开关电源芯片

TNY264/266-268TinySwitch-II FamilyEnhanced, Energy Efficient,Low Power Off-line Switcher®Figure 1. Typical Standby Application.Product HighlightsTinySwitch-II Features Reduce System Cost•Fully integrated auto-restart for short circuit and openloop fault protection–saves external component costs•Built-in circuitry practically eliminates audible noise withordinary varnished transformer•Programmable line under-voltage detect feature preventspower on/off glitches–saves external components•Frequency jittering dramatically reduces EMI (~10 dB)–minimizes EMI filter component costs•132 kHz operation reduces transformer size–allows use ofEF12.6 or EE13 cores for low cost and small size•Very tight tolerances and negligible temperature variationon key parameters eases design and lowers cost•Lowest component count switcher solutionBetter Cost/Performance over RCC & Linears•Lower system cost than RCC, discrete PWM and otherintegrated/hybrid solutions•Cost effective replacement for bulky regulated linears•Simple ON/OFF control–no loop compensation needed•No bias winding–simpler, lower cost transformerEcoSmart®–Extremely Energy Efficient•No load consumption < 50 mW with bias winding and< 250 mW without bias winding at 265 VAC input•Meets Blue Angel, Energy Star, and EC requirements•Ideal for cell-phone charger and PC standby applicationsHigh Performance at Low Cost•High voltage powered–ideal for charger applications•High bandwidth provides fast turn on with no overshoot•Current limit operation rejects line frequency ripple•Built-in current limit and thermal protectionDescriptionTinySwitch-II maintains the simplicity of the TinySwitchtopology, while providing a number of new enhancements tofurther reduce system cost and component count, and topractically...