STR-W6700

STR-W6700 Series Application Note (Ver0.3) Japanese: Sept. 02 English: Oct. 02 Preliminary SANKEN ELECTRIC CO., LTD. Application Engineering Department -1 Semiconductor Operations Free Datasheet http://www.Datasheet4U.com STR-W6700 Series Contents 1. Introduction …………………………………………………………………………… P.3 2. Features ………………………………………………………………………………... P.3 3. STR-W6700 Series Line- up ………………………………………………………… 4. Outline Drawings (LF2003) …………………………………………………………. P.3 P.4 5. Block Diagram ………………………………………………………………………… P.5 6. Electrical Characteristics (Example STR-W6756) ………………………………. P.6 7. Applicable Circuit (Example) ……………………………………………………….. P.8 8. Functions of Each Terminal ………………………………………………………… P.9 8.1. Vcc Terminal (Pin 4) …………………………………………………………… P.9 8.2. SS/OLP Terminal (Pin 5) ……………………………………………………… P.12 8.3. FB Terminal (Pin 6) ……………………………………………………………. P.15 8.4. OCP/BD Terminal (Pin 7) …………………………………………………….. 8.5. Quasi-Resonant and Bottom-Skip Operation ……………………………. 8.6. Stand-By Operation …………………………………………………………... 8.7. Step-Drive Circuit ……………………………………………………………... P.16 P.17 P.19 P.21 8.8. Maximum ON Time Controlling Function …………………………………. P.21 2 iVer.0.3 j Free Datasheet http://www.Datasheet4U.com 1 Introduction The STR-W6700 series is a Hybrid IC (HIC) designed for Quasi-Resonant type Switching Mold Power Supply built-in a Power MOSFET and Control IC. At the normal operation, the HIC provides high efficiency and low noises by the Bottom-Skip Quasi-Resonant Operation...