Datasheet

DS_D12S300-1_12282009
9
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 30 has been
used for both input reflected/ terminal ripple current and
output voltage ripple and noise measurements on
D12S300-1 series converters.
DC-DC Converter
1uF
Ceramic
Tan
10uF
Vin+ Load
Ltest
Cs
Cin
Output voltage ripple noise measurement point
Input reflected current measurement point
Cs=330µF OS-CON cap x 1, Ltest=1µH, Cin=330µF OS-CON
cap x 1
Figure 30: Input reflected ripple/ capacitor ripple current and
output voltage ripple and noise measurement setup for
D12S300-1
FEATURES DESCRIPTIONS (CON.)
Voltage Margining Adjustment
Output voltage margin adjusting can be implemented in
the ND modules by connecting a resistor, R
margin-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, R
margin-down, from the Trim pin to
the voltage source Vt. Figure 29 shows the circuit
configuration for output voltage margining adjustment.
Figure 29: Circuit configuration for output voltage margining