junction temperature (T
J
) of all the power components is then equal to
Tc +
T
JC
where the value of
T
JC
is from Table 2.1.
The maximum junction temperature of all the power components are rated at 175
°
C.
Additional heatsink is always recommended in order to maintain a low junction
temperature of the power components so that a higher reliability number can be achieved.
Table 2.1 Thermal Data for DVHF DC/DC Converters
T
JC
of Linear Regulator
12
°
C
T
JC
of MOSFET
7
°
C
T
JC
of Schottky Diode
9
°
C
T
JC
of Power Transformer
12
°
C
θ
CA
, Case to Ambient Thermal Resistance
25
°
C/W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DVHF2805D | Standalone Converters - Hybrid Technology. Hermetic Packaging |
| DVHF2805S | Standalone Converters - Hybrid Technology. Hermetic Packaging |
| DVHF2812D | Standalone Converters - Hybrid Technology. Hermetic Packaging |
| DVHF2812S | Standalone Converters - Hybrid Technology. Hermetic Packaging |
| DVHF2815D | Standalone Converters - Hybrid Technology. Hermetic Packaging |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DVHSP | 制造商:Middle Atlantic Products 功能描述: |
| DVHV2800D | 制造商:DELTA 制造商全稱:Delta Electronics, Inc. 功能描述:HIGH RELIABILITY HYBRID DC-DC CONVERTERS |
| DVHV2800S | 制造商:DELTA 制造商全稱:Delta Electronics, Inc. 功能描述:HIGH RELIABILITY HYBRID DC-DC CONVERTERS |
| DVHV2805D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Standalone Converters - Hybrid Technology. Hermetic Packaging |
| DVHV2805D/ES-XXX | 制造商:DELTA 制造商全稱:Delta Electronics, Inc. 功能描述:HIGH RELIABILITY HYBRID DC-DC CONVERTERS |
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