NCP1249 - High-Voltage Current-Mode PWM Controller
11 X2 X2 *capacitors discharge When the voltage on this pin disappears, the controller ensures the X2 *capacitors discharge.
22 REM Remote input Initiates ultra low consumption mode (off *mode) when brought above 8 V (A/B) or below 0.4 V (C/D).
32 FB Feedback pin Con
NCP1249 High-Voltage Current-Mode PWM Controller Featuring Peak Power Excursion and Extremely Low Stand-by Power Consumption www.onsemi.com The NCP1249 is a highly integrated high voltage PWM controller capable of delivering a rugged and high performance offline power supply with extremely low no load consumption.
With a supply range up to 30 V, the controller hosts a jittered 65 kHz switching circuitry operated in peak current mode control.
When the power on the secon
NCP1249 Features
* several key protective features: a internal brown
* out, a non
* dissipative Over Power Protection for a constant maximum output current regardless of the input voltage and two latched over voltage protection inputs
* either through a dedicated pin or via the VCC input. The contr
