LS4201-6D 查看數據表（PDF） - Power-One Inc.

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LS4201-6D

100 Watt AC-DC Converters with PFC

Power-One Inc. 

Cassette Style

100 Watt AC-DC Converters

S Series PFC

E Inrush Current Limitation

The converters may be supplemented by an electronic cir-

cuit (option E, replacing the standard built-in NTC) to

achieve an enhanced inrush current limiting function.

Table 17: Inrush current characteristics with option E

Characteristics

Ui = 230 V AC

Iinr p

Peak inrush current

t inr

Inrush current duration

LS

typ

max

–

25.3

35

50

Unit

A

ms

11003

Vo+

Vo–

Load

Vo+

Vo–

Vo+

Vo–

Fig. 33

An example of poor wiring for connection in parallel

Control

FET

Rectifier

RS

RI

Ci

Fig. 31

Option E block diagram

Ii [A]

20

15

11002

Capacitor Ci

fully charged

10

Normal operation

(FET fully conducting)

5

0

–5

–10

tinr

t [ms]

0 10 20 30 40 50 60 70 80

Fig. 32

Inrush current with option E, Ui = 230 V AC, Po = Po nom

Precaution:

Subsequent switch-on cycles at start-up are limited to

max. 10 cycles during the first 20 seconds (cold unit)

and at continuing on/off (TC = 95°C) max. 1 cycle every

8 sec.

T Current Sharing

This option ensures that the output currents are approxi-

mately shared between all paralleled modules and in-

creases system reliability. To use this facility, simply inter-

connect the T pins of all modules and make sure, that

pin 14, the S– pin (S 4000) or the Vo1– pins (S 5000) are

also connected together. The load leads should have equal

length and cross section to ensure equal voltage drops. Not

more than 5 units should be connected in parallel. If output

voltage adjustment is requested we strongly recommend to

use the R-input instead of option P, as with option P the re-

quired setting accuracy is difficult to achieve. The output

voltages must be individually set prior to paralleling to

within a tolerance of 1...2% or the R pins should be con-

nected together.

N

Vo+ 2

S+

LS 4000 T

S–

P

Vo–

N

Vo+ 2

S+

LS 4000 T

S–

P

Vo–

11011

1

1

3

Load

1

3

1

max. 5 units connected in parallel

1 Leads should have equal length and cross sections and should

run in the same cable loom.

2 Diodes recommended in redundant operation only

3 DC common point

Fig. 34

Paralleling of single output units using option T with the

sense lines connected at the load

Module

Vo2+

Vo2–

T

Vo1+

Vo1–

Power bus

+

–

11037

Module

Vo2+

Vo2–

T

Vo1+

Vo1–

Load

max. 5 units in parallel connection

Fig. 35

Paralleling of double output units using option T with

Power bus.

Edition 01/01.2001

22/27

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