24IMS6-12-9 查看數據表（PDF） - Power-One Inc.

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24IMS6-12-9

6 Watt SMD and through hole DC/DC converters

Power-One Inc. 

Industrial Environment

DC/DC Converters < 40W

IMS6 Series

Thermal Considerations

If a converter, mounted on a PCB, is located in free, quasi-

stationary air (convection cooling) at the indicated maxi-

mum ambient temperature TA max (see table: Temperature

specifications) and is operated at its nominal input voltage

and output power, the case temperature TC measured at

the: Measuring point of case temperature TC (see: Me-

chanical Data) will approach the indicated value TC max af-

ter the warm-up phase. However, the relationship between

TA and TC depends heavily on the conditions of operation

and integration into a system. The thermal conditions are

influenced by input voltage, output current, airflow, tem-

perature of surrounding components and surfaces and the

properties of the printed circuit board. TA max is therefore

only an indicative value and under practical operating con-

ditions, the ambient temperature TA may be higher or lower

than this value.

Caution: The case temperature TC measured at the

Measuring point of case temperature TC (see: Mechani-

cal Data) may under no circumstances exceed the speci-

fied maximum value. The installer must ensure that un-

der all operating conditions TC remains within the limits

stated in the table Temperature specifications.

Output overvoltage protection

The outputs of the IMS 6 converters are protected against

overvoltages by Zener diodes. In the event of an overvolt-

age on the output, the unit will shut-down and attempt to

restart automatically. The main purpose of this feature is to

protect against possible overvoltages which could occur

due to a failure in the feedback control circuit. The units are

not designed to withstand external overvoltages applied to

the outputs.

Connection in series

The outputs of single or dual output units can be connected

in series without any precautions, taking into consideration

that the highest output voltage should remain below 60 V for

SELV operation.

Connection in parallel

The outputs of several units with equal nominal output volt-

age can be connected in parallel. Approximate current

sharing between 2 or several units is ensured by their load

dependent output characteristic.

Short Circuit Behaviour

The current limit characteristic shuts down the converter

whenever a short circuit is applied to its output. It acts self-

protecting and automatically recovers after removal of the

overload condition.

Typical Performance Curves

Uo [V]

5.25

05056

5.0

4.75

4.5

4.25

4.0

0

0.5

1.0

Io [A]

Fig. 12

Uo versus Io (typ) of single output units (example for

48IMS6-05-9

Uo1 + Uo2 [V]

31.5

05057

31

30.5

30

29.5

29

28.5

0

33 66

100 133 166 200 233 Io [mA]

Fig. 13

Uo versus Io (typ) of dual output units ( 15 V), with 30 V

load connected to Vo+ and Vo–.

Uo1 [V]

16.5

05058

Uo1, Uo2 [V]

12.8

05059

16

12.4

15.5

15

14.5

Io2 = 140 mA

Io2 = 14 mA

14

0 33 66 100 33 66 200 233 Io1 [mA]

Fig. 14

Cross load regulation of dual output units. Uo1 versus

Io1 (typ) for various Io2 (48IMS6-1515-9).

12

Uo2

Uo1

11.6

11.2

0

150

300

Io1

Io1 no

[%]

Fig. 15

Flexible load distribution on dual outputs (2 x 12 V) with

load variation from 0...150% of Po1 nom on output 1.

Output 2 loaded with 25% of Po2 nom.

Edition 1 06.00

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