特点
Adaptive DirectSense? Zero Voltage Switching
Integrated Synchronous Rectification Control for Highest Efficiency
Output Power Levels from 50W to Kilowatts
Very Low Start-Up and Quiescent Currents
Compatible with Voltage Mode and Current Mode Topologies
Programmable Slope Compensation
Undervoltage Lockout Circuitry with 4.2V Hysteresis and Integrated 10.3V Shunt Regulator
Fixed Frequency Operation to 1MHz
50mA Outputs for Bridge Drive and Secondary Side Synchronous Rectifiers
Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection
5V, 15mA Low Dropout Regulator
20-Pin PDIP and SSOP Packages
典型应用
典型应用
描述
The LTC1922-1 also provides secondary side synchronous rectifier control. The device uses peak current mode control with programmable slope comp 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.