Datasheet4U Logo Datasheet4U.com

NCP1231 - Low Standby Power High Performance PWM Controller

General Description

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.

Key Features

  • 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.

📥 Download Datasheet

Datasheet Details

Part number NCP1231
Manufacturer onsemi
File Size 518.14 KB
Description Low Standby Power High Performance PWM Controller
Datasheet download datasheet NCP1231 Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
NCP1232 Microprocessor Monitor ON
NCP1212 Current Mode PWM Controller ON
NCP1215 Low Cost Variable OFF Time Switched Mode Power Supply Controller ON
NCP1216 PWM Current-Mode Controller ON
NCP1225 Low Standby Power SMPS Controller ON

Other Datasheets by onsemi

Part Number Description
NCP1230 Low Standby Power High Performance PWM Controller
NCP1230A Low-Standby Power Soft Skip Mode Controller
NCP1234 Fixed Frequency Current Mode Controller
NCP1235 Fixed Frequency Current Mode Controller
NCP1236 Fixed Frequency Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
www.DataSheet4U.com NCP1231 Low−Standby Power High Performance PWM Controller The NCP1231 represents a major leap towards achieving low standby power in medium−to−high power Switched−Mode Power Supplies such as notebook adapters, off−line battery chargers and consumer electronics equipment. Housed in SOIC−8 or PDIP−8, the NCP1231 contains all needed control functionality to build a rugged and efficient power supply. Among the unique features 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.