page
date
9 of 9
04/2008
PART NUMBER:
VHK50W
DESCRIPTION:
chassis mount dc-dc converter
18. OUTPUT FILTERING
The converter has built-in capacitors at the output to control ripple and noise. If desired, additional output capacitance can be
introduced at the input to the powered equipment. Recommended starting point: one 10μF tantalum and one 1μF ceramic capacitor in
parallel at the output.
19. OUTPUT NOISE MEASUREMENT SCHEMATIC
For proper output ripple and noise measurement, connect a 10μF tantalum and a 1μF ceramic capacitor across the output. Set the
scope bandwidth to 20MHz. Probe directly off of one of the capacitors, using a small ground clip to minimize measurement error.
+Vin
+Vo
+S
Trim
-S
Ceramic
1.0µF
+
Resistor
Load
-Vin
-Vo
Solid Tantalum
10µF
To Scope
FIGURE 11. OUTPUT NOISE MEASUREMENT CIRCUIT
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2382
CUI [ CUI INC ]
