The R2A20112 features a two-mode OVP. If a sudden drop in system load causes a voltage spike, the chip safely suppresses gate drive pulses until nominal levels return. Pin Configuration and Functionality Guide
Before analyzing the schematic, we must understand the context. The A20112 is typically a single-output or dual-output AC/DC converter with the following common specifications: a20112 power supply schematic
) sits in series with the main current path. As the load draws more current, the voltage drop across RSensecap R sub cap S e n s e end-sub increases according to Ohm's Law ( The R2A20112 features a two-mode OVP
Measure voltage across C4 (VCC pin of PWM IC). It should rise to 12–18V. If it stays below 10V, replace C4 and check R5 (startup resistor). If still low, the PWM IC may be shorted. The A20112 is typically a single-output or dual-output