OB2263MP SOT23-6 PWM Controller IC is a current-mode PWM controller designed for low-power offline flyback switching power supplies. It integrates the essential control and protection functions required to build compact and efficient AC-DC power supply circuits.

The OB2263MP uses current-mode PWM control to regulate the external power MOSFET. Its GATE output drives the MOSFET, while the SENSE pin monitors the switching current and provides cycle-by-cycle current limiting.

The IC features programmable switching frequency through the RI pin and incorporates frequency-shuffling technology to help improve electromagnetic interference (EMI) performance. Its extended burst-mode operation helps reduce power consumption under light-load and standby conditions.

OB2263MP also includes several protection functions, including over-current protection, overload protection, under-voltage lockout (UVLO), VDD voltage clamping and gate-output protection. These features make it suitable for compact and reliable offline flyback converters.

The MP version is available in a compact SOT23-6 package, making it useful for space-constrained SMPS designs and electronic equipment where a small PCB footprint is required.

Key Features

• Current-mode PWM controller
• Compact SOT23-6 package
• Designed for offline flyback converters
• Programmable switching frequency
• Frequency-shuffling technology for improved EMI performance
• Extended burst-mode operation
• Low startup current
• Low operating current
• Internal slope compensation
• Leading-edge blanking
• Cycle-by-cycle current limiting
• Over-current protection
• Overload protection
• Under-voltage lockout (UVLO)
• VDD voltage clamp
• Gate-drive voltage protection
• Automatic self-recovery protection

Applications

OB2263MP can be used in a wide range of low-power switching power supply applications, including:

• AC-DC adapters
• SMPS power supplies
• Battery chargers
• Set-top boxes
• Consumer electronic power supplies
• Open-frame power supplies
• Auxiliary power supplies
• Low-power flyback converters
• Compact offline power supplies
• Electronic equipment power supply circuits

Specifications