Part Number : STR-X6556
Function : SANKEN – ZIP 7 pin
Manufacturers : Sanken Electric co.,ltd.
Other data sheets within the file : STRX6556
The STR-X6729 is a quasi-resonant topology IC designed for SMPS applications. It shows lower EMI noise characteristics than conventional PWM solutions, especially at greater than 2 MHz. It also provides a soft-switching mode to turn on the internal MOSFET at close to zero voltage (VDS bottom point) by use of the resonant characteristic of primary inductance and a resonant capacitor.
The package is a fully molded TO-3P, which contains the controller chip (MIC) and MOSFET, enabling output power up to 460 W at 120 VAC input. The bottom-skip mode skips the first bottom of VDS and turns on the MOSFET at the second bottom point, to minimize an increase of operating frequency at light output load, improving system-level efficiency over the entire load range.