onsemi NCP1256ASN65T1G

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.

• Fixed−frequency 65−kHz or 100−kHz Current−mode Control Operation
• Adjustable Over Power Protection (OPP) Circuit, Disabled at Low Line
• Adjustable Brown Out Level
• Frequency Foldback down to 26 kHz and Skip−cycle in Light Load Conditions
• Internally−fixed Slope Compensation Ramp
• Internally−fixed 4−ms Soft−start
• 70−ms Timer−based Auto−recovery Short−circuit Protection
• Frequency Jittering in Normal and Frequency Foldback Modes
• Double Hiccup Auto−recovery Short−circuit Protection
• Pre−short Ready for Latched OCP Option
• Latched/Auto−Recovery OVP Protection on Vcc
• Latched Inputs for Improved Robustness (OVP and OTP implementations)
• Auto−Recovery ac Line OVP Protection (E Version)
• +500 mA/-500 mA Source/Sink Drive Capability
• EPS 2.0 Compliant
• These are Pb−Free Devices

• Ac−dc Adapters for Portable Devices, Computers, Tablets etc.
• Auxiliary Power Supplies