Schematic: F4901 1.1a 24v
A high-voltage electrolytic capacitor (typically rated for 400V–450V) smooths the pulsating DC into a steady high-voltage DC rail. 2. Switching and Control Stage PWM Controller:
The F4901 1.1A 24V schematic is a type of electronic circuit diagram that illustrates the connections and relationships between various components. The "F4901" refers to the specific model or part number of the circuit, while "1.1A" indicates the maximum current rating and "24V" represents the operating voltage.
Before looking at the schematic layout, it is vital to understand the electrical parameters of this component: Current Rating ( Iholdcap I sub h o l d end-sub f4901 1.1a 24v schematic
Show you a more with accompanying protection diodes.
The part number 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). The "F4901" refers to the specific model or
For a 24V system, the F4901 must be rated for a voltage higher than the nominal 24V (often 32V or 63V) to ensure it can successfully quench any internal arc when it blows.
+-----------------+ | AC Input (L) | +--------+--------+ | F1 (Fuse 1.5A Slow) | +----+----+ | L1 (Common Mode Choke) +----+----+ | | C1 (X2) | | | +----+----+ | Bridge Rectifier (DB1) | +----+----+ | | C2 (100uF/400V) | +---+---+ | R2 (Startup Resistor - 150k)| +---+---+ | Primary Side IC (PWM Controller - Likely OB2263 or AP8012H) | +---+---+ +---------+ | Q1 (MOSFET - 4N60)|-----| T1 (Transformer) | +---+---+ +----+----+ | | R3 (Current Sense - 0.68 Ohm) | | | GND Secondary Winding | +---+---+ | D1 (Schottky Diode - SB3100)| +---+---+ | C3 (470uF/35V) | +---+---+ | R4 (Load Resistor - 1k)| +---+---+ | +---+---+ | U2 (Optocoupler - PC817)| +---+---+ | +---+---+ | U3 (Voltage Ref - TL431)| +---+---+ | R5 & R6 (Voltage Divider for 24V) | 24V DC Output (+) GND Secondary (-) For a 24V system, the F4901 must be
The identifier refers to a specific silk-screened marking found on the motherboard of several laptop models, most notably the Acer Aspire 5560 and 5560G . In technical contexts, "F4901" typically designates a surface-mount fuse (F) on the board's power rail, rated for 1.1 Amps and a maximum voltage of 24 Volts. Motherboard Context
Polytronics (e.g., SMD1206P110TFT) or Tyco Electronics (Raychem). Technical Schematic Context
Such as the ISL6267 or RT8207 for various voltage steps.
