Datasheet

40W, Dual Output
VER:00 Page 29 of 35 Issued Date：2009/03/02
Remote ON/OFF Control
The Remote ON/OFF Pin is used to turn on andoff the DC-DC converter. The user must use a switchto control
the logic voltage (highor low level) ofthe ON /OFF pin, referenced to Vi (-). The switch can be a open collector
transistor, FET, orOpto-Coupler, thatis capable of sinkingup to 0.5 mAat a low-level logic Voltage. Forhigh-level logic
of the ON/OFF signal (maximum voltage): the allowable leakage current of the switch at 12Vis 0.5 mA.
Remote ON/OFFImplementationCircuits
Isolated-Control RemoteON/OFF Level ControlUsingTTLOutput
Level ControlUsingLineVoltage
Positive logic:
PXF40 module is turnedoff at
Low-level logic
PXF40 module is turnedon at
High-levellogic