OB2365xCP

GENERAL DESCRIPTION

OB2365x 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.

OB2365x offers comprehensive protection coverage with auto-recovery including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD under voltage lockout (UVLO) and internal  over temperature protection (OTP).  Excellent EMI performance is achieved with On-Bright proprietary frequency shuffling technique.

The tone energy at below 23KHz is minimized in the design and audio noise is eliminated during operation.

OB2365x is offered in SOP8 package.

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

FEATURES

■   Standby power < 75mW at universal AC input

■   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 65KHZ (typical) switching frequency

■   Internal synchronized slope compensation

■   Low VDD startup current and low operating current

■   Leading edge blanking on current sense input

■   Comprehensive protection coverage

o    VDD Under Voltage Lockout with hysteresis (UVLO)   

o    VDD Over Voltage Protection (VCC OVP)  

o    Cycle-by-cycle over current threshold setting for constant output power limiting over universal input voltage range

o    Over Load Protection (OLP) with auto-recovery

o    Output diode short protection with auto-recovery

   

TYPICAL APPLICATION