OB2263AP Current Mode PWM Controller IC 60–70kHz Flyback AC-DC Converter DIP-8

The OB2263AP is a current-mode PWM controller IC designed for offline flyback AC-DC power supply applications. Manufactured by On-Bright Electronics, the device integrates PWM control and protection functions for compact switching power supply designs. The OB2263AP is supplied in a Pb-free DIP-8 package, making it convenient for through-hole PCB assembly, prototyping, repair, and educational electronics projects.

This power management IC operates with a 10V to 30V supply range and uses a programmable switching frequency in the approximately 60kHz to 70kHz range, depending on the external timing components. It is intended for flyback converter designs and supports a maximum duty cycle of approximately 75%.

The OB2263AP includes several features useful for reliable SMPS development, including cycle-by-cycle over-current protection, overload protection, under-voltage lockout, VDD over-voltage clamping, leading-edge current-sense blanking, and internal slope compensation. Its gate-drive output is internally clamped to help protect the external power MOSFET.

The controller also uses frequency-shuffling technology and extended burst-mode operation to help improve EMI performance and reduce switching losses during light-load or no-load conditions. These features make the OB2263 suitable for compact offline flyback power supply applications such as power adapters, battery chargers, set-top boxes, and open-frame SMPS designs.

For Bangladeshi electronics students, engineers, technicians, and DIY power-supply builders, the OB2263AP DIP-8 IC can be useful when studying or repairing switching-mode power supplies. Its through-hole DIP-8 format is particularly convenient for breadboard-style experimentation, PCB prototyping, and replacement of compatible PWM controller ICs. Always verify the original circuit, pin configuration, transformer design, feedback network, and protection components before replacing an SMPS controller.

The OB2263 family is available in different package options, while OB2263AP specifically identifies the DIP-8 version. The DIP-8 pin configuration includes GATE, VDD, NC, SENSE, RI, NC, FB, and GND.

Note: This is an offline AC-DC PWM controller intended for power supply circuits. Designs connected directly to mains voltage require appropriate isolation, PCB creepage/clearance, fusing, insulation, and electrical safety practices.

Specifications:

Specifications should be checked against the latest manufacturer datasheet before production use.

Features:

• Current-mode PWM control
• Programmable switching frequency
• 60–70kHz switching-frequency range
• 10–30V operating supply range
• DIP-8 through-hole package
• Flyback converter support
• Cycle-by-cycle over-current protection
• Overload protection
• Under-voltage lockout
• VDD over-voltage clamp
• Internal slope compensation
• Leading-edge current-sense blanking
• Extended burst-mode operation
• Frequency-shuffling technology for improved EMI performance
• Gate-drive voltage clamp
• Suitable for offline SMPS applications

Applications:

• AC-DC switching power supplies
• Flyback SMPS
• Power adapters
• Battery chargers
• Set-top box power supplies
• Open-frame power supplies
• Consumer electronics power supplies
• SMPS repair and replacement
• Electronics laboratory projects
• Power electronics education and prototyping