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参数资料
| 型号： | FXP1800-48G |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 2032.1 W AC-DC PWR FACTOR CORR MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-26 |
| 文件页数： | 3/15页 |
| 文件大小： | 679K |
| 代理商： | FXP1800-48G |
MCD10075 Rev. 1.2, 16-Mar-10
Page 11 of 15
www.power-one.com
FXP1500/1800 Front-Ends
& FXR-3 Power Shelves Data Sheet
SUB-D Output Connector Pinout and Signal Specification (Continued)
Output Connector
Description
Pin
Location
Type
Low level
High level
V max
I max
CLOCK, I
2C clock line
25
I
2C compatible signal
referenced to logic GND
5 V or 3.3 V logic
Auxiliary power +12 V
(Output 2)
26
Vo2+ Aux output, insulated from main output
Auxiliary power ground
(Output 2)
27
Vo2- Aux output, insulated from main output
Logic Gnd
28
Internally connected over 10 to Vo2-, Auxillary
GND. Wire separately from auxiliary and main output
GND to minimize noise and avoid voltage drops on
signal- and I
2C return. Leave open if not used.
Output margin PSU 1
29
Open or connected to V sense-
V sense- (+8 % Vo1) or V sense+ (-8 % Vo1)
60V
Output margin PSU 2
30
Open or connected to V sense-
V sense- (+8 % Vo1) or V sense+ (-8 % Vo1)
60V
Output margin PSU 3
31
Open or connected to V sense-
V sense- (+8 % Vo1) or V sense+ (-8 % Vo1)
60V
NC
32
NC
33
NC
34
NC
35
NC
36
NC
37
Synchronized start-up circuit for paralleling operation
The FXP1500-48G and FXP1800-48G power supplies exhibit an overcurrent hiccup behaviour. This means if either
of these supplies reaches an overcurrent limit, the output voltage will immediately turn OFF and after a delay turn
ON again. In parallel use, all power supplies have to start synchronized because of the internal hiccup behaviour.
Otherwise, the supply which has reached overcurrent first will go to hiccup; this will overload the other supplies,
which then will also go to hiccup. When the first supply has recovered from hiccup (hiccup dead time), the others
remain in hiccup. This will immediately drive the first one into hiccup once again. This means that without a start-up
circuit, a system with several power supplies can never recover from an overload condition or start-up into full load.
The following additional circuit, required to reach synchronized startup, is already implemented inside the
FXR-3-48G shelf.
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