IMX4 datasheet(4/12 Pages) BEL

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IMX4 Series Data Sheet

4 Watt DC-DC Converters

BCD20006-G Rev AE, 16-Sep-2015

Page 4 of 12

MELCHER

The Power Partners.

Table 3: Input electrolytic capacitors

Model

20IMX4

40IMX4

70IMX4

C i

100

µF

330

µF

50 V

100 V

200 V

Electrical Input Data

General conditions: TA = 25 °C, unless TC is specified.

Table 2: Input Data

Input

5I MX4

20IMX4

40IMX4

70IMX4

Unit

Characteristics

Conditions

min

typ max min typ max min typ max min typ max

Input voltage range

TC min to TC max

4.7

5.0 16.8 8.4

36 16.8 2

121

VDC

Vi nom

Nominal input voltage

Io = 0 to Io nom

5.0

Vi sur

Repetitive surge voltage abs. max input (3 s)

100

150

tstart-up Converter start-up time1 Worst case condition at

0.25 0.5

0.3

0.6

Vi min and full load

trise

Rise time 1

Vi nom

resistive load

Io nom

capacitive load

Ii o

No-load input current

Io = 0, Vi min to Vi max

C i

Input capacitance

0.54

0.3

0.15

µF

Iinr p

Inrush peak current

Vi = Vi nom 3

3.8

3.7

4.2

5.6

Switching frequency

Vi min to Vi max, Io = 0 to Io nom

400

kHz

Ii rr

Reflected ripple current

Io = 0 to Io nom

100

mApp

vi RFI

Input RFI level

EN 55011/55022 4

Class

conducted

Measured with a resistive or max. admissible capacitive load; see fig. 5

Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V

Source impedance according to ETS 300132-2, version 4.3.

External capacitors required according to table 3.

Fig. 5

Converter start-up and rise time

Inrush Current

The inrush current has been kept as low as possible by

choosing a very small input capacitance. A series resistor may

be inserted in the input line to further limit this current.

Fig. 6

Typ. inrush current at Vi nom, Po nom versus time measured

according to ETS 300132-2, version 4.3 (40IMX4).

Fig. 7

Input capacitors

µs

04034a

Start-up

Filter to Comply with EN 55011/55022

Electromagnetic emission requirements according to table

Electrical Input Data can be achieved by adding an external

capacitor as close as possible to the input terminals (see fig. 7

and table 3).

Vi+

Vi–

04035b

Vo nom

tstartup

trise

04008b

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