Power Management Products

While the design of power supplies emphasizes efficiency and compactness, the significance of Power Factor Correction (PFC) is steadily growing. PFC plays a vital role in limiting the effects of power supply functioning on the AC mains system, mitigating both harmonic content along power lines and losses stemming from reactive power. Nevertheless, the creation of a power supply that excels in efficiency and occupies minimal space, while also incorporating PFC, presents a formidable challenge. This article from onsemi demonstrates the potential of altering a conventional PFC topology to successfully accomplish this objective.

 

Product WPN Description
Power Factor Controllers FAN9673 Continuous Conduction mode (CCM) Power Factor Controller, Interleaved Three-Channel
NCP1612 Critical Conduction Mode (CrM) Power Factor Controller
NCP1680 Totem Pole Critical Conduction Mode (CrM) Power Factor Correction Controller
NCP1681 Totem Pole Continuous Conduction Mode (CCM) / Multimode (CrM-CCM) Power Factor Correction Controller
NCP4390 Continuous Conduction mode (CCM) Power Factor Controller, Interleaved Three-Channel
NCP13992 Current Mode Resonant Controller with Integrated High Voltage Drivers
NCP1342 Quasi-Resonant Flyback Controller with Valley Lock-Out Switching
NCP1568 AC-DC Active Clamp Flyback PWM Controller
NCP4318 Dual Channel Synchronous Rectification Controller
Regulator NCP10670/1/2 700V High-Voltage Switcher for low Power offline SMPS
NCP11187 Enhanced standby mode, 800 V Switcher
NCP10672 Highly Integrated Dual-Mode Active Clamp PWM Controller
LDO NCP164 300mA LDO Regulator, Ultra-Low Noise, High PSRR with Power Good
NCP189 LDO, 500mA, Low noise, High Accuracy with Power-Good amd VoutControlled slew rate
NCP716 LDO Regulator, 80 mA, Ultra-Low Iq
NCP731 LDO Regulator, 150 mA, 38 V, 8 µVrms Low Noise, with Enable and external Soft Start
Protection NIS4461 Electronic fuse (eFuse), 24V, 44mΩ, 4.2A
NIS5420 Electronic fuse (eFuse), 12V, 44 mΩ, 4A, ISENSE
NIS6420 Electronic Fuse, 12V
1N47 Zener diode, 1W 5%

NCP1680/1 - Totem Pole Critical Conduction Mode (CRM) / Multi-mode (CrM-CCM) Power Factor Correction Controllers

The NCP1680 and NCP1681 are PFC controllers IC designed to drive the bridgeless totem-pole PFC topology. The bridgeless totem-pole PFC is a power factor correction architecture that consists of a fast switching leg driven at the PWM switching frequency and a second leg that operates at the AC line frequency. This topology eliminates the diode bridge present at the input of a conventional PFC circuit, allowing significant improvement in the power stage efficiency. The NCP1681 controller can be configured to operate in Continuous Conduction Mode (CCM) or Multi-Mode (CrM-CCM) operation.

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