NCP1601A, NCP1601B
Compact Fixed Frequency Discontinuous or Critical Conduction Voltage Mode Power Factor Correction Con...
NCP1601A, NCP1601B
Compact Fixed Frequency Discontinuous or Critical Conduction
Voltage Mode Power Factor Correction Controller
The NCP1601 is a controller designed for Power Factor Correction (PFC) boost circuits. The device operates in fixed- frequency Discontinuous Conduction Mode (DCM) and variable- frequency Critical Conduction Mode (CRM) and takes advantages from both operating modes. DCM limits the maximum switching frequency. It simplifies the front- ended EMI filter design. CRM limits the maximum currents of the boost stage diode,
MOSFET and inductor. It reduces the costs and improves the reliability of the circuit. This device substantially exhibits unity power factor while operating in DCM and CRM. The NCP1601 minimizes the required number of external components. It incorporates high safety protection 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 Over
voltage Protection (107% of Nominal Output Level) Under
voltage Protection or Shutdown
(8% of Nominal Output Level)
Programmable Overcurrent Protection Thermal Shutdown with Hysteresis (95/140C) Two VCC Under
voltage Lockout Hysteresis Options:
4.75 V for NCP1601A and 1.5 V for NCP1601B
These are Pb- Free Devices
Typical Applications
Electronic Light Ballast AC Adapters TV & Monitor...