OB2358 Datasheet PDF – Current Mode PWM Power Switch

Part Number: OB2358, OB2358AP

Function: Current Mode PWM Power Switch

Package :  DIP 8 Pin type

Manufacturer: On-Bright Electronics





The OB2358 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 27W range. OB2358 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 On-Bright proprietary frequency shuffling technique together with soft switching control at the totem pole gate drive output.






1. Power on Soft Start Reducing MOSFET Vds Stress
2. Frequency shuffling for EMI
3. Extended Burst Mode Control For Improved Efficiency and Minimum Standby Power Design
4. Audio Noise Free Operation
5. Fixed 50KHZ Switching Frequency
6. Internal Synchronized Slope Compensation
7. Low VDD Startup Current and Low Operating Current

Application Circuit



1. Offline AC/DC flyback converter

2. AC/DC adaptor

3. PDA power supplies

4. Digital Cameras and Camcorder Adaptor

OB2358 Datasheet

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