phase shift. Its primary function is to shape the input current to be sinusoidal and in phase with the input voltage, achieving a high power factor. 1. Key Components of the R2A20112 Circuit
This article provides a comprehensive overview of the power supply schematic and application circuit using the , a high-performance Active Power Factor Correction (PFC) Controller . The R2A20112 is designed for interleaved critical conduction mode (CRM) power factor correction, commonly found in high-efficiency SMPS (Switch Mode Power Supplies) for digital TV, server power, and industrial equipment. a20112 power supply schematic
: In these vintage-style builds, these large capacitors are often housed in a metal cover under the chassis known as the "dog house". phase shift
: If it gets too hot while working, the system automatically shuts down to cool off, ensuring it doesn't burn out the equipment it’s powering. Where it Lives Today You won't usually see an Key Components of the R2A20112 Circuit This article
The internal architecture of the R2A20112A is quite complex. The block diagram from the datasheet shows the flow of signals, from the ZCD and FB inputs through comparators and logic, ultimately driving the GD outputs to control the power stage. The internal UVLO, voltage reference, and error amplifier form the core regulatory functions.
If the ZCD pin does not receive the signal from the auxiliary winding, the controller will not initiate switching correctly. 5. Summary Table: Common A20112 Pin Assignments