Parallel Operation - TDK-Lambda DLP Série Mode D'emploi

3-6. Output Ripple & Noise
The standard specification for maximum ripple value is
measured according to measurement circuit specified by
JEITA-RC9131. When load lines are longer, ripple becomes
larger. In this case, electrolytic capacitor, film capacitor, etc.
might be necessary to use across the load terminal. The output
ripple cannot be measured accurately if the probe ground lead
of oscilloscope is too long.
L +
+
INPUT
P.S.
C2 C3
N -
FG
150mm
R : 50Ω
C1 : 4700pF Film Capacitor
C2 : 100uF Electrolytic Capacitor
C3 : 0.1uF Film Capacitor
3-7. Series Operation
For series operation, either method (A) or (B) is possible.
Method ( A )
Power
Supply
Output
Terminal
Output
Terminal
Method ( B )
Power
Supply
Output
Terminal
Output
Terminal
Load
1.5m 50Ω Cable
Oscilloscope
R
Bandwidth : 100MHz
C1
Load
Load
Load

3-8. Parallel Operation

(A) To increase the output current is not possible.
Power
Supply
Output
Terminal
Output
Terminal
(B) To use as Back-up Power Supply
1. Set power supply output voltage higher by the forward
voltage drop(VF) of diode
2. Adjust the output voltage of each power supply to be
the same.
3.
Use within the specifications for output voltage and
output power.
Power
Supply
Output
Terminal
Output
Terminal
3-9. Isolation Test
Isolation resistance between output and FG (Chassis) shall
be more than 100MΩ at 500VDC. For safety operation,
voltage setting of DC isolation tester must be done before the
test. Ensure that the it is fully discharged after the test.
Output ~ FG (Chassis)
500VDC 100MΩ or more
TDK-Lambda
DLP/E Series
INSTRUCTION MANUAL
Load
Load