EUP9291 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – Synchronous Rectifier Controller

EUP9291
Synchronous Rectifier Controller
DESCRIPTION
The EUP9291 is a high performance controller used to
secondary side synchronous rectifier (SR).
The fundamental of EUP9291 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 EUP9291 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.
It is compatible with DCM, TM and CCM operation
FEATURES
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
APPLICATIONS
Switching Mode Power Supply(DCM, TM and
CCM)
Chargers for Smart Phones and Tablets
High Efficiency Auxiliary Power in Server
Desktop and Appliance Application
Typical Application Circuit
DS9291 Ver1.0 Jan. 2017
Figure 1. SOP-8 Typical Application
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