PN8148
Extended power flyback controller with built-in 700V MOSFET for 24-36W adapter and charger applications
Product Overview
Description
The PN8148 is a high-power version of the PN8147, featuring a larger built-in 700V MOSFET capable of delivering 24-36W output power. It maintains all the features of the PN8147 including QR operation and comprehensive protection.
Designed for higher power adapter applications such as notebook chargers and larger appliance power supplies, the PN8148 offers excellent efficiency and thermal performance in a compact SOP-7 package.
The device includes advanced features like frequency foldback for light load efficiency, burst mode for ultra-low standby power, and built-in soft-start to reduce stress on power components during startup.
Product Series
PN
Primary Application
Notebook adapters
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Input Voltage | 85-265VAC |
|---|---|
| Output Power | 24-36W |
| MOSFET Voltage | 700V |
| Standby Power | <75mW |
| Operating Frequency | 65kHz |
| Package | SOP-7 |
Applications
Notebook adapters
Electronic system design
High-power chargers
Battery and charging management
Appliance power supplies
Electronic system design
Industrial auxiliary power
Industrial automation and control
FAE Expert Insights
"The PN8148 extends the capabilities of the PN8147 to higher power levels while maintaining the same ease of use. I've successfully used this device in 30W notebook adapter designs with excellent results. The larger MOSFET provides better thermal margin, and the QR operation keeps efficiency above 87% even at high line. For thermal management, ensure adequate copper area for the drain pin and consider a small heatsink for continuous high-power operation. Contact FAE for thermal design support."
I highly recommend the PN8148 for its proven reliability and excellent performance in real-world applications.
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is the thermal performance of PN8148?
The PN8148 has lower Rds(on) than PN8147, resulting in better thermal performance. At 30W output with universal input, typical MOSFET temperature rise is 40-50°C above ambient with adequate PCB copper area.
For high ambient temperatures, consider additional heatsinking.
Can PN8148 be used for 45W applications?
While the absolute maximum ratings may allow brief operation at 45W, continuous operation above 36W is not recommended as it may exceed thermal limits and reduce reliability. Consider higher power solutions for 45W+ applications.
Contact FAE for recommendations for >36W applications.
What is the difference between PN8147 and PN8148?
The main difference is the built-in MOSFET current rating. PN8148 has a larger die with lower Rds(on), allowing higher output power (24-36W vs 12-24W). Both share the same pinout and control features.
Choose PN8148 for >24W applications, PN8147 for <24W.
How do I optimize efficiency at light loads?
The PN8148 automatically enters frequency foldback and burst mode at light loads. For further optimization, minimize transformer leakage inductance and use synchronous rectification on the secondary side.
Consider PN8307 SR controller for maximum efficiency improvement.
What is the recommended transformer for 30W applications?
For 30W universal input designs, use EE22 or RM8 core with appropriate turns ratio. Primary inductance typically ranges from 1.2mH to 1.8mH depending on specific design requirements. For detailed specifications and application support on chipown PN8148, refer to the datasheet or contact our team.
Our FAE can provide transformer design support.