A20112 Power Supply Schematic File

The secondary side contains rectifier diodes (Schottky barrier diodes for efficiency) and large filter capacitors.

This paper presents a comprehensive design, schematic, component selection, analysis, and implementation guide for the A20112 power supply. It covers functional requirements, block diagrams, detailed circuit schematics, component specifications, PCB layout considerations, thermal and EMI analysis, testing procedures, and a bill of materials (BOM). Assumptions: A20112 denotes a hypothetical single-output DC power supply delivering 12 V at up to 2 A (12 V/2 A) with both short-circuit protection and moderate line/load regulation; use-case is general-purpose bench or embedded-power application. Adjust ratings and safety standards to your exact A20112 specification if different.

AC Input Section:

Primary Side Control:

Secondary Side:

Feedback Circuit:

Component ID: A20112 (Manufactured by Namco/Delta Electronics) Application: Arcade Hardware (Namco System 246 / 256) Input Voltage: 100V – 240V AC (Auto-switching) Output: +12V, +5V, +3.3V (DC) a20112 power supply schematic

Before analyzing the schematic, understanding the standard specifications of the A20112 is critical: