TDK-Lambda PH-A280 Series Instruction Manual - Tdk-Lambda
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TDK-Lambda
PH-A280 Series
INSTRUCTION MANUAL
6. Explanation of Functions and Precautions
6-1. Input Voltage Range
Input voltage range for PH-A280 Series is indicated below.
Input Voltage Range : 200 - 425VDC
Ripple voltage (Vrpl) which results from rectification and filtering of commercial AC line is might be included
within the input voltage as shown in Fig. 6 -1.
In this case, ripple voltage must be limited within the voltage described below.
Allowable Input Ripple Voltage:20Vp-p
When this value is exceeded, the output ripple voltage becomes large.
Take note that sudden input voltage change might be cause variation of output voltage transitionally.
Moreover, maximum value and minimum value of input voltage waveform must not go beyond the limit
of above input voltage range.
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Fig.6-1 Input Ripple Voltage
6-2. Output Voltage Adjustment Range
Output voltage could be adjusted within the range described below by external resistor or variable resistor.
Output Voltage Adjustment Range
5V : –20% - +20% of Nominal Output Voltage
12V,24V,48V:–20% - +10% of Nominal Output Voltage
When increasing the output voltage, reduce the output current accordingly so as not to exceed the maximum
output power.
Take note that when output voltage is decreased, maximum output current is until rated maximum output
current of specification.
Remote sensing is possible even when output voltage is varied. For details on remote sensing function, please
refer to “6-10. Remote Sensing”.