Tailored for use in a synchronous forward converter with active clamp reset, the LT3753 primary side, current-mode PWM controller operates over an input voltage range of 8.5V to 100V, delivers up to 95% efficiency, and targets power levels up to 400W. A programmable volt-second clamp provides a safeguard for transformer reset that prevents saturation and protects the MOSFET. This function allows for transformer and MOSFET optimization, resulting in a reduced solution size. Other features include, no optocoupler required, programmable MOSFET turn-on delays, short-circuit protection, programmable volt-second clamp, selectable fixed operating frequency from 100 kHz to 500 kHz, synchronizable to external clock, and programmable OVLO and UVLO with hysteresis. Available in a TSSOP-38 package with several pins removed for high voltage spacing, price starts at $3.19 each/1,000. A datasheet is available at http://cds.linear.com/docs/en/datasheet/3753f.pdf
Linear Technology Corp.