onsemi NCP1680 CRM PFC Controller IC
The onsemi NCP1680 is a CRM PFC controller IC designed to drive the bridgeless totem-pole PFC topology. Featuring a topology which eliminates the diode bridge present at the input of a conventional PFC circuit, the bridgeless totem-pole PFC greatly improves power stage efficiency.
The NCP1680 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.
Features - Totem Pole PFC Topology Eliminates Input Diode Bridge
- Critical Conduction Mode (CRM) Operation
- Discontinuous Conduction Mode (DCM) with Valley Turn On Under Light Load Condition
- Frequency Foldback in DCM With 25 kHz Minimum Frequency
- Skip Mode in Very Light Load Condition
- Proprietary Current Sense Scheme
- Digital Voltage Loop Compensation
- AC Line Monitoring Circuit & AC Phase Detection
- Near Unity Power Factor in All Operating Modes
- PFC OK Indicator
| Benefits - Enables High Efficiency & Compact Design
- Optimized Performance Across Power Levels
- Optimized Performance Across Power Levels
- Prevents Operation in Audible Range Complies with Energy Efficiency Regulatory Standards
- Cycle-by-Cycle Current Limit Without Hall Effect Sensor
- Simplifies Design & Reduces External Components
- Simplifies Design & Reduces External Components
- Complies with Energy Efficiency Regulatory Standards
- Allows Communication with Downstream Converter to Optimize System Performance
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Applications - Power Factor Correction
- Offline Power Supply
| End Products - Industrial Power Supplies
- Telecom 5G Power
- Networking Power
- Gaming Console Power Supplies
- UHD TV Power Supplies
- Computing Power Supplies
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