※Contact TDK-Lambda concerning items not mentioned or items which are not clear.
4-2 Alarm (ALM Terminal)
By means of the ALM terminal the presence / absence of an abnormal state can be monitored.
When not using the alarm output function, set the ALM terminal in the open condition.
-Vin
ALM
8V
(typ)
Sink current
10mA（max)
Fig. 4-2 Alarm Terminal Internal Circuit
When the output turns OFF as a result of over-current protection, low-voltage protection, over-voltage protection, the
Alarm Signal will operate. At that time, the ALM terminal voltage is L level (the
–
Vin terminal is 0.3V or less).
When multiple units are operated in series or in parallel, etc., and the ALM terminals are connected together, when an
abnormality occurs and the alarm signal operates in 1 unit, the other connected units can be stopped.
Converters having different output voltages can be connected. (This applies only to converters belonging to this series).
Use the ALM terminal at a maximum sink current of 10mA.
The maximum number of units to which the ALM terminal can be connected is 20 units.
4-3 Simultaneous Start-Up / Stop (PO Terminal)
By means of the PO terminal, the start-up / stop timing of multiple converter units can be synchronized.
To do so, connect the PO terminals to each other.
When not using the simultaneous start-up / stop function, set the PO terminal in the open position.
Converters having different output voltages can be connected. (This applies only to converters belonging to this series).
The maximum number of units to which the PO terminal can be connected is 20 units.
