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參數(shù)資料
| 型號(hào)： | FW300H1 |
| 廠商： | LINEAGE POWER LLC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 文件頁(yè)數(shù)： | 5/20頁(yè) |
| 文件大?。?/td> | 839K |
| 代理商： | FW300H1 |
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Lineage Power
13
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 24 Vdc Output; 250 W to 300 W
FW250H1 and FW300H1 Power Modules; dc-dc Converters:
Feature Descriptions (continued)
Forced Load Sharing (Parallel Operation)
(continued)
n
The parallel pins of all units must be connected
together. The paths of these connections should be
as direct as possible.
n
All remote-sense pins should be connected to the
power bus at the same point, i.e., connect all
SENSE(+) pins to the (+) side of the power bus at the
same point and all SENSE(–) pins to the (–) side of
the power bus at the same point. Close proximity and
directness are necessary for good noise immunity.
When not using the parallel feature, leave the
PARALLEL pin open.
8-581
Figure 19. Wiring Configuration for Redundant
Parallel Operation
Power Good Signal
The PWR GOOD pin provides an open-drain signal
(referenced to the SENSE(–) pin) that indicates the
operating state of the module. A low impedance
(<100
Ω) between PWR GOOD and SENSE(–) indi-
cates that the module is operating. A high impedance
(>1 M
Ω) between PWR GOOD and SENSE(–) indi-
cates that the module is off or has failed. The PWR
GOOD pin can be pulled up through a resistor to an
external voltage to facilitate sensing. This external volt-
age level must not exceed 40 V, and the current into
the PWR GOOD pin during the low-impedance state
should be limited to 1 mA maximum.
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation of the unit.
Heat-dissipating components inside the unit are ther-
mally coupled to the case. Heat is removed by conduc-
tion, convection, and radiation to the surrounding
environment. Proper cooling can be verified by mea-
suring the case temperature. Peak temperature occurs
at the position indicated in Figure 20.
8-1303
Note: Top view, measurements shown in millimeters and (inches).
Pin locations are for reference only.
Figure 20. Case Temperature Measurement
Location
VO(+)
PARALLEL
SENSE(+)
SENSE(–)
VO(–)
CASE
VI(+)
ON/OFF
VI(–)
VO(+)
PARALLEL
SENSE(+)
SENSE(–)
VO(–)
CASE
VI(+)
ON/OFF
VI(–)
CASE
SYNC IN
SYNC OUT
MEASURE CASE
TEMPERATURE HERE
ON/OFF
82.6
(3.25)
30.5
(1.20)
VI(+)
VI(–)
VO(+)
VO(–)
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