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What is the work of adapter in laptop?
Alternatively known as an AC/DC adapter, AC converter or charger, an AC adapter is an external power supply used with devices that run on batteries or have no other power source. AC adapters help reduce the size of a laptop computer by alleviating the need for a standard sized power supply.
Why is my laptop adapter not working?
AC adapter issues can occur due to a faulty AC adapter, faulty power cable, damage to the power or AC adapter cable, faulty DC-in connector on the laptop, and so on. The laptop does not turn on without the AC adapter connected. The battery charge is stuck at a certain percentage.
How can I fix the power of my laptop?
Drain the computer of electricity
- Disconnect the AC adapter and remove the battery (if possible).
- Hold down the power button for thirty seconds to drain any residual power from the laptop.
- Without replacing the battery, plug the AC adapter back into the laptop.
What are the inductors in a laptop power adapter?
Common-mode inductors L3 and L4 provide line fi ltering. X-capacitor C1 provides differential fi ltering, and resistors R1 and R2 provide safety from shock upon AC removal. Bridge rectifi er D1 rectifies the AC input, and bulk capacitor C2 fi lters the DC.
What kind of power supply does a laptop use?
The schematic in Figure 1 depicts a notebook adapter power supply employing the Power Integrations® TOPSwitch®-HX TOP258EN off-line switcher in a fl yback configuration. This power supply operates from a universal input to provide a 19 V, 65 output capable of operation in a sealed enclosure at an ambient temperature of up to 40 °C.
How does a top258en laptop power adapter work?
The TOP258EN (U1) has an integrated 700 V MOSFET and a multi-mode controller to regulate output by adjusting the MOSFET duty cycles, in response to current fed into the Control (C) pin. The Eco Smart® function in U1 provides constant efficiency over an entire load range.
Where are the electrolytic capacitors on a laptop?
The two output electrolytic capacitors are on the far right of the board as shown in the picture, unsolder them from the board and use the solder sucker to remove the old solder. Make note of the polarity of the old ones before you take them out and put the new ones in the same way.