STR-W6700 Datasheet | Sanken

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 - i Ver.0.3 - j Free Datasheet http://.. 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, and low power consumption is also achieved by the blocking (intermittent) oscillation at stand-by mode. The HIC adopts 6 pins full-mold package (TO220F-6L, Sanken Package Type No.: FM207) and is suitable for downsizing and standardizing of a SMPS having a limited mounting space. Furthermore, the HIC is made possible to ease circuit design with a small number of external parts, and it also makes possible to miniaturize and standardize the SMPS. Features 1). The operation mode turns blocking oscillation by reducing output voltage at stand-by mode. 2). In addition to the existing Quasi-Resonant Operation, the Bottom-Skip Function is added in order to be efficient from light to medium load. 3). Soft-Start Operation is provided at the SMPS start-up. 4). Switching noise is reduced by Step-Drive Function. 5)....