INSTRUCTION MANUAL
PFE500F
Series
TDK-Lambda
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At parallel operation, +BC, -BC and R terminals must not be connected in parallel with other modules. It might
result in power module damage.
Refer to “Parallel Operation” of the Power Module Application Notes for details.
13. Power ON Signal (ENA terminal)
This signal is located at the secondary side (output side) and it is an open drain output. (Maximum sink current is
10mA and maximum applied voltage is 75V.)
Return line for ENA terminal is the COM terminal.
When output voltage goes over a specified voltage level at start up, Power ON signal is LOW.
Output voltage threshold level is as follows.
PFE500F-12 : 8V (TYP)
PFE500F-28 : 19V (TYP)
PFE500F-48 : 33V (TYP)
On the other hand, output voltage threshold level for Power ON signal to turn HIGH is as follows.
PFE500F-12 : 6V (TYP)
PFE500F-28 : 15V (TYP)
PFE500F-48 : 28V (TYP)
14. I.O.G signal (IOG terminal)
Normal or abnormal operation of the power module can be monitored by using the IOG terminal. Output of this
signal monitor is located at secondary side (output side) and is an open collector output.
This signal is LOW when inverter is normally operating and HIGH when inverter stops or when inverter is
operating abnormally. (maximum sink current is 5mA, maximum applied voltage is 35V)
Ground for the IOG terminal is the COM terminal.
Also note that IOG becomes unstable for following conditions:
･
Operation of Over Current Protection (OCP)
･
Light load conditions at parallel operation
･
Dynamic load operation
15. Auxiliary power supply for external circuits (AUX terminal)
For AUX terminal, output voltage value is within 10
～
14VDC range, maximum output current is 20mA. Ground
for the AUX terminal is COM terminal.
Avoid short circuit of AUX terminal with other terminals as this would lead to power module damage.
17/21
+S
-S
+V
-V
TRIM
+
-
Load
PC
Fig. 12-1 Output Voltage Adjustment by applying external voltage (For parallel operation)
