Schematic ((exclusive)): A20112 Power Supply

(often fully designated as the R2A20112ASP ) is an integrated circuit (IC) primarily used as a Power Factor Correction (PFC)

Before reaching the control logic, the AC line passes through an entry filter network to protect the power supply and clean the incoming signal:

The A20112 schematic typically utilizes a discrete silicon diode bridge rectifier (D1–D4) or a single integrated bridge package (BR1). a20112 power supply schematic

Understanding the A20112 Power Supply Schematic The (specifically the R2A20112 ) is a high-performance integrated circuit (IC) primarily used as a Power Factor Correction (PFC) controller . Schematics featuring this component are common in high-efficiency Switch Mode Power Supplies (SMPS), particularly those used in large-screen televisions like plasma and LED TVs, as well as industrial power systems.

As these units age (most manufactured between 2000–2005), specific components are prone to failure. (often fully designated as the R2A20112ASP ) is

They are designed to take a high-voltage AC input (often 110V/220V) and convert it into stable low-voltage DC output (commonly +5V, +12V, or +24V rails).

It shifts the phase by 180 degrees to improve ripple current on input/output capacitors. Protection Circuitry: The schematic typically includes: Over-Voltage Protection (OVP): Two modes (dynamic and static) for stability. Feedback Monitoring: Built-in detection for feedback loop opens or shorts. Soft Start: As these units age (most manufactured between 2000–2005),

Have you worked on an A20112 unit recently? Did you manage to locate the full schematic? Drop your findings in the comments below!

typically refers to the model number for a specific power supply board