Description
Pin Symbol
Function
1 FB
Feedback / Shutdown
2 Vcontrol Control
3 Ramp 4 CS
Ramp Current Sense
5 Osc
Oscillator / Synchronization
6 GND 7 Drv 8 VCC
The IC ground Drive Output Supply Voltage
Function
This pin receives a current IFB which is proportional to the PFC circuit output voltage.The current is for the output regulation, output Overvoltage Protection (OVP), and output undervoltage protection (UVP).When IFB goes above 107% Iref, OVP is activated and the Drive Output is disable
Features
- that make the NCP1601 suitable for robust and compact PFC stages. Features.
- Near- Unity Power Factor in DCM or CRM.
- Voltage- Mode Operation.
- Low Startup and Shutdown Current Consumption.
- Programmable Switching Frequency for DCM.
- Synchronization Capability.
- Overvoltage Protection (107% of Nominal Output Level).
- Undervoltage Protection or Shutdown
(8% of Nominal Output Level).
- Programmable Overcurrent Protection.
- Thermal Shutdown with Hysteresis (95/140.