TDK-Lambda PFE300SA Series Instruction Manual - Tdk-Lambda
9
TDK-Lambda
PFE300SA
・
500SA Series
INSTRUCTION MANUAL
6. Explanation of Functions and Precautions
6-1. Input Voltage
Input voltage range is single phase 85-265VAC(47-63Hz). Take care not to apply input voltage which is
out specified range nor should a DC input voltage be applied as this would result into power supply
damage.
For cases where conformance to various safeties required, described as 100-240VAC (50-60Hz)
6-2. Output Voltage Range
Output voltage can be adjusted within the range below by connecting fixed and variable resistors. However,
take care not to exceed the output voltage range shown below because OVP function will activate.
Output Voltage Adjustment Range :+/-20% of the typical voltage rating
When increasing output voltage, reduce output current so as not to exceed maximum output power.
Even if the output voltage is adjusted using external circuit shown in Fig. 6-1, remote sensing can be done. For
details on Remote Sensing function, refer to “6-7. Remote Sensing”.
●Output Voltage Adjustment using Fixed and Variable Resistors
External resistor (R2) and variable resistor (VR) values, as well as, circuit connection is shown below.
For this case, remote programming of the output voltage can be done through the remote programming
resistor VR.
Be sure to connect the remote programming resistor between +S and +V terminals.
Table 6-1 External Resistor and Variable Resistor Value (For +/-20% Output Adjustment)
External Resistor (R2) : Tolerance +/-5% or less
Variable Resistor (VR) : Total Tolerance +/-20% or less End Resistance 1% or less
Fig.6-1External Resistor Connection Example
6-3. Inrush Current
Input surge current changes with the thermal fuse resistor (TFR1) value and external boost voltage bulk
capacitance value (C10).
It is recommended that verification should be done through actual evaluation.
The inrush current value indicated in the specification is measured under 25℃ using basic connection.
Inrush current increases after recovery from short interruptions.
Please be careful in the selection of an input switch, an external fuse, etc.