The PN3865 is high performance AC to DC power supply control device with primary sensing regulation technology. This device includes an internal power device and operates in valley on mode to provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying EMI design, and lowering the total bill of material cost. The PN3865 removes the need for secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for loop compensation components while maintaining stability in all operating conditions. The built-in power limit function enables optimized transformer design in universal off-line applications and allows for a wide input voltage range.
Pri-energy Micro-Electronics’s proprietary technology ensures that power supplies built with the PN3865 can achieve highest average efficiency and very tight output voltage and current regulation, with a wide range of output voltage (typical 5V, 12V, 48V and others).
The device incorporates an 650 V MOSFET, adjustable cable compensation, audible noise suppression by adjustable peak current, frequency jittering, and hysteretic thermal shutdown circuitry into one power switcher.
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