GENERAL DESCRIPTION
OB2354L combines a dedicated current mode
PWM controller with a high voltage power
MOSFET. It is optimized for high performance, low
standby power, and cost effective off-line flyback
converter applications in sub 16W range.
OB2354L offers complete protection coverage
with automatic self-recovery feature including
Cycle-by-Cycle current limit
ing (OCP), over load
protection (OLP),
 
over temperature protection
(OTP), over voltage protection and VDD under
voltage lockout (UVLO).  Excellent EMI
performance is achieved with On-Bright
proprietary frequency shuffling technique together
with soft switching control at the totem pole gate
drive output.
The tone energy at below 20KHZ is minimized in
the design and audio noise is eliminated during
operation.
OB2354L is offered in DIP8 package.

FEATURES

Power on Soft Start Reducing MOSFET Vds
Stress 

Frequency shuffling for EMI

Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power
Design

Audio Noise Free Operation

Fixed 50KHZ Switching Frequency

Internal Synchronized Slope Compensation

Low VDD Startup Current and Low Operating
Current 

Leading Edge Blanking on Current Sense
Input

Good Protection Coverage With Auto Self-
Recovery

 VDD Under Voltage Lock
out with Hysteresis
(UVLO)
       
 
 Over Temperature Protection (OTP)

 On-Bright Proprietary Line Input
Compensated

APPLICATIONS
Offline AC/DC flyback converter for

AC/DC adapter

PDA power supplies

Digital Cameras and Camcorder Adapter

VCR, SVR, STB, DVD&DVCD Player SMPS

Set-Top Box Power

Auxiliary Power Supply for PC and Server

Open-frame SMPS