OB2223CPA

OB2223 is a high performance, high precision and low cost PWM Power switch for Non-isolated buck/ buck-boost and flyback application. It combines a dedicated current mode PWM controller (with a high voltage power MOSFET with SOP8/DIP8 package) and built-in error amplifier optimized for good overshoot and dynamic response for low cost and component count. With precise inner resistor divider, precise reference of EA, accurate constant voltage regulation 12V at universal AC input can be guaranteed. For high efficiency, oscillator with frequency-reduction and burst mode control is implemented. And EMI performance is achieved with On-Bright proprietary frequency shuffling technique and soft gate driver design. OB2223 offers power on soft start control and protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, Over Loading Protection, Output Short-Circuit Protection, On-Chip OTP, VDD OVP, and UVLO. OB2223 is a cost effective PWM power switch optimized for off-line Non-isolated buck/ buck-boost and flyback applications including electrical appliance and linear regulator replacement. It operates in current mode and regulates output voltage with dedicated features. High integration can afford low cost and component count solution.

Applications

• Low Power AC/DC offline SMPS for Electrical Appliance
• Linear Regulator/RCC Replacement

Key features

• Low cost and component count buck application
• Current Mode Control
• Multiple mode control with good dynamic response
• Oscillator of fixed maximum switching frequency with 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
• Over Loading Protection
• Output Short-Circuit Protection
• VDD Under Voltage Lockout with Hysteresis (UVLO)
• VDD OVP
• On-Chip OTP