Bm5291 Ver — 1.3 Schematic

The BM5291 Ver 1.3 schematic refers to the technical circuit blueprint for the motherboard used in the Lenovo IdeaPad S215 laptop. This document is an essential resource for technicians and hobbyists looking to diagnose board-level failures, such as power-on issues or charging circuit malfunctions. Overview of the BM5291 Ver 1.3 Board

• Two MOSFETs are used back-to-back.
• DO (Discharge MOSFET): Controls discharge. Its body diode allows charging even if the battery is discharged.
• CO (Charge MOSFET): Controls charging. Its body diode allows discharging even if charging is blocked.

If the board is beyond repair, you can find original replacements for the Lenovo S215 BM5291 on marketplaces like AliExpress or Tokopedia. Lithium-ion battery protection circuit schematic - Facebook bm5291 ver 1.3 schematic

• Inductor (L1): 4.7µH to 10µH, shielded.
• Freewheeling diode (D1): SS34 or similar Schottky.
• Feedback resistors (R1, R2): Set output voltage via formula Vout = 0.6V * (1 + R1/R2).

The BM5291 is a compact laptop motherboard designed for the Lenovo IdeaPad S215 series. The "Ver 1.3" designation signifies a specific hardware revision, which is crucial because pinouts or component values often vary between board revisions like the similar BM5290. Key Hardware Specifications: The BM5291 Ver 1

Charging Port Failure: Identifying neighboring components that may have blown due to a shorted charging port. How to Find the Schematic Two MOSFETs are used back-to-back