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LTC3722-1

Linear Technology
Part Number LTC3722-1
Manufacturer Linear Technology
Description Phase Modulated Full Bridge Controllers
Published Mar 4, 2010
Detailed Description FEATURES n Adaptive or Manual Delay Control for Zero Voltage Switching Operation n Adjustable Synchronous Rectification ...
Datasheet PDF File LTC3722-1 PDF File

LTC3722-1
LTC3722-1


Overview
FEATURES n Adaptive or Manual Delay Control for Zero Voltage Switching Operation n Adjustable Synchronous Rectification Timing for Highest Efficiency n Adjustable Maximum ZVS Delay n Adjustable System Undervoltage Lockout Hysteresis n Programmable Leading Edge Blanking n Very Low Start-Up and Quiescent Currents n Current Mode (LTC3722-1) or Voltage Mode (LTC3722-2) Operation n Programmable Slope Compensation n VCC UVLO and 25mA Shunt Regulator n 50mA Output Drivers n Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection n 5V, 15mA Low Dropout Regulator n 24-Pin Surface Mount GN Package APPLICATIONS n Telecommunications, Infrastructure Power Systems n Distributed Power Architectures n Server Power Supplies LTC3722-1/LTC3722-2 Synchronous Dual Mode Phase Modulated Full Bridge Controllers DESCRIPTION The LTC®3722-1/LTC3722-2 phase-shift PWM controllers provide all of the control and protection functions necessary to implement a high efficiency, zero voltage switched (ZVS), full bridge power converter.
Adaptive ZVS circuitry delays the turn-on signals for each MOSFET independent of internal and external component tolerances.
Manual delay set mode enables secondary side control operation or direct control of switch turn-on delays.
The LTC3722-1/LTC3722-2 feature adjustable synchronous rectifier timing for optimal efficiency.
A UVLO program input provides accurate system turn-on and turn-off voltages.
The LTC3722-1 features peak current mode control with programmable slope compensation and leading edge blanking, while the LTC3722-2 employs voltage mode control.
The LTC3722-1/LTC3722-2 feature extremely low operating and start-up currents.
Both devices include a full range of protection features and are available in the 24-pin surface mount GN package.
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TYPICAL APPLICATION VIN 36V TO 72V CIN R1 U1 U2 MA MC T1 LTC3722 MB MD L1 VOUT 12V L2 COUT RC...


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