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OB2220P is a high performance, high precision and low cost PWM Power switch for non-isolated buck and buck-boost application. It combines a dedicated currentmode PWM controller with a high voltage power Mosfet 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 DC 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 gate driver design. Low startup current and low operating current contribute to a reliable power on startup and low standby power consumption with OB2220P.
OB2220P offers power on soft start control and protection coverage with auto-recovery features including cycle-by-cycle current limiting, output short circuit protection, VDD Over Voltage Protection (OVP), Over Loading Protection(OLP) and VDD Under Voltage Lockout Protection (UVLO).
The tone energy at below 25KHz is minimized in the design so that audio noise is eliminated during operation.
OB2220P is offered in SOP8 package.
Universal 20-200VDC input range and 12V output voltage
Less BOM for buck and buck-boost applications
Current mode control
50kHz (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
Over Loading Protection
Low power DC offline SMPS for
Electric-vehicle, electric-bicycle appliance
Linear regulator/RCC replacement
