onsemi NCP1568 PWM controller
AC-DC active clamp flyback PWM controller
The NCP1568 is a highly integrated AC-DC PWM controller designed to implement an active clamp flyback topology.
It employs a proprietary variable frequency algorithm to enables zero voltage switching (ZVS) of the MOSFETs across line & load conditions. The ZVS feature allows high-frequency operation increasing the power density of a power converter while achieving high efficiency.
An HV startup circuit, a strong low side driver, and a 5V logic level driver for active clamp FET, including SJ FETs and GaN FETs, are integrated.
Key features
- Active clamp flyback topology
- Multi-mode operation and programmable control scheme
- Enables high power density designs
- Enhanced light load efficiency
Additional features
- Active clamp flyback topology aids in Zero Voltage Switching (ZVS)
- Proprietary multi-mode operation to enhance light load efficiency
- Proprietary adaptive ZVS allows high-frequency operation while reducing EMI
- Inbuilt adaptive dead-time for both main and active clamp FETs
- Peak current-mode control with inbuilt slope compensation with options
- Flexible control scheme and programmability allow for configuration with either external silicon or GaN FETs
- Customer programmable optional transition to DCM
- Integrated frequency foldback with minimum frequency clamp for highest performance in standby mode
- Minimum frequency clamp and quiet skip eliminates audible noise
- Standby power less than 30 mW
- Integrated high voltage and startup circuits
- Integrated drivers
- Programmable frequency from 100 kHz to 1 MHz
- A set of protection features
Applications
- AC-DC Power Conversion
- Industrial Power Supplies
- USB Type C Power Delivery
- High Density Notebook & Mobile Adapters
ebv content library/npi/2021/onsemi-ncp1568
onsemi NCP1568 PWM Controller | EBV Elektronik
