LS4000 datasheet(10/27 Pages) POWER-ONE

10 / 27 page

Cassette Style

100 Watt AC-DC Converters

S Series PFC

Edition 01/01.2001

10/27

Switching Frequency versus Load

0.2

0.4

0.6

0.8

Frequency [kHz]

load [Io/Io nom]

1.2

05008

Fig. 13

Switching frequency versus load. (The boost converter at

the input stage has a ﬁxed frequency of 100 kHz)

0.2

0.4

0.6

0.8

Io2/Io2 nom

13.5

14.5

15.5

[V] Uo2

Io1 = 100%

Io1 =50%

Io1 =10%

16.5

05084

Io2/Io2 nom

10.5

11.5

12.0

12.5

[V] Uo2

Io1 =100%

Io1 =50%

Io1 =10%

0.2

0.4

0.6

0.8

05083

Fig. 10

LS 5320:

DUo2 (typ.) vs. Io2 with different Io1.

Fig. 11

LS 5540:

DUo2 (typ.) vs. Io2 with different Io1.

00.2

0.4

0.6

0.8

Io2/Io2 nom

[V] Uo2

Io1 = 100%

Io1 =50%

Io1 =10%

05085

Fig. 12

LS 5660:

DUo2 (typ.) vs. Io2 with different Io1.

Uo2d

Uo1d

<10

µs

<10

µs

Uo1

Uo2

Io1/Io1 nom

0.5

Io2/Io2 nom

05005

Fig. 14

Typical dynamic load regulation of Uo1 and Uo2.

Dynamic Load Regulation

Hold-up Time versus Output Power

0.2

0.4

0.6

0.8

160

100

120

140

time [ms]

180

Io /Io nom

05013

Fig. 15

Hold-up time th versus output power.

Efﬁciency versus Load

0.2

0.4

0.6

0.8

0.90

0.30

0.40

0.50

0.60

0.70

0.80

Efficiency

Io/Io nom

Ui = 230 V AC

Ui = 85 V AC

05014

Fig. 16

Efﬁciency versus load at Ui; 230 V AC and 85 V AC

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