CS5171ED8G

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CS5171ED8G Application Field and Working Principle

The CS5171ED8G is a DC/DC switching regulator that is used in various power management applications. It is part of the family of high-end, ultra-high-performance DC/DC switching regulators from Cui Stack. The CS5171ED8G is an energy-efficient, low-ripple, compact power supply solution for a wide range of applications.

General Characteristics

The CS5171ED8G is designed for high quality power solutions in a variety of small form-factor applications. Featuring a low current draw of < 65mA and ultra-low noise operation, the CS5171ED8G is a perfect solution for portable, medical and battery-powered systems. This family of regulators also has an excellent thermal resistance, with an ambient temperature range of -40 degrees Celsius to +105 degrees Celsius.

The CS5171ED8G’s output current ranges from 1A to 4A and the device is protected against over voltage, over current and overtemperature conditions. This family of DC/DC switching regulators offers high output voltage accuracy of ±2%, plus low output noise of 60μVrms. The CS5171ED8G includes ultra-efficient switching frequency of up to 800KHz to maximize efficiency and minimize EMI.

Application Fields

The CS5171ED8G is a versatile device that can power a variety of applications, including: small-form-factor DC/DC converters, battery-operated applications, portable medical equipment, LED lighting systems, and embedded system applications. Its ultra-low noise operation and superior thermal performance makes it an excellent choice for these types of applications.

Working Principle

The CS5171ED8G is a DC/DC converter with a synchronous quasi-resonant converter and a control frequency of 18KHz. It employs a primary side switch current limiting mode of operation, achieving excellent output current accuracy, compatibility with a wide input voltage range, and minimizing the impact of voltage ripple. The device includes a gate driver, an adjustable reference voltage regulator, a soft-start and power good indicator, which makes the module a complete and versatile solution.

The CS5171ED8G synchronous quasi-resonant converter combines features of a pulse width modulation (PWM) converter and a zero-voltage switching (ZVS) converter. In addition to maximum efficiency, the combination of these features also results in high noise immunity, eliminating the need for a bulky external LC filter in most applications. The CS5171ED8G works in 100% duty cycle, providing output power at low input voltages, making it an ideal solution for applications where low power density needs. The device also supports pre-bias start-up, enabling operating system boot-up without prior knowledge of the input voltage level.

Conclusion

The CS5171ED8G is an excellent choice for a variety of power management applications, including ultra-high-performance DC/DC switching regulators, small form factor DC/DC converters, battery-operated applications, and LED lighting systems. The device is a low current, ultra-low noise DC/DC switching regulator, characterized by its excellent thermal resistance, high output voltage accuracy, low output noise, efficient switching frequency, and low power density.

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