Delta-electronics DNM User Manual download pdf (Page 10)

For DNM12xx and DNL12xx series

()

7525.00667.07.0

−

×−= VoutVtrim V

For example, to program the output voltage of a DNL12S module to 3.3 Vdc, Vtrim is

calculated as follows

()

53.07525.03.30667.07.0

−×−=Vtrim V

Table 4. : Vo,set adjustment range using external voltage source.

Product Part

Normal

Output Set

Voltage

(Vdc)

Vrim (V)

0.7525 Open

1.2 0.670

1.5 0.650

1.8 0.630

2.5 0.583

3.3 0.530

DNM12S0A0S10P A/B/C

DNM12S0A0S10N A/B/C

DNL12S0A0S16P A/B/C

DNL12S0A0S16N A/B/C

5.0 0.4167

8.2.5 Voltage Margining

Output voltage margining can be carry out by connecting a resistor from the Trim pin to ground

pin for trim up and connecting a resistor from Trim pin to Output pin for Trim down. The Rmargin-

up is for trim up and Rmargin-down is for trim down. (Please refer to the data sheet and

Evaluation Board Schematic for the detailed information).

A software tool for voltage margining calculation is available to ask for. The values of Rmargin-

up and Rmargin-down for a specific output voltage and margin percentage can then be figured

out. Please consult your local Delta Field Application Engineer or sales persons for additional

information.

Test

1) Put the resistor with desire of the voltage trim.

2) Turn on the fan.

3) Adjust the input voltage while monitoring DVM2 and with output load set to the desired

operating point.

4) Set the enable switch SW2 to the “ON” position to enable converter.

5) Use SW3 (refer to Item 7.1_6) for Trim setup.

6) Note the voltage by observing DVM3.

7) Test the Load Regulation (refer to Item 8.2.2).

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Delta-electronics DNM User Manual Page 10

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