The LT1950 is a wide input range, forward, boost, flyback and SEPIC controller that drives an N-channel power MOSFET with few external components required. A resistor programmable duty cycle clamp can be used to generate a volt-second clamp for forward converter applications. An internal boost switcher is available for creating a separate supply for the output gate driver, allowing 10V gate drive from input voltages as low as 3V. The LT1950’s operating frequency can be set with an external resistor over a 100kHz to 500kHz range and a SYNC pin allows the part to be synchronized to an external clock. Additional programmability exists for leading edge blanking and slope compensation. A fast current sense comparator achieves 60ns current sense delay and the error amplifier is a true voltage mode error amplifier, allowing a wide range of compensation networks. An accurate shutdown pin with programmable hysteresis is available for undervoltage lockout and shutdown. The LT1950 is available in a small 16-Pin SSOP package. Applications * Telecom Power Supplies * Automotive Power Supplies * Portable Electronic Equipment * Isolated and Nonisolated DC/DC Converters * Wide Input Range: 3V to 25V * Programmable Volt-Second Clamp * Output Power Levels from 25W to 500W * Auxiliary Boost Converter Provides 10V Gate Drive from VIN as Low as 3V * Programmable Operating Frequency (100kHz to 500kHz) with One External Resistor * Programmable Slope Compensation * Programmable Leading Edge Blanking * ±2% Internal 1.23V Reference * Accurate Shutdown Pin Threshold with Programmable Hysteresis * 60ns Current Sense Delay * 2.5V Auxiliary Reference Output * Synchronizable to an External Clock up to 1.5 • fOSC * Current Mode Control * Small 16-Pin SSOP Package https://elecena.pl/product/245996/single-switch-pwm-controller-with-auxiliary-boost-converter 2007-03-01 https://elecena.pl/product/245996/single-switch-pwm-controller-with-auxiliary-boost-converter 2017-10-11 https://elecena.pl/product/245996/single-switch-pwm-controller-with-auxiliary-boost-converter 2025-01-22