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4-8. Output Ripple & Noise
Ripple & noise are measured at 20MHz by using a 300mm twisted pair of load wires terminated with a 0.1uF film
capacitor & 47uF electrolytic capacitor. When load lines are longer, ripple becomes larger. The output ripple cannot be
measured accurately if the probe ground lead of oscilloscope is too long. At low temperature, large ripple & noise may
also be observed due to large ESR of the internal Electrolytic Capacitors especially at -25°C.
4-9. Series Operation
For series operation, either method ( A ) or ( B ) is possible.
Method ( A )
Power
Supply
Output
Terminal
Output
Terminal
Note : In case of Method ( A ), please connect diodes to prevent the reverse voltage.
4-10. Parallel Operation
(A) Operation to increase the Output Current is not possible.
(B) Operation as a Backup Power Supply is possible as follows.
1.
Set the power supply output voltage higher by the amount of forward voltage drop ( V
2.
Please adjust the output voltage of each power supply to be the same.
3.
Please use within the specifications for output voltage and output current.
(A)
Power
Supply
Output
Terminal
Output
Terminal
Method ( B )
Power
Supply
Output
Terminal
Load
Output
Terminal
(B)
Power
Supply
Output
Terminal
Load
Output
Terminal
6
TDK-Lambda
GWS 2
Series
50
INSTRUCTION MANUAL
Load
Load
) of the diode.
F
Load
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