Chapter 4: Power Supplies Connection; Parallel Operation; Parallel Connection - Tdk-Lambda Rfe2500 Serie Bedienungsanleitung

CHAPTER 4:
4.1

Parallel Operation

RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
VOLTAGE PROG. J1-3
TRIM J1-13
CURRENT PROG. J1-4
+5V J1-14
CURRENT SHARE J1-17
RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
VOLTAGE PROG. J1-3
CURRENT PROG. J1-4
+5V J1-14
CURRENT SHARE J1-17
CURRENT SHARE J1-18
RFE2500
+V
+SENSE J1-2
-SENSE J1-1
-V
ENABLE J1-9
SIGNAL RETURN J1-8
V_PROG J1-3
CURRENT PROG. J1-4
+5V J1-14
CURRENT SHARE J1-17
POWER SUPPLIES CONNECTION
Figure 4–1:
LOAD
+V
-V
• Up to 8 x RFE2500 units with the same rating (voltage and
current) can be used in parallel to increase the output
current.
• By connecting the CS signal between the paralleled units,
automatic current balance is achieved with accuracy of
Accuracy ±10%:
Accuracy ±5%:
• Derate the total output current by 5% when using parallel
operation to prevent unit overload condition.
The built-in O-Ring MOSFETs on the main output and the
•
12V Auxiliary output allow N+1 operation.
• If Voltage programming is used, "VOLTAGE PROG." pin of
all units must be connected in parallel.
• Referenced to "SIGNAL RETURN" (floating from the
output) controls/signals and +12V AUX can be connected
in parallel.
• ENABLE of all supplies can be connected to a single switch.
For PMBus option.
If voltage programming is done with PMBus, Voltage
•
Programming and V_REF of all units must be connected in
parallel.
Connect PMBus Signals in parallel (PMBUS is isolated from
•
output), and choose different address for each unit.
• If Current Programming is done with PMBUS, Current
Programming and V_REF of all units must be connected
in parallel.

Parallel Connection

16
20% ≤ Iout < 80% of max Iout.
Up to 8 units
Iout ≥ 80% of max Iout.
Up to 8 units.