Texas Instruments LM5117 Evaluation Board LM5117EVAL/NOPB LM5117EVAL/NOPB Datenbogen
Produktcode
LM5117EVAL/NOPB
Powering and Loading Consideration
3.5
Waveforms
3.5.1
Soft Start
When applying power to the LM5117 evaluation board, a certain sequence of events occurs. Soft-start
capacitor and other components allow for a linear increase in output voltage.
capacitor and other components allow for a linear increase in output voltage.
shows the output
voltage during a typical start-up with a load of 1.5
Ω
Conditions:
Input Voltage = 48VDC
1.5
Input Voltage = 48VDC
1.5
Ω
Load on the output
Traces:
Top Trace: Output Voltage, Volt/div = 5V
Bottom Trace: Inductor Current, Amp/div=5A
Horizontal Resolution = 2ms/div
Top Trace: Output Voltage, Volt/div = 5V
Bottom Trace: Inductor Current, Amp/div=5A
Horizontal Resolution = 2ms/div
Figure 2. Start-Up With Resistive Load
3
SNVA466B – May 2011 – Revised April 2013
AN-2103 LM25117 Evaluation Board
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