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Low Power Offline PWM Current Mode Controller with Brown-Out Protection
NCP1256
The NCP1256 includes everything to build cost−effective switch mode power supplies ranging from a few watts up to several tens of watts. Housed in a tiny TSOP−6 package, the part can be supplied up to 30 V. It hosts a jittered 65 or 100−kHz switching circuitry operated in peak current mode control. When the power in the secondary side starts decreasing, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while freezing the peak current.
NCP1256 comes with several protection features such as a timer−based auto−recovery short circuit protection, lossless OPP, and an easily adjustable Brown Out (BO) pin.
NCP1256 Datasheet
