NCA005 datasheet(20/23 Pages) CANDD

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Page 20

NCA005 6200830000 A01 03Mar06

Volant NCA005 Series

Non-Isolated 5A SIP/SMT DC/DC Converters

www.cdtechno-cps.com

Output Voltage Set point adjustment.

The following relationship establish the calculation of external resistors:

5110

7525

21070

−

Radj

For Vout setting an external resistor is connected between the TRIM and Ground Pin.

Resistor values for different output voltages are calculated as given in the table:

Vo, set (Volts)

RAdj (K

Ω)

3.3

3.160

2.5

6.947

2.0

11.780

1.8

15.004

1.5

23.077

1.2

41.973

1.0

80.02

0.9

137.74

0.75

Open

SMT Lead free Reflow profile

1. Ramp up rate during preheat : 1.33

℃/Sec ( From 30℃ to 150℃ )

2. Soaking temperature : 0.29

℃/Sec ( From 150℃ to 180℃ )

3. Ramp up rate during reflow : 0.8

℃/Sec ( From 220℃ to 250℃ )

4. Peak temperature : 250

℃, above 220℃ 40 to 70 Seconds

Ramp up rate during cooling : -1.56

℃/Sec ( From 220℃ to 150℃ )

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