Functional Description

The IMS 30 series of DC-DC converters are magnetic feed-

back controlled forward converters using current mode

PWM (Pulse Width Modulation).

This product range features synchronous rectifiers deliver-

ing in very high efficiency. The output voltage of these ver-

sions can be adjusted via the Trim input. The Trim input is

referenced to the secondary side and allows for program-

ming of the output voltage in the range of approximately 90

to 110% of

The voltage regulation is achieved with a magnetic feed-

back circuit providing excellent line and load regulation.

Current limitation is provided by the primary circuit, thus

limiting the total output power to approx. 130% of

(see:

Type Survey). The shut down input allows remote

converter on/off.

Overtemperature protection will shut down the unit in ex-

cessive overload conditions with automatic restart.

Fig. 1

Block diagram (-0503, -0302 Outputs )

PWM

4n7F

1500 V

17

1

2

4

11

15

Vi+

SD

PUL

i

Vi –

Uo2+

Com

Trim

3

W

Type Key

48 IMS 30 - 0503 -9 G i

Input voltage range

....................................

48

Series ...................................................................... IMS 30

Output voltage type output .................... ( 5.1 and 3.3Vout)

Operating ambient temperature range

–40...71°C .................................................. -9

Synchronous rectifier ...................................................... G

Option:

Inhibit ............................................................ i

Type Survey and Key Data

Table 1: Type survey

Output 1

Output power

Input Voltage Range and Efficiency

Option

typ

[V DC]

[A]

[W]

32...75 V DC

[%]

5.1

4.5

30

48 IMS 30-0503-9G

87

i

Output 2

o2 nom

U

3.3

[V DC]

o1 nom

I

[A]

6.0

Uo1+

2/11

3.3

4.0

48 IMS 30-0302-9G

83

i

1.8

5.0

22

13

32...75 V DC