TDK-Lambda CPF100F280 Series Instruction Manual page 12

Fig.6-7 Remote Sensing at Use
6-10. ON/OFF Control (CNT, SG terminal)
Without turning the input supply on and off, the output can be enable and disabled using this function.
ON/OFF control circuit is on the input side (the primary side), and CNT terminal pin is used. Use the SG terminal
as ground for CNT terminal.
If this function is not used, short the CNT terminal and the SG terminal.
1) The maximum impressed voltage for the CNT terminal is 35V and the maximum reverse voltage is 0.7V. Also the
source current for CNT terminal is about 1mA.
When wiring becomes long, connect a capacitor about 0.1µF value between the CNT and the SG terminal at a
nearest distance.
2) ON/OFF terminal can be controlled by opening or closing connections (with switch or relay), or by photo-coupler
ON/OFF.
Also for the secondary control, isolation can be achieved through the use of a photo-coupler or equivalent.
* When using photo-coupler, connect between the CNT and the SG terminal to make transistor side shortest.
6-11. Parallel Operation (PC terminal)
By connecting the PC terminal of each power module, output current can be equally drawn from each module. A
maximum of 11 units of the same model can be connected.
Furthermore, be sure that the output power of every module does not exceed the maximum output power value.
By setting output voltage accuracy of each module in a parallel operation to within ±1%, the maximum value of the
output current that can be drawn is 95% of the total rated output current.
Refer to "Parallel Operation" of the Power Module Application Notes for details.
6-12. Series Operation
Series operation is possible for CPF1000F280 -* series. Connections shown fig. 6-10 and fig. 6-11 is possible
All specifications are subject to change without notice.
Fuse
+
C1
Fig.6-9 CNT, SG terminal connection
Table 6-3 ON/OFF Control Mode
CNT Level
Ｈ(4Vand above ) or Open
Ｌ(0.8Vand below )or short
12 / 18
TDK-Lambda
CPF1000F 280-* Series
INSTRUCTION MANUAL
Output Voltage is stabilized at Module
Output Terminal
+V
+S
C3 C4
-S
-V
Fig.6-8 Remote Sensing Not in Use
+Vin
-Vin
SG
CNT
Output Status
OFF
ON
+
Load
-