KA3883C

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KA3883C

KA3883C is an integrated circuit (IC) in the category of voltage regulators. Specifically, it belongs to the family of DC DC switching controllers, which mainly includes switchers, DC-DC converters, AC-DC converters, Battery Chargers and LED controllers. It is designed to provide a high current drive capability in a low cost, low profile and simplified circuit organization. KA3883C provides superior, stable and continuous output current regulation across all load conditions.

Application Field

KA3883C is mainly used in step-down (buck) converters, which are typically used to convert a higher input voltage (e.g. 24V, 48V or higher) to a lower output voltage (e.g. 5V, 3.3V or lower). These converters are widely used in a variety of systems such as computers, consumer electronics, medical electronics, transportation and other industrial applications. KA3883C is also commonly used in mobile device chargers, smart home devices, desktop power supplies and other power management applications.

Working Principle

KA3883C is a multi-phased DC-DC switching controller. It uses multiple switching phases to achieve current-mode control of high current, fast transient response and wide input voltage range. Ths switching operation is enabled and disabled by the current shunt comparator and a logic input signal. To achieve current-mode control, the current feedback signal is used to control the switching on and off timing. This ensures that the output current is constant during different load conditions.

KA3883C also contains many features and functions, such as soft-start, frequency modulation, over-voltage protection, thermal shutdown and thermal folding protection, current sense pin with over-current protection, discharge pin to eliminate bootstrap capacitor, and adjustable current limiter. These features, together with the high-performance switching control, make KA2883C an excellent solution for high current output regulation applications.

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