D12S300-1E Datasheet, PDF (9/13 Pages) Delta Electronics, Inc. – D/E Non-Isolated Point of Load DC/DC Modules: 4.5V~13.8Vin, 0.6V~5Vout, 60A

FEATURES DESCRIPTIONS (CON.)
Current Sharing (optional)
The parallel operation of multiple converters is available
with the D12S300-1 E. The converters will current share
to be within +/- 10% of each other. In additional to
connect the I-Share pin together for the current sharing
operation, the remote sense lines of the paralleled units
must be connected at the same point for proper
operation. Also, units should be turned on/off by enable
at the same time. Hot plugging is not recommended. The
current sharing diagram show in figure 29.
Voltage Margining Adjustment
Output voltage margin adjusting can be implemented in
the ND modules by connecting a resistor, Rmargin-up,
from the Trim pin to the Ground for margining up the
output voltage. Also, the output voltage can be adjusted
lower by connecting a resistor, Rmargin-down, from the
Trim pin to the voltage source Vt. Figure 30 shows the
circuit configuration for output voltage margining
adjustment.
Figure 29: Current sharing diagram
DS_D12S300-1_11012013
Figure 30: Circuit configuration for output voltage margining
Output Capacitance
There are internal output capacitors on the D12S300-1
series modules. Hence, no external output capacitor is
required for stable operation.
Reflected Ripple Current and Output Ripple and
Noise Measurement
The measurement set-up outlined in Figure 31 has been
used for both input reflected/ terminal ripple current and
output voltage ripple and noise measurements on
D12S300-1 series converters.
Input reflected current measurement point
Vin+
Ltest
DC-DC Converter
Cs
Cin
1uF
Ceramic
10uF
Tan
Load
Output voltage ripple noise measurement point
Cs=330μF OS-CON cap x 1, Ltest=1μH, Cin=330μF OS-CON
cap x 1
Figure 31: Input reflected ripple/ capacitor ripple current and
output voltage ripple and noise measurement setup for
D12S300-1
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