UCC25701N

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Power Management Integrated Circuits (PMICs) are widely used in various applications and are continually being developed to provide improved performance and greater error tolerance. The UC25701N is an example of this, as it offers both AC-DC and DC-DC off-line switcher solutions. This article will discuss the different application fields of this product, as well as its working principle in power management for low-power systems.

The UC25701N is a low-power, single-stage power conversion solution that can supply up to 65W of continuous output power when connected to an AC mains and up to 39.2W of continuous output power when connected to a DC source. This product is ideal for powering small, low-power loads, such as devices found in consumer electronics and automotive applications. The working voltage of the product is wide, with an adjustable output voltage range of 1.5 to 17Vdc.

In terms of application fields, the UC25701N is the perfect choice for powering small, off-line ac/dc LED drivers and LED Bulbs, such as Emergency LED Bulbs, Strip Lights, and Spot Lights. Other applications include Plug-In Chargers, Automotive Lamps, and other electronic products that require low-power solutions. It can also be used for powering mobile handsets, chargers for PDA or other similar small-scale power systems.

The UC25701N works by converting AC mains or DC sources into a voltage suitable for direct connection to a low-power load. The design of the product ensures that energy efficiency is optimized. The product employs a “Constant Current Resonance (CCR)” converter topology, which reduces both switching losses and peak current stress on the primary switches. The device also includes several current protection features to make it even more reliable and safe while operating.

In operation, the UC25701N uses a voltage differential feedback loop which is composed of an opto-coupler and a sense resistor to maintain output stability. The feedback loop is used to detect any variations in the output voltage, which then cause the pulse frequency modulation (PFM) control to increase or decrease the load current accordingly. The PFM control determines the precise switching period, which enables the output voltage to stay at a precise level and prevent any over/under voltage conditions.

Overall, the UC25701N is an excellent, low-power off-lineDC-AC converter that is suitable for driving small-scale electrical loads, such as LED Bulbs and other lighting solutions, Plug-In Chargers, Automotive Lamps, and other electronic products. The wide working voltage range, current protection features, and precise output stability make this product an ideal solution for powering both AC mains and DC sources.

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