F4901 1.1a 24v Schematic !!top!!

The part number F4901 in your query refers to a specific fuse component often found on laptop motherboards, particularly those manufactured by Wistron (which produces boards for brands like Lenovo, Dell, and Acer).

Schematic & Technical Analysis

If you are looking to understand the circuit design (schematic) of this fan to integrate it into your own project or repair a device, here is what you need to know: f4901 1.1a 24v schematic

Issue 2: Output is 24V, but Drops under Load

• Inductor Saturation: If L1 is too small (or physically damaged), the current ramps too fast and the IC shuts down. Replace with a 330µH rated for 1.5A.
• Current Sensing: The F4901 may have an internal current sense limit. The 1.1A rating is the peak switch current. If your load draws 1.2A, the IC will skip pulses, dropping voltage.

Resetting: Being a PTC, it should automatically reset once the short circuit or overcurrent condition is removed and the component cools down. If it remains "open," it must be replaced. The part number F4901 in your query refers

Part Description: POLYSW-1D1A24V-GP-U (Resettable Polyswitch). Current Rating: 1.1A. Voltage Rating: 24V. Common Locations: Lenovo B590/LB59A: Inductor Saturation: If L1 is too small (or