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Efficient Integrated Off-Line Switcher (TO220)

2015-09-15 10:44  
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This article describes the Efficient Integrated Off-Line Switcher (TO220). The principle is very simple, very practical. The circuit components can help you understand better grasp this principle. For example, in this circuit, you can go to find and buy these components: TO220.circuit diagram off line switcher 

TOPSwitch-JX cost effectively incorporates a 725 V powerMOSFET, high voltage switched current source, multi-modePWMcontrol, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device. Product Highlights EcoSmart? – Energy Efficient.

High Design Flexibility for Low System Cost
Extensive Protection Features
Advanced Package Options
Energy efficient over entire load rangeNo-load consumption below 70 mW at 230VACachievableUp to 750 mW standby output power for 1 W input at 230VACMulti-modePWMcontrol maximizes efficiency at all loads132 kHz operation reduces transformer and power supply size66 kHz option for highest efficiency requirementsAccurate programmable current limitOptimized line feed-forward for line ripple rejectionFrequency jittering reducesEMIfilter costFully integrated soft-start for minimum startup stress725 V ratedMOSFETSimplifies meeting design derating requirementsAuto-restart limits power delivery to <3% during overload faultsOutput short-circuit protection (SCP)Output overcurrent protection (OCP)Output overload protection (OPP)Output overvoltage protection (OVP)User programmable for hysteretic/latching shutdownSimple fast AC resetPrimary or secondary sensedLine undervoltage (UV) detection prevents turn-off glitchesLine overvoltage (OV) shutdown extends line surge withstandAccurate thermal shutdown with large hysteresis (OTP)eDIP?-12 package:Low profile horizontal orientation for ultra-slim designsHeat transfer to bothPCBand heat sinkOptional external heat sink provides thermal impedance equivalent to a TO-220eSIP?-7C package:Vertical orientation for minimumPCBfootprintSimple heat sink mounting using clip provides thermal impedance equivalent to a TO-220eSOP?-12 package:66 W universal input output power capabilityLow profile surface mounted for ultra-slim designsHeat transfer toPCBvia exposed pad andSOURCEpinsSupports wave or reflow soldering

 


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