Series Connection For Positive And Negative Output Voltage - TDK-Lambda GENESYS 750W HALF RACK Technical Manual

Remote programming in series operation for increased output voltage:
1. Programming by external voltage:
2.Using the SO function and PS_OK signal:
3. Programming by external resistor:
4. Programming via the Serial

5.14.2 Series connection for positive and negative output voltage

In this mode, two units are configured as a positive and negative output. Set the Output Current
limit of each power supply to the maximum that the load can handle without damage. It is rec-
ommended that diodes be connected in parallel with each unit output to prevent reverse voltage
during start-up or in case one of the units shuts down. Each diode should be rated to at least the
power supply rated output voltage and output current. Refer to Fig.5-3 for this operating mode.
Fig.5-3: Series connection for positive/negative output voltages
The analog programming circuits of this power su-
ply are referenced to the negative output potential.
Therefore, the circuits used to control each series
connected unit must be separated and floated from
each other.
The Shut-Off and PS_OK circuits are referenced to
the isolated interface common, IF_COM (J1-2,3).
The IF_COM terminals of different units can be
connected to obtain a single control circuit for the
power supplies connected in series.
Programming by external resistor is possible. Refer
to Section 6-5 for details.
The communication port is referenced to the
IF_COM which is isolated from the power supply
output potential. Therefore power supplies con-
nected in series can be daisy-chained using the
Remote-In and Remote-Out connectors. Refer to
Chapter 7 for details.
+S
+LS
+
POWER
SUPPLY -
-LS -S
+S
+LS
+
POWER
SUPPLY
-
-LS -S
40
83-507-5002 Rev. B
(*)
+
-
(*) Diodes are user supplied.
(*)