LinkSwitch-HP
1. Startup
26. Pause 150 ms
(Auto-Restart Off
Period (tAR(OFF)
)
No
3. AC
Present?
(IFB > -250 µA)
4. Start Switching
(With 15 ms
Soft-Start)
2. Latching
Shutdown?
(CBF = 47 µF)
5. Line OV?
(IFB > -1.15 mA
for 2 Cycles)
Yes
Yes
No
Yes
No
6. Brown-Out?
(IFB < -100 µA
for 8 Cycles)
Yes
No
11. AC
Present?
(IFB > -250 µA)
27. Pause 150 ms
(Auto-Restart Off
No
Period tAR(OFF)1
)
7. Regulation
Lost? (VFB < 1.85 V
for 35 ms)
No
Yes
14. Line OV?
(IFB > -1.15 mA
for 2 Cycles)
12. Start Switching
(With 15 ms
No
Soft-Start)
Yes
8. Stop Switching
15. Brown-Out?
(IFB < -100 µA
for 8 Cycles)
Yes
20. Start Switching
(With 15 ms
Soft-Start)
No
No
9. Latch Reset?
(VPD > 3.4 V)
16. Regulation
Lost? (VFB < 1.85 V
for 35 ms)
No
21. Line OV?
(IFB > 1.15 mA
for 2 Cycles)
Yes
Yes
Yes
No
10. Reset Latch
22. Brown-Out?
(IFB < -100 µA
for 8 Cycles)
Yes
PI-6838-101812
17. Stop Switching
No
23. Regulation
Lost? (VFB < 1.85 V
for 35 ms)
18. Pause 150 ms
(Auto-Restart Off
No
Period tAR(OFF)1
)
Yes
No
24. Stop Switching
19. AC Present?
(IFB > -250 µA)
Yes
25. Pause 1500 ms
(Auto-Restart Off
Period tAR(OFF)2
)
Figure 9. Line Sensing and Auto-Restart Flow Chart.
6
Rev. E 06/15
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