NC12S0A0V60NNFA DELTA [Delta Electronics, Inc.], NC12S0A0V60NNFA Datasheet - Page 10

• Manufacturer Part Number: NC12S0A0V60NNFA
• Description: Delphi NC Series Non-Isolated Point of Load DC/DC Power Modules: 12Vin, 0.9V-5Vout, 60A
• Manufacturer: DELTA [Delta Electronics, Inc.]

Voltage Margin Adjusting
Output voltage margin adjusting can be implemented in
the NC60A modules by connecting a resistor, R
from the Trim pin to the ground pin for adjusting voltage
a little bit higher. Also, the output voltage can be
adjusted lower by connecting a resistor, R
the Trim pin to the output pin. Figure 34 shows the
circuit configuration for output voltage margin adjusting.
Figure 34: Circuit configuration for output voltage margining
Output Capacitance
An external output capacitor is required for stable
operation.
Reflected Ripple Current and Output Ripple
and Noise Measurement
The measurement set-up outlined in Test Configuration
Figure
reflected/terminal ripple current and output voltage
ripple
converters.
Cs=270uF*1 Ltest=1.4uH Cin=270uF*3 Cout=680uF*4
Figure 35:Input Reflected Ripple/Capacitor Ripple Current
and Output Voltage Ripple and Noise Measurement Set-Up for
NC60A
Vin+
DS_NC12S60A_02072007
Cs
and
1
Ltest
35
Input reflected current measurement point
+SENSE
GROUND
-SENSE
2
Vout
TRIM
noise
have
Cin
measurements
been
DC-DC Converter
Output voltage ripple noise measurement point
Cout
Rs
used
Cout
Vt
0
Rmargin-down
Rmargin-up
for
100nF
Ceramic
on
margin-down
10uF
Tantalum
both
NC
margin-up
series
, from
input
LOAD
,
THERMAL CONSIDERATION
The electrical operating conditions of the NC, namely:
●
●
●
Determine how much power is dissipated within the
converter. The following parameters further influence the
thermal stresses experienced by the converter:
●
●
●
●
●
In order to simplify the thermal design, a number of thermal
de-rating plots are provided. These de-rating graphs show
the load current of the NC versus the ambient air
temperature and air flow. However, since the thermal
performance is heavily dependent upon the final system
application, the user needs to ensure the thermal reference
point temperatures are kept within the recommended
temperature rating. It is recommended that the thermal
reference point temperatures are measured using a
thermocouple or an IR camera. In order to comply with
stringent Delta de-rating criteria, the ambient temperature
should never exceed 85℃. Please contact Delta for further
support..
The maximum acceptable temperature measured at the
thermal reference point is 127
36.
Note: Wind Tunnel Test Setup
Input voltage, V
Output voltage, V
Output current, I
Ambient temperature
Air velocity
Thermal efficiency of the end system application
Parts mounted on system PCB that may block airflow
Real airflow characteristics at the converter location
MEASURED BELOW
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
FACING PWB
in
o
o
AIR FLOW
℃.
This is shown in Figure
PWB
50.8 (2.0”)
MODULE
19 (0.75”)
38 (1.5”)
10