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AN-1713 データシート(PDF) 2 Page - Texas Instruments

部品番号 AN-1713
部品情報  AN-1713 LM5116-12 Evaluation Board
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メーカー  TI [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI - Texas Instruments

AN-1713 データシート(HTML) 2 Page - Texas Instruments

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Powering and Loading Considerations
www.ti.com
2
Powering and Loading Considerations
Read this entire section prior to attempting to power the evaluation board.
2.1
Quick Setup Procedure
Step 1: Set the power supply current limit to 10A. Turn off the power supply. Connect the power supply to
the V
IN terminals.
Step 2: Connect the load, with a 5A capability, to the V
OUT terminals. The positive connection goes to P3
and negative connection to P4.
Step 3: The EN pin should be left open for normal operation.
Step 4: Set V
IN to 48V with no load applied. VOUT should be in regulation with a nominal 12V output.
Step 5: Slowly increase the load while monitoring the output voltage, V
OUT should remain in regulation with
a nominal 12V output as the load is increased up to 5 Amps.
Step 6: Slowly sweep the input voltage from 15V to 80V, V
OUT should remain in regulation with a nominal
12V output.
Step 7: Temporarily short the EN pin to GND to check the shutdown function.
Step 8: Increase the load beyond the normal range to check current limiting. Hiccup mode current limit is
used for protection. The peak short circuit current is limited to approximately 11A. Cooling is critical during
this step.
2.2
Air Flow
Prolonged operation with high input voltage at full power will cause the MOSFETs to overheat. A stand-
alone fan with at least 200 LFM should always be provided.
Figure 3. Temperature Rise at 48V
IN with
Figure 4. Temperature Rise at 48V
IN with
10 µH Gowanda Inductor
10 µH Pulse Inductor
2
AN-1713 LM5116-12 Evaluation Board
SNVA285A – October 2007 – Revised April 2013
Submit Documentation Feedback
Copyright © 2007–2013, Texas Instruments Incorporated


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