NCP1231 - Low Standby Power High Performance PWM Controller

Product Overview

ON Semiconductor

Part number	NCP1231
Manufacturer	ON Semiconductor
File Size	518.14 KB
Description	Low Standby Power High Performance PWM Controller
Datasheet	NCP1231 Datasheet
Additional preview pages of the NCP1231 datasheet.

Pin No.

end stage Pin Description This pin is a direct connection to the VCC pin (Pin 6) via a low impedance switch.

In standby and during the startup sequence, the switch is open and the PFC VCC is shutdown.

As soon as the aux.

offered by the NCP1231 is an event management scheme that can disable the front.
end PFC circuit during standby, thus reducing the no load power consumption. The NCP1231 itself goes into cycle skipping at light loads while limiting peak current (to 25% of nominal peak) so that no acoustic noise is generated and while in the skip cycle mode. The NCP1231 also features an internal latching function that can be used for Overvoltage Protection (OVP). The latch is triggered when the voltage on.

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Published: Jan 16, 2007 |