Technical Reference Note
Rev.09.30.14_#1.0
AVO250-48S28B
Page 21
Input Ripple & Output Ripple & Noise Test Configuration
Probe
Current probe
L1
50mm
Vo+
Vo-
Vin+
DC/DC
C1 C2
C3 C4
Cin
Load
Vdc
Vin-
Figure 19 Input ripple & inrush current, output ripple & noise test configuration
Vdc: DC power supply
L1: 12uH
Cin: 220μF/100V typical
C1: 220μF/100V electrolytic capacitor, High frequency and low ESR
C2 C3: SMDceramic-100V-1000nF-X7R-1210
C4: 1000μF/50V electrolytic capacitor, High frequency and low ESR
Note: It is recommended to use a coaxial cable with series 50Ω resistor and 0.68μF ceramic capacitor or a ground ring of
probe to test output ripple & noise.
Artesyn Embedded Technologies
ARTESYN [ ARTESYN TECHNOLOGIES ]
