The ILPI-354 V.A power board operates as an internal power regulator. It converts high-voltage alternating current (AC) from a wall outlet into standard low-voltage direct current (DC) rails to power the logic mainboard and the display panel’s LED backlighting.
The schematic will show a high-voltage N-Channel MOSFET (e.g., STP10NK60Z) connected to the primary winding of .
Understanding the structural design, component topology, and circuit schematics of the ILPI-354 V.A is essential for effective component-level board repair. 1. Architectural Overview of the ILPI-354 V.A Board Ilpi-354 V.a Schematic
| Reference Designator | Component | Role in Schematic | |----------------------|-----------|--------------------| | | 3.15A Slow-Blow Fuse | Overcurrent protection | | RV1 | 14D471K Varistor | Surge suppression (MOV) | | IC1 | ILP-354 PWM | Switching control & voltage regulation | | Q1 | IRF840 | Primary switching transistor | | T1 | Ferrite Transformer | Isolation & voltage step-down | | D9 | PC817 | Galvanically isolated feedback | | U2 | TL431 | Precision shunt regulator (sets output voltage) |
[ AC Mains Input ] ---> [ EMI Filter & Protection ] ---> [ Bridge Rectifier ] ---> [ Bulk Capacitor (450V) ] | [ Secondary Output Rails ] <-- [ Schottky Diodes ] <-- [ Isolation Transformer ] <-- [ PWM Controller / MOSFET ] | | +--> [ Logic Board Power ] +--> [ Feedback Optocoupler ] +--> [ LED Backlight Driver ] 1. Primary (Hot) Side Circuitry The ILPI-354 V
: The board converts standard wall outlet AC voltage into the low-voltage DC power required for the monitor's logic board and LCD panel. LED Backlight Driver
The ILPI-354 V.A is a widely used power supply and inverter board found in various flat-panel LCD monitors. This board is responsible for converting incoming AC power into the stable DC voltages needed by the logic board, as well as generating the high-voltage AC required to strike and illuminate the Cold Cathode Fluorescent Lamps (CCFLs) used for backlighting. Primary (Hot) Side Circuitry : The board converts
Often utilizes an LD7536 or similar PWM controller for the switching power supply section.