Datasheet > 20IMX4-0324-8KZG

20IMX4-0324-8KZG

更新时间： 2022-12-29 21:23:58

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IMX4 Series Data Sheet 4 Watt DC-DC Converters

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20IMX4-0324-8KZG 数据手册

IMX4 Series Data Sheet

4 Watt DC-DC Converters

Input Transient Voltage Protection

Fuse and Reverse Polarity Protection

In many applications transient voltages on the converter input

are always possible. These may be caused for example by

short circuits between Vi+ and Vi–, where the network

inductance may generate high energy pulses.

The suppressor diode on the input also protects against

reverse polarity input voltage. An external fast fuse is required

to limit this reverse current; see table below.

In order to protect the converter, a transient voltage sup-

pressor diode is fitted at the input; see table below.

Table 6: External input fuse

Model

Fuse type

Fast 1.6 A

Fast 1 A

Table 4: Built-in transient voltage suppressor

5IMX4

Model

Breakdown

voltage

V_{BR nom}

Peak power

at 1 ms

P_P

Peak pulse

current

I_PP

20IMX4

40IMX4

70IMX4

Fast 0.5 A

Fast 0.315 A

5IMX4

20IMX4

40IMX4

70IMX4

40 V

100 V

150 V

600 W

10.3 A

4.1 A

2.9 A

If transients generating currents above the peak pulse current

I_PPare possible, an external limiting network such as the circuit

shown in figure 8 is recommended. It provides compliance with

transients according to IEC/EN 61000-4-5, level 2. The comp

onents are specified in table 5.

If 40IMX4 converters should withstand 150 V transients

according to 19Pfl1, the same external circuitry with similar

components as shown in figure 8 can be used.

04036b

L_i

Vi+

C_i

Vi–

Fig. 8

External circuitry to comply with

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

Table 5: Components for the circuitry fig. 8

Model

20IMX4

40IMX4

70IMX4

L_i

330 µH, 0.42 W

1 A

330 µH, 0.42 W

0.6 A

330 µH, 0.65 W

0.3 A

C_i

68 µF, 50 V

68 µF, 100 V

100 µF, 200 V

–

ON 1.5KE 39 A

ON 1.5KE 82 A

MELCHER

The Power Partners.

BCD20006-G Rev AE, 16-Sep-2015

Page 5 of 12

1 2 3 456 7 8...12

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