Alternative Parts

Overview

Features and Benefits

  • 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

Product Details

The LTC1922-1 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 combines the benefits of the full-bridge 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 component tolerances for optimal performance.

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.

Applications

  • Telecommunications, Infrastructure Power Systems
  • Distributed Power Architectures
  • Server Power Supplies
  • High Density Power Modules

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC1922-1

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy


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