Application Note
STR-W6700 Series
Application Note (Ver0.3)
Japanese: Sept. 02 English: Oct. 02
Preliminary
SANKEN ELECTRIC CO., LTD.
A...
Description
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
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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...
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