LTC1922-1 Datasheet | Linear Technology

Synchronous Phase Modulated Full-Bridge Controller Features DESCRIPTIO s Adaptive Direct Sense TM Zero Voltage Switching s Integrated Synchronous Rectification Control for Highest Efficiency s Output Power Levels from 50W to Kilowatts s Very Low Start-Up and Quiescent Currents s patible with Voltage Mode and Current Mode Topologies s Programmable Slope pensation s Undervoltage Lockout Circuitry with 4.2V Hysteresis and Integrated 10.3V Shunt Regulator s Fixed Frequency Operation to 1MHz s 50m A Outputs for Bridge Drive and Secondary Side Synchronous Rectifiers s Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection s 5V, 15m A Low Dropout Regulator s 20-Pin PDIP and SSOP Packages U APPLICATIO S s Telemunications, Infrastructure Power Systems s Distributed Power Architectures s Server Power Supplies s High Density Power Modules The LTC®1922-1 phase shift PWM controller provides all of the control and protection functions necessary to implement a high performance, zero voltage switched, phase shift, full-bridge power converter with synchronous rectification. The part is ideal for developing isolated, low voltage, high current outputs from a high voltage input source. The LTC1922-1 bines the benefits of the fullbridge topology with fixed frequency, zero voltage switching operation (ZVS). Adaptive ZVS circuity controls the turn-on signals for each MOSFET independent of internal and external ponent tolerances for optimal performance. The LTC1922-1 also provides secondary side synchronous rectifier control. The device uses peak current mode control with programmable slope p and leading edge blanking. The LTC1922-1 Features extremely low operating and start-up currents to simplify off-line start-up and bias circuitry. The LTC1922-1 also includes a full range of protection Features and is available in 20-pin through hole (N) and surface mount (G) packages. , LTC and LT are registered trademarks of Linear...