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EUP9290
Synchronous Rectifier ControllerDescription
The EUP9290 is a high performance controller used to secondary side synchronous rectifier (SR).
The fundamental of EUP9290 is utilized N-channel MOSFET power devices used for secondary side synchronous to emulate a near-ideal diode rectifier. This method not only directly reduces power dissipation of the rectifier but also reduces primary side losses as well.
The EUP9290 is applied voltage-second balancing control method and not directly connected to the MOSFET drain, so it is ideal for flyback power supplies over the wide-output voltage range. The SR drive turn-off threshold is not related to the MOSFET RDS(on), which allows optimizing for maximum conduction time.
The EUP9290 offers a frequency detector to automatically switch to standby mode during low power conditions and pin fault protections. It is compatible with DCM, TM and CCM operation
Feature
- •Secondary-Side SR Optimized Controller for 5V to 24V Flyback Systems
- •Volt-Second Balance SR On-Time Control
- •Compatible with Primary-Side and Second-Side Control
- •CCM Operation Compatibility
- •Short Pin Fault Protection
- •Available in SOP-8 and SOT23-6 Packages
- •RoHS Compliant and 100% Lead (Pb)-Free
- Halogen-Free
Application
- •Switching Mode Power Supply(DCM, TM and
- CCM)
- •Chargers for Smart Phones and Tablets
- •High Efficiency Auxiliary Power in Server
- Desktop and Appliance Application