New
Candy Jump
Always start with no load and a soft‑start (gradually increase Vin). This helps you isolate whether the problem lies in the input stage or the regulation loop.
is a laptop motherboard schematic commonly found in Dell Inspiron 15 (3558/3559/5558/5559) models. The "top" view typically refers to the
Each pole has two screws (line and load). For NO-1: 13 (in) and 14 (out). Some older schematics label by pole only.
If you have any more details about the component (like its supposed function, manufacturer, or where you encountered it), I might be able to provide more targeted advice.
If you have access to a specific LAD402P datasheet or application diagram, further details can be provided for a more tailored explanation!
| Desired Change | What to Modify | Why | |----------------|----------------|-----| | | Increase R2 or decrease R3 while keeping the ratio (1+R2/R3 = Vout/Vref). | The LAD402P’s Vin must stay at least 0.5 V above Vout; ensure Vin ≥ Vout + 0.5 V. | | Lower Output Current (e.g., 500 mA) | Insert a larger sense resistor (R5 = 1 Ω) to bring the internal current‑limit down. | Protect delicate downstream loads. | | Battery‑Powered Design | Choose low‑ESR, high‑temperature capacitors, and add a reverse‑polarity MOSFET (P‑channel) instead of a diode to reduce loss. | Batteries are sensitive to voltage drop; MOSFET offers < 0.1 V loss. | | Ultra‑Low Noise Audio Amplifier | Add an LC filter after Vout (e.g., 10 µH + 4.7 µF) and use NP0/C0G capacitors for C2. | Improves PSRR and reduces audible hiss. |
