SLDM-12D1Ax

13

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Rev. AC

12. INPUT FILTERING

The SLDM-12D1Ax module should be connected to a low ac-impedance source. A highly inductive source can affect the stability of the module.

An input capacitance must be placed directly adjacent to the input pin of the module, to minimize input ripple voltage and ensure module stability.

To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Figure 37 shows the input ripple voltage for

various output voltages at 12A of load current with 1x22 µF or 2x22 µF ceramic capacitors and an input of 12V.

Figure 37

.

Note: Input ripple voltage for various output voltages with 2x22 µF or 3x22 µF ceramic capacitors at the input (12A load). Input voltage

is 12V.

0

50

100

150

200

250

300

350

400

450

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

1x22uF

2x22 uF