VP3881 Datasheet | Viva Electronics

Description Features The VP3881 is a versatile controller designed for - Wide Input Voltage from 2.97V to 60V use in Boost, SEPIC and Flyback power converter - Reference Voltage with ± 3.0% Accuracy and topologies that needs an external low-side N- - Adjustable 100k Hz~1MHz Clock Frequency MOSFET acting as primary switch. Besides cycle- - Wide Output Voltage up to 80V by-cycle current limiting, current mode control - 10μA Shutdown Current scheme also makes it wide bandwidth and good - 1A Peak Current Limit Using Internal Driver transient response. The current limit can be pro- - Current Mode Operation grammed simply with an external resistor. - Internal 4/2Ω MOSFET Switch - External RC pensation The switching frequency can be set in any value - Internal Soft-Start between 100k Hz and 1MHz with a resistor or any - High Efficiency at Light Loads external clock source. The VP3881 can be operat- - Cycle-By-Cycle Current Limit ed at high switching frequency to save the solu- - Over Temperature Protection tion board size. While entering shutdown mode, - Adjustable Input UVLO Threshold Voltage the VP3881 only sinks 10μA and it allows power - DFN10 3x3 Green Package with Ro HS pli- supply sequencing. It has built-in protection cir- ant cuits such as thermal shutdown, under-voltage lockout, short circuit protection, and overvoltage protection. Internal soft-start circuitry reduces the Applications inrush current at start-up. - Portable Speakers VP3881 is available in small DFN10 3x3 green package. - Offline Power Supply - Battery Powered Device - Automotive Typical Application - Photovoltaic Inverters VP3881 Rev A.01 1 http://.viva-elec..tw Functional Block Diagram FADJ UVLO FB P AGND Soft Start Slope pensation RAMP CLK Oscillator 1MHz Control Logic 1.275V Voltage Reference + Error...