SCY99192BFCT260T2G

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Application Field and Working Principle of SCY99192BFCT260T2G

SCY99192BFCT260T2G, which belongs to PMIC (Power Management Integrated Circuit) and is classified as Voltage Regulators - Linear, is a two phase integrated buck regulator that is designed for small and medium motherboard platform, provides best in class power conversion efficiency and power density for desktop CPU. It adopts small TSOP package for minimized footprint, and it also supports wide input voltage range which covers from 25V to 40V.

Application

SCY99192BFCT260T2G is designed for various application fields, especially for small and medium desktop application. It achieves wattage range up to 130W with the best conversion efficiency up to 91.7%. The power density reach at 454W/in³, making it the perfect solution for medium power applications.

Working Principle

SCY99192BFCT260T2G adopts two phase architecture with digital control to maximizes the power efficiency and minimize power Lost. Two stages are rectification and buck conversion. Rectification is the process of converting AC voltage to DC voltage. The rectified DC voltage is converted to a specific output voltage through a two-way buck switching converter.

The controller integrated in SCY99192BFCT260T2G is equipped with dual loop control structure, one for voltage regulator and one for current loop control. The voltage loop with the feedback from FB pin will monitor the output voltage, and adjusts the PWM duty cycle accordingly to regulate the output voltage. The voltage mode also provides better transient performance with fast load switching.

The current loop control is responsible for current share between the two phases. The regulation range of OVP (over-voltage protection) and UVP (under-voltage protection) can be programmed up to +/-1V. Besides, the chip also provide internal soft start, power good input with programmable duration, and OCP (over-current protection).

Conclusion

In conclusion, SCY99192BFCT260T2G is a two phase integrated buck regulator that is ideally suitable for desktop application. It supports wide input voltage range and achieves wattage up to 130W, offer great power density and conversion efficiency. Equipped with dual loop control structure and various protection features, it is a cost-effective yet reliable solution for small and medium desktop application.

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