Texas Instruments LM25117 Wide Vin Synchronous Buck Controller Evaluation Board LM25117EVAL/NOPB LM25117EVAL/NOPB Datenbogen
Produktcode
LM25117EVAL/NOPB
Powering and Loading Consideration
Conditions:
Input Voltage = 24VDC
0.5
Input Voltage = 24VDC
0.5
Ω
Load on the output
Traces:
Top Trace: Output Voltage, Volt/div = 1V
Bottom Trace: Inductor Current, Amp/div=2A
Horizontal Resolution = 1ms/div
Top Trace: Output Voltage, Volt/div = 1V
Bottom Trace: Inductor Current, Amp/div=2A
Horizontal Resolution = 1ms/div
Figure 2. Start-Up with Resistive Load
3.5.2
Load Transient
shows the transient response for a load of change from 2A to 6.5A. The upper waveform shows
output voltage droop and overshoot during the sudden change in output current shown by the lower
waveform.
waveform.
Conditions:
Input Voltage = 24VDC
Output Current 2A to 6.5A
Traces:
Top Trace: Output Voltage
Volt/div = 100mV, AC coupled
Bottom Trace: Load Current, Amp/div = 2A
Horizontal Resolution = 0.5ms/div
Input Voltage = 24VDC
Output Current 2A to 6.5A
Traces:
Top Trace: Output Voltage
Volt/div = 100mV, AC coupled
Bottom Trace: Load Current, Amp/div = 2A
Horizontal Resolution = 0.5ms/div
Figure 3. Load Transient Response
3
SNVA469B – May 2011 – Revised April 2013
AN-2112 LM25117 Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated