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NCP1680 Totem-Pole CRM Power Factor Correction Controller
onsemi's critical conduction mode (CRM) controller is suitable for applications including a variety of power supplies
onsemi's NCP1680 is a bridgeless, totem-pole CRM power factor correction (PF) controller IC that is designed to drive the bridgeless totem-pole PFC topology. The PFC architecture 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.
Features
- Totem-pole PFC topology eliminates the input diode bridge
- Enables high efficiency and a compact design
- CRM operation
- Optimized performance
- Discontinuous conduction mode (DCM) with valley turn on under light-load conditions
- Prevents operation in the audible range
- Skip mode in very light-load conditions
- Complies with energy-efficiency regulatory standards
- Frequency foldback in DCM with 25 kHz minimum frequency
- Proprietary current sense scheme
- Cycle-by-cycle current limit without a Hall effect sensor
- Digital voltage loop compensation
- Simplifies design and reduces external components
- AC line monitoring circuit and AC phase detection
- Near unity power factor in all operating modes
- PFC OK indicator
Applications
- PFC
- Offline power supplies
- Industrial power supplies
- Telecom 5G power
- Networking power
- Gaming console power supplies
- UHD TV power supplies
- Computing power supplies
NCP1680 Totem-Pole CRM PFC Controllers
| Image | Manufacturer Part Number | Description | Voltage - Supply | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|
 |  | NCP1680AAD1R2G | TOTEM POLE CRITICAL CONDUCTION M | 30V | 2451 - Immediate | $47.99 | View Details |
| | NCP1680ABD1R2G | TOTEM POLE CRITICAL CONDUCTION M | 30V | 2198 - Immediate | $47.99 | View Details |
Published: 2022-01-07
Hong Kong, China