OB OB2225MCP

OB2225M is a high performance, high precision and low cost PWM Power switch for non-isolated buck and buck-boost application. It combines a dedicated current mode PWM controller with a high voltage power Bipolar in SOP8 package. Its built-in error amplifier is optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA, constant voltage regulation of 12V at universal AC input can be guaranteed. Frequency reduction and burst mode control is implemented for high efficiency at light load. Good EMI performance is achieved with On-Bright proprietary frequency shuffling technique and soft base driver design. Low startup current and low operating current contribute to a reliable power on startup and low standby power consumption with OB2225M. Constant power operation is supported at over load application with OB2225M, which makes it suitable for small home appliance application where instant large power consumption is required such as start-up of a fan.

• Universal AC input range and 12V output voltage
• Constant power mode operation at over load application
• Low cost and less BOM for buck and buckboost applications
• Current mode control
• 40kHz (typical) maximum switching frequency
• Frequency-reduction and burst mode control for high efficiency
• Frequency shuffling for EMI improvement
• Power on soft-start
• Built-in Leading Edge Blanking (LEB)
• Cycle-by-cycle current limiting
• Output short-circuit protection
• VDD Under Voltage Lockout with Hysteresis
• VDD OVP
• On-Chip OTP

• Low power AC/DC offline SMPS for Small home appliance
• Linear regulator/RCC replacement