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NCP1256

ON Semiconductor
Part Number NCP1256
Manufacturer ON Semiconductor
Description Low Power Offline PWM Controller
Published Aug 9, 2019
Detailed Description Low Power Offline PWM Current Mode Controller with Brown-Out Protection NCP1256 The NCP1256 includes everything to buil...
Datasheet PDF File NCP1256 PDF File

NCP1256
NCP1256

Overview
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.
Two inputs are provided to latch off the part in a practical way, for instance with OVP and OTP events.
Several options exists to chose latch or auto−recovery for these events.
Features • Fixed−frequency ...


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