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參數(shù)資料
| 型號： | LW025A |
| 英文描述： | LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W |
| 中文描述： | LW025單輸出系列電源模塊36伏到75伏直流電輸入25瓦 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大小： | 477K |
| 代理商： | LW025A |
10
Tyco Electronics Corp.
Advance Data Sheet
March 1999
36 Vdc to 75 Vdc Inputs; 25 W
LW025 Single-Output-Series Power Modules:
Feature Descriptions
(continued)
Synchronization (Optional)
The unit is capable of external synchronization from an
independent time base with a switching rate of
256 kHz. The amplitude of the synchronizing pulse
train is TTL compatible and the duty cycle ranges
between 40% and 60%. Synchronization is referenced
to V
I
(+).
Thermal Considerations
Introduction
The LW025 Single-Output-Series Power Modules oper-
ate in a variety of thermal environments; however, suffi-
cient cooling should be provided to help ensure reliable
operation of the unit. Heat-dissipating components
inside the unit are thermally coupled to the case. Heat
is removed by conduction, convection, and radiation to
the surrounding environment. Proper cooling can be
verified by measuring the case temperature. Peak case
temperature (T
C
) occurs at the position indicated in Fig-
ure 14.
8-1265(C).c
Note: Dimensions are in millimeters and (inches). Pin locations are
for reference only.
Figure 14. Case Temperature Measurement
Location
Note that the view in Figure 14 is of the metal surface
of the module—the pin locations shown are for refer-
ence. The temperature at this location should not
exceed the maximum case temperature indicated in
the derating curve shown in Figure 16. The output
power of the module should not exceed the rated
power for the module as listed in the Ordering Informa-
tion table.
Heat Transfer
Increasing airflow over the module enhances the heat
transfer via convection. Figure 16 shows the maximum
power that can be dissipated by the module without
exceeding the maximum case temperature versus local
ambient temperature (T
A
) for natural convection
through 3.0 ms
–1
(600 ft./min.).
Systems in which these power modules may be used
typically generate natural convection airflow rates of
0.3 ms
–1
(60 ft./min.) due to other heat-dissipating com-
ponents in the system. Therefore, the natural convec-
tion condition represents airflow rates of up to 0.3 ms
–1
(60 ft./min.). Use of Figure 16 is shown in the following
example.
Example
What is the minimum airflow necessary for a LW025A
operating at V
I
= 75 V, an output current of 3.5 A, and a
maximum ambient temperature of 85 °C
Solution
Given: V
I
= 75 V, I
O
= 3.5 A, T
A
= 85 °C
Determine P
D
(Figure 18): P
D
= 4.5 W
Determine airflow (Figure 16): v = 1.0 ms
–1
(200 ft./min.)
19.6
(0.77)
TRIM
-
+
OUT
ON/OFF
NC
-
IN
+
LW025A871
DC-DC CONVERTER
IN:DC 36-75V, 1.20A
OUT:DC 5.0V, 5.0A
MADE IN USA
CASE PIN (OPTIONAL)
26.9
(1.06)
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| LW025F | 制造商:MA-COM 制造商全稱:M/A-COM Technology Solutions, Inc. 功能描述:LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W |
| LW025F8 | 功能描述:CONVERTER DC/DC 3.3V 16.5W OUT RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:LW025 設(shè)計資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?42V 電壓 - 輸入（最大）:60V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:150W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:9-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包裝:散裝 工作溫度:-55°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
| LW025F871 | 功能描述:CONVERTER DC/DC 3.3V 16.5W OUT RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:LW025 設(shè)計資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最小）:42V 電壓 - 輸入（最大）:60V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:150W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:9-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包裝:散裝 工作溫度:-55°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
| LW025G | 功能描述:CONVERTER DC/DC 2.5V 12.5W OUT RoHS:否 類別:電源 - 板載 >> DC DC Converters 系列:LW025 設(shè)計資源:VI-200, VI-J00 Design Guide, Appl Manual 標(biāo)準(zhǔn)包裝:1 系列:* 類型:隔離 輸出數(shù):1 電壓 - 輸入（最?。?42V 電壓 - 輸入（最大）:60V Voltage - Output 1:15V Voltage - Output 2:- Voltage - Output 3:- 電流 - 輸出（最大）:* 電源（瓦） - 制造商系列:150W 電壓 - 隔離:* 特點:* 安裝類型:通孔 封裝/外殼:9-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包裝:散裝 工作溫度:-55°C ~ 85°C 效率:* 電源（瓦特）- 最大:* |
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