CS51220EDR16

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CS51220EDR16 Application Field and Working Principle

CS51220EDR16 is a DC-DC switching controller designed to provide efficient power conversion solutions in the fields of automotive and industrial electronics. It provides a compact, flexible solution for a broad range of applications including telecom and networking, automotive, and medical.

Features of CS51220EDR16

CS51220EDR16 has built-in safety features for key power supplies, as well as built in thermal protection and ESD protection. It integrates all monitoring, control and protection functions, as well as over-current, under-voltage and over-voltage protection. It also provides accurate output voltage with the option to easily tune and set levels to the desired voltage. The design enables low-cost transfer of power using a single chip and voltage regulator.

Key Applications

CS51220EDR16 is suitable for wide range of applications including automotive and industrial, and is easily applied to switch mode power converters such as, buck, boost, flyback, SEPIC, and forward converters. It is also applicable in telecom switch mode power supplies, as well as industrial systems, such as white goods, medical, and automotive. Additionally, it can be used for high-efficiency non-isolated dc-dc power supplies for 3G, dual band, audio output, USB charging and other applications. The CS51220EDR16 provides a very low quiescent current and low power consumption that allows for a very small, portable and lightweight design.

Working Principle

The CS51220EDR16 offers a low-side switching architecture, with a high-side current limit (or over-current protection) for the high side switch, an integrated pulse control and a separate pulse-by-pulse control. The DC-DC switching controller can operate between two power supplies, capable of both step-up and step-down conversion. The internal Pulse Frequency Modulation (PFM) control with the external logic provides active frequency control. The PFM rate is adjusted according to the sensed or programmed output voltage or load. The CS51220EDR16 operates at high efficiency and low audible noise by responding to the input/output load conditions.

The integrated novel Pulse-by-Pulse (PBP) control reduces the current and voltage overshoot at the output, reducing the stress on the system due to high frequency current ripple. Additionally, it eliminates the need for external components. For additional protection, the device includes integrated cycle-by-cycle over-current protection and temperature protection.

Conclusion

The CS51220EDR16 is an integrated DC-DC switching controller. It integrates all monitoring, control and protection functions, as well as over-current, under-voltage, and over-voltage protection that can easily provide efficient power conversion solutions in the fields of automotive, industrial, telecom and networking. It offers low-power consumption and supports higher load current range. This makes the CS51220EDR16 an ideal power solution for automotive, industrial and telecom applications, among many others.

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