BM520Q15F-GE2 Integrated Circuits (ICs)

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PMIC, or Power Management Integrated Circuits (ICs), are an important component in today\'s complex and power hungry electronics devices. They integrate multiple power management functions, such as voltage regulation, current regulation, and thermal management, into single chips. One of the most commonly used PMIC solutions is the AC/DC converter or offline switcher. The BM520Q15F-GE2 is a type of offline switcher with a wide range of application fields.

The BM520Q15F-GE2 is a highly integrated single-chip offline LED PFC (Power Factor Correction) LED driver designed for LED lighting solutions. Its features include a wide input voltage range from 100 to 277V AC, up to 15W output power, up to 90% efficiency, internal active PFC function for enhanced power saving, current de-rating for derating the output to NO one, programmable output current and overcurrent protection, and low EMI operation. All these features make the BM520Q15F-GE2 an ideal choice for LED lighting applications.

The BM520Q15F-GE2 also provides various levels of protection against over voltage, short circuit and over temperature. Its high integration means low BOM cost and compact design. Additionally, it also has flexibility to support different topologies such as Boost and SEPIC. All these features make the BM520Q15F-GE2 an ideal choice for applications such as LED lighting, LCD TV, set-top boxes, gaming machines, and kitchen equipment.

The working principle of the BM520Q15F-GE2 is based on the Buck-Boost topology. Buck-Boost topology allows the output voltage to be lower or higher than the input voltage, which is why it is so widely used in applications with changing input voltage. In the BM520Q15F-GE2, a PFC integrated circuit is used to actively control the input current to the converter, thus enabling a high PF operation with energy savings. The PFC IC switches the power MOSFET on and off to regulate the input current, while a primary switch is used to drive the boost diode of converter.

The output of the converter is regulated by a secondary switch and a feedback loop. The secondary switch injects a ramp voltage to the output filter capacitor. The feedback loop senses the output voltage, and adjusts the switch frequency and duty cycle in order to maintain constant output voltage. Finally, the output current is limited by an over current protection circuit.

The BM520Q15F-GE2 is an ideal solution for LED lighting applications that require high efficiency and power saving. Its wide range of features and protection make it an ideal choice for a variety of applications, such as LCD TV, set-top boxes, gaming machines, and kitchen equipment. Its high integration and low BOM cost make it an even more attractive choice for designers who are looking for a reliable and cost-effective solution.

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