PN8307
High-performance synchronous rectifier controller for flyback converters up to 30W with DCM/CCM operation
Product Overview
Description
The PN8307 is a high-performance synchronous rectifier (SR) controller designed for flyback converter applications. It replaces the traditional Schottky diode rectifier with a MOSFET, significantly improving efficiency especially at low output voltages.
The device uses drain-source voltage sensing to determine the optimal turn-on and turn-off timing of the SR MOSFET, eliminating the need for a current sense resistor. Adaptive gate drive ensures fast switching with minimal dead time.
With its ability to operate in both DCM and CCM modes, the PN8307 is suitable for a wide range of flyback converter designs from light load to full load conditions.
Product Series
PN
Primary Application
High-efficiency adapters
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Output Current | Up to 5A |
|---|---|
| Operating Frequency | Up to 150kHz |
| Turn-off Delay | <30ns |
| Gate Drive Voltage | 10V |
| Standby Current | <200μA |
| Package | SOP-8 |
Applications
High-efficiency adapters
Electronic system design
Power supplies for 5V/9V outputs
Electronic system design
USB-PD applications
Electronic system design
Battery chargers
Battery and charging management
FAE Expert Insights
"The PN8307 is a game-changer for improving flyback converter efficiency, especially at 5V output where diode losses are significant. I've seen efficiency improvements of 3-5% when replacing Schottky diodes. The voltage sensing approach eliminates the power loss of current sense resistors. Pay attention to PCB layout - keep the sense pins close to the MOSFET and minimize parasitic inductance in the gate drive loop for optimal performance. Contact FAE for SR design guidance."
I highly recommend the PN8307 for its proven reliability and excellent performance in real-world applications.
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is the maximum output current?
The PN8307 can support up to 5A output current with proper MOSFET selection and thermal design. For higher current, consider PN8307H which supports up to 10A. For detailed specifications and application support on chipown PN8307, refer to the datasheet or contact our team.
Choose PN8307H for applications >5A output current.
How do I select the SR MOSFET?
Select MOSFET with voltage rating at least 1.5x output voltage and current rating higher than maximum output current. Consider Rds(on) vs. gate charge for optimal efficiency. For detailed specifications and application support on chipown PN8307, refer to the datasheet or contact our team.
Contact FAE for SR MOSFET recommendations.
What is the turn-off delay?
Typical turn-off delay is less than 30ns, ensuring minimal reverse current through the SR MOSFET. Fast turn-off is critical for preventing shoot-through in CCM operation. For detailed specifications and application support on chipown PN8307, refer to the datasheet or contact our team.
Suitable for both DCM and CCM applications.
Can it work in CCM mode?
Yes, PN8307 supports both DCM and CCM operation, making it suitable for various flyback converter designs. The adaptive control automatically adjusts for different operating modes. For detailed specifications and application support on chipown PN8307, refer to the datasheet or contact our team.
No mode selection needed - automatic detection.
What is the recommended PCB layout?
Keep sense pins close to MOSFET drain and source. Minimize gate drive loop area. Use Kelvin connection for sense pins to avoid voltage drop errors. For detailed specifications and application support on chipown PN8307, refer to the datasheet or contact our team.
Request PCB layout guidelines from FAE.