NCP1351PRINTGEVB
http://onsemi.com
5
Scope Shots
Below are some oscilloscope shots gathered on the
evaluation board:
32 V
V
OUT
V
DRAIN
2.7 s
Figure 6. Start-up Time, V
IN
= 85 Vac
Figure 7. Maximum Output Power, V
IN
= 265 Vac
Conclusion
The printer power supply built with the NCP1351 exhibits
an excellent performance on several parameters like the
efficiency and the low-load standby. The transient switching
frequency increase allows to deliver peak power during a
limited time; but if the overpower lasts longer than the set
fault timer, the controller safely latches off.
The limited number of surrounding components around
the controller associated to useful features (timer-based
protection, latch input
…
) makes the NCP1351 an excellent
choice for cost-sensitive printer adapter designs.
