LS4899-7B1 데이터 시트보기 (PDF) - Power-One Inc.

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LS4899-7B1

100 Watt AC-DC Converters with PFC

Power-One Inc. 

Cassette Style

100 Watt AC-DC Converters

S Series PFC

Electrical Input Data

General Conditions

– TA = 25°C, unless TC is specified.

– Pin 18 connected to pin 14, Uo adjusted to Uo nom (option P); R input not connected.

– Sense line pins S+ and S– connected to Vo+ and Vo– respectively.

Table 2: Input data

Input

LS

Characteristics

Conditions

min typ max

Unit

Ui

Ui nom

Ii

P i0

P i inh

Ri

R NTC

Ci

Ui RFI

Operating Input voltage

Nominal Input voltage

Input current

No-load input power

Idle input power

Input resistance

NTC resistance 2

Input capacitance

Conducted input RFI

Radiated input RFI

Io = 0...Io nom

TC min...TC max

Ui nom, Io nom 1

Ui min…Ui max

unit inhibited

TC = 25°C

EN 55022

Ui nom, Io nom

85

255

230

0.55

9.0 10

3.5 5

480

3200 4000

80 100 120

B

B

V AC 3,4

Arms

W

mΩ

µF

Ui abs Input voltage limits

without damage

–400

–400

400

V DC

400

Vp

1 With double output modules, both outputs loaded with Io nom.

2 Valid for -7 versions with NTC, (-9 versions exclude the NTC). Initial switch-on cycle. Subsequent switch-on/off cycles increase the in-

rush current peak value.

3 AC frequency range 47...63 Hz.

4 For DC-input please ask your local Power-One partner.

Input Fuse

A fuse mounted inside the converter protects the module

against severe defects. (If operated from a DC-source this

fuse may not fully protect the module when the input volt-

age exceeds 200 V DC! In applications where the convert-

ers operate at source voltages above 200 V DC an external

fuse or a circuit breaker at system level should be installed!)

Table 3: Fuse Specification

Module

LS 1

Fuse type

slow-blow

Fuse rating

SP T

4 A, 250 V

1 Fuse size 5 × 20 mm

Input Under-/Overvoltage Lock-out

If the input voltage remains below approx. 65 V AC or ex-

ceeds approx. 280 V AC an internally generated inhibit sig-

nal disables the output(s). When checking this function the

absolute maximum input voltage rating Ui abs should be

considered! Between Ui min and the undervoltage lock-out

level the output voltage may be below the value defined in

table: Output data (see: Technical Information: Measuring

and Testing).

Input Transient Protection

A VDR together with the input fuse and a symmetrical input

filter form an effective protection against high input tran-

sient voltages.

Reverse Polarity Protection

Should the input voltage to the unit be supplied from a DC

source the built-in bridge rectifier provides reverse polarity

protection. (For DC-input operation, please consult your lo-

cal Power-One partner.)

Inrush Current Limitation

The modules of the versions -7, incorporate an NTC resis-

tor in the input circuitry which – at initial turn on – reduces

the peak inrush current value by a factor of 5...10 to protect

connectors and switching devices from damage. Subse-

quent switch-on cycles within short periods will cause an

increase of the peak inrush current value due to the warm-

ing-up of the NTC resistor. See also: E option.

Inrush Current Peak Value

The inrush current peak value (initial switch-on cycle) can

be determined by following calculation:

Iinr

p

=

––––U–i–rm–s–•––√2––––––

(Rs ext + Ri + RNTC)

04001

Rs ext Iinr p

Ri

RNTC

Ui rms

Ci

Fig. 3

Equivalent circuit diagram for input impedance.

Edition 01/01.2001

4/27

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