LTC3722

The LTC3722’s adaptive technology is an innovative closed-loop control method for optimizing delay time. By sensing the bridge and input supply directly, the LTC3722 intelligently adapt to any change in load current, temperature, component drift, driver circuitry delay offset, or input voltage variation. The benefits are simpler design, higher efficiency, increased duty cycle capability, lower EMI and consistent performance without circuit tweaking. The LTC3722 allows the user to adjust the delay time to fix the transition delays or even implement specific dynamic timing schemes. Synchronous rectification of MOSFETs and the transformer’s secondary power stage are driven 180 degrees output of phase. This reduces voltage ripple and output capacitors as well as improving output capacitor reliability.

The LTC3722 features low startup, operating and quiescent current to ease the burden on external bias circuitry, and the circuit’s accurate 5V low dropout regulator provides up to 15mA to power auxiliary circuits. The LTC3722 is offered in two versions current mode (LTC3722-1) and voltage mode (LTC3722-2). Each is housed in a 24-lead SSOP package. They are priced at $5.50 each in 1,0000-piece quantities.

Summary of Features: LTC3722
Adaptive or Manual Delay control for Zero Voltage Switching
Adjustable Synchronous Rectification Timing for Highest Efficiency
Adjustable Maximum ZVS delay
Integrated Synchronous Rectification Control for Highest Efficiency
Output Power Levels from 200W to Kilowatts
Adjustable System Undervoltage Lockout and Hysteresis
Programmable Slope Compensation