Datasheet > 24IMS7-05-7C

24IMS7-05-7C

更新时间： 2024-01-29 04:49:54

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BEL		/
页数	文件大小	规格书
15页	320K
描述
DC-DC Regulated Power Supply Module, 1 Output, 7W, Hybrid

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24IMS7-05-7C 数据手册

Industrial Environment

DC-DC Converters <40Watt

IMS 7 Series

Input Transient Voltage Protection

Reverse Polarity Protection at Input

In many applications transient voltages on the input of the

converter are always possible. These may be caused for ex-

ample be short circuits between Vi+ and Vi– where the net-

work inductance may cause high energy pulses.

The suppressor diode on the input also provides for reverse

polarity protection by conducting current in the reverse di-

rection, thus protecting the unit. An external fuse is required

to limit this current:

– For 24 IMS 7 a fast 2 A (F2A) fuse is recommended.

– For 48 IMS 7 a fast 1 A (F1A) fuse is recommended.

In order to protect the converter a large transient voltage

supressor has been fitted to the input of the IMS 7 types.

Specifications as per table below.

Inrush Current

Table 3: Built-in transient voltage suppressor

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 limit this current further.

Type

Breakdown

Voltage

Peak Power

at 1 ms

P_P

Peak Pulse

Current

I_PP

V_{BR nom}

1 A/Div.

24 IMS 7

48 IMS 7

53 V

600 W

7.7 A

4.1 A

04030

100 V

If transients generating currents above the peak pulse cur-

rent I_ppare possible then an external limiting network such

as the circuit recommended for IEC 801-5, level 2 compli-

ance is necessary.

To achieve IEC/EN 61000-4-5, level 2 compliance an addi-

tional inductor and capacitor should be provided externally

as shown in the figure below. The components should have

similar characteristics as listed in table 9.

10 µs/Div.

To withstand the 150 V transient according to 19 Pfl 1, appli-

cable for 48 IMS 7 types, the same external circuitry with

similar components as for IEC/EN 61000-4-5, level 2 com-

pliance can be used.

Fig. 8

Typical inrush current at U_{i nom}, P_{o nom}versus time

(48 IMS 7) measured according to prETS 300132-2 (Ver-

sion 4.3)

04043

V+

Vi+

Module

V–

Vi–

Fig. 6

Example for external circuitry to comply with

IEC/EN 61000-4-5, level 2.

Table 4: Components for external circuitry to comply with

IEC 801-5

Circuit Ref.

24 IMS 7

48 IMS 7

330 µH, 0.42 Ω, 0.6 A

TDK TSL1110-331KR55 TDK TSL1110-331KR55

68 µ, 63 V, 85°C

68 µF, 100 V, 85°C

04029

10.5

0.7

Fig. 7

Dimensions for inductor L

Edition 5/9.99

5/15

MELCHER

The Power Partners.

1 2 3 456 7 8...15

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