g n i h tors c t i a Sw egul R
STR-W6756
Universal-Input/140 W Off-Line QuasiResonant Flyback Switching Regulator
The ...
g n i h tors c t i a Sw egul R
STR-W6756
Universal-Input/140 W Off-Line QuasiResonant Flyback Switching Regulator
The STR-W6756 is a quasi-resonant regulator specifically designed to satisfy the requirements for increased integration and reliability in switch-mode power supplies. It incorporates a primary control and drive circuit with an avalanche-rated power
MOSFET. The regulator exhibits only low-level high-frequency EMI noise because of soft switching of the
MOSFET close to ground (bottom point). A bottom-skip function minimizes an increase of operational frequency during light loads to improve system efficiency over the entire load range. Covering the power range from below 240 watts for a 230 VAC input, or 140 watts for a universal input (85 to 264 VAC), this device can be used in a range of applications, from DVD and VCR players to ac adapters for cellular phones and digital cameras. An auto-standby function, which is internally triggered by sensing on time, reduces power consumption at light load. An externally triggered standby mode reduces the input power further. Multiple protections, including the avalanche-energy-guaranteed
MOSFET, provide high reliability of system design. Cycle-by-cycle current limiting, under
voltage lockout with hysteresis, and over
voltage protection protect the power supply during the normal overload and fault conditions. Over
voltage protection is latched after a short delay. The latch may be reset by cycling the input supply. Low start-up ...