Texas Instruments LM5116-12 Evaluation Board LM5116-12EVAL/NOPB LM5116-12EVAL/NOPB 데이터 시트
제품 코드
LM5116-12EVAL/NOPB
Powering and Loading Considerations
2.5
Synchronization
A SYNC pin has been provided on the evaluation board. This pin can be used to synchronize the regulator
to an external clock. For complete information, see LM5116 Wide Range Synchronous Buck Controller
(
to an external clock. For complete information, see LM5116 Wide Range Synchronous Buck Controller
(
).
Figure 8. Synchronization at 48V
IN
2.6
Active Loads
shows a typical start-up characteristic into a constant current active load. This type of load can
exhibit an initial short circuit, which is sustained well beyond the duration of the fault timer. Increasing the
soft-start time improves the ability to start into this type of load. For the extreme case, the hiccup fault
timer may be disabled by removing C7. A sustained short circuit should be avoided when the fault timer is
not used.
soft-start time improves the ability to start into this type of load. For the extreme case, the hiccup fault
timer may be disabled by removing C7. A sustained short circuit should be avoided when the fault timer is
not used.
Figure 9. Start-up into Active Load at 48V
IN
4
AN-1713 LM5116-12 Evaluation Board
SNVA285A – October 2007 – Revised April 2013
Copyright © 2007–2013, Texas Instruments Incorporated