NCP1608BOOSTGEVB
http://onsemi.com
15
Input Current and Output Voltage
The input current and output voltage ripple are shown in
Figure 27. The overvoltage protection is observed by
starting up the pre-converter with no load as shown in
Figure 28. The NCP1608 detects an OVP fault when V
out
reaches 421 V and restarts when V
out
decreases to 410 V.
V
in
(50V/div)
I
in
(1A/div)
V
out
(10V/div, ac coupled)
Figure 27. Input Current and Output Voltage Ripple (V
in
= 115 Vac 60 Hz, I
out
= 250 mA)
Figure 28. Startup Transient Showing OVP Detection and Recovery (V
in
= 115 Vac 60 Hz, I
out
= 0 mA)
V
CC
(10V/div)
V
DRV
(10V/div)
V
out
(100V/div)
V
in
(100V/div)
