Table 2.
Vo,set | Rset (k Ω ) R33 | Recommend Value, R//R |
0.7525 | Open | Open |
1.2 | 22.464 | 23.7k//432k |
1.5 | 13.047 | 14.0k//191k |
1.8 | 9.024 | 9.53k//169k |
2.5 | 5.009 | 5.23k//118k |
3.3 | 3.122 | 3.16k//261k |
5.0 | 1.472 | 1.5k//78.7k |
Test
1.Put the resistor to program the desired output voltage set point by follow Table 1 and Table 2 for the standard output.
2.Set the input voltage to the desired operating level while monitoring DVM2.
3.Turn on the fan.
4.Set the enable switch SW2 to the “ON” position to enable the converter.
5.Adjust the output load across the converter’s operating load range.
6.Note the output voltage over the full range of the operating load range (please refer to the data sheet for the detailed specification).
(2)Output Voltage
For DNS series, trim to Vo,set using an external voltage source, connect it between the TRIM pin and GND pin. Please refer to the Table 3 and Table 4 as below for the appropriate Vout. The value of Vtrim is specified as follows:
For DNS04xx series
Vtrim = 0.7 − 0.1698 ⋅ (Vout − 0.7525)
For example, to program the output voltage of a DNS04 module to 3.3 Vdc, Vtrim is | ||||
calculated as follows: |
|
|
| |
Vtrim = 0.7 − 0.1698 ⋅ (3.3 − 0.7525) = 0.267V |
|
| ||
Table 3. : Vo,set adjustment range by use of external voltage source. | ||||
|
| Normal |
|
|
| Product Part | Output Set | Vrim (V) |
|
| Voltage |
| ||
|
|
|
| |
|
| (Vdc) |
|
|
|
| 0.7525 | Open |
|
|
| 1.2 | 0.6240 |
|
|
|
|
|
|
| DNS04S0A0R06P A/B/C | 1.5 | 0.5730 |
|
| DNS04S0A0R06N A/B/C | 1.8 | 0.5220 |
|
|
| 2.5 | 0.4030 |
|
|
|
|
|
|
|
| 3.3 | 0.2670 |
|
9
