DESCRIPTION

AP2358 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 15W range.

AP2358 offers complete protection coverage with automatic self-recovery feature including Cycle-by-Cycle current limiting (OCP), over load protection (OLP), VDD over voltage clamp and under voltage lockout (UVLO). Excellent EMI performance is achieved with 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.

The AP2358 is available in DIP7 package.

FEATURES

 Power on Soft Start Reducing MOSFET V DS

Stress

 Frequency shuffling for EMI

 Exte nded Burst Mode Control For Improved

Efficiency and Minimum Standby Power Design

 Audio Noise Free Operation

 Fixed 48 k H z Switching Frequency

 Internal Synchronized Slope Compensation

 Low V DD Sta rtup Current and Low Operating

Current

 Leading Edge Blanking on Current Sense Input

Good Protection Coverage With Auto

Self Recovery

 V DD Over Voltage Clamp and Under Voltage

Lockout with Hysteresis (UVLO)

 Line Input Compensated Cycle by Cycle

Over current Threshold Setting For Constant

Output Power Limiting Over Univer sal Input

Voltage Range

 Overload Protection (OLP)

 Over V oltage Protection (OVP)

 Available in DIP7 p ackage

APPLICATION

Offline AC/DC flyback converter for

 Battery Charger

 PDA power supplies

 Digital Cameras and Camcorder Adaptor

 VCR, SVR, STB, DVD&DVCD P layer SM

 Set Top Box Power

 Auxiliary Power Supply for PC and Server

 Open frame SMPS