Apw70 Lac391p Schematic Portable Page

The APW70 LA-C391P Go to product viewer dialog for this item.

Inductor L1 (2.2µH) – Connected between LAC391P pin 14 and output capacitor bank.

MOSFET Pair (Q1 High-side, Q2 Low-side) – Driven by LAC391P pins 9 (UGATE) and 12 (LGATE).

Bootstrap Capacitor Cboot (0.1µF) – Between LAC391P pins 10 (BOOT) and 14 (SW).

Current Sense Resistor R_sense (5mΩ) – In series with inductor for the APW70’s current monitoring.

Graphics: Options for both Integrated Intel UHD/Iris Xe graphics and Discrete NVIDIA GeForce MX350/MX450 (N17S/N18S). Key Schematic Highlights for Troubleshooting apw70 lac391p schematic portable

If you are troubleshooting a "No Power" or "No Display" issue, these are the standard voltages to verify on the LA-C391P: Main adapter voltage (Check entrance MOSFETs). +3VALW / +5VALW: Always-on voltages generated by the standby IC (TPS51225R). +1.35VPDDR: RAM power (DDR3L). +1.0V_ALW: PCH core power. +VCC_CORE: The APW70 LA-C391P Go to product viewer dialog

Repairability: Users attempting component-level repairs on this board have noted difficulty in finding reliable schematics and boardviews to trace damaged Integrated Circuits (ICs). Inductor L1 (2

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