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Delve deeply and work diligently to achieve new heights
All colleagues unite and focus their efforts to write a new chapter of developmentPower adapter specifications
所属分类： Industry News
发布时间：2020-06-16
For all laptop enthusiasts who’ve just purchased a new notebook, its overall performance is of paramount importance. But how much do you really know about the power adapter—commonly referred to as the charger—that powers your laptop? Don’t let the excitement of your new purchase blind you to the critical role your charger’s quality plays in your device’s longevity and performance. First and foremost, make sure you understand the specifications of your power adapter.
Power adapters contain many electronic components that we may not be able to identify. Naturally, because these components vary in quality, your adapter can exhibit a power‑output variation of 0.1% to 5%. Many users experience their computer screens shutting off unexpectedly while playing graphically intensive online games—this is often caused by insufficient output power (i.e., too low output current) from the power adapter. First, you should familiarize yourself with the internal structure of your adapter.
1. It is broadly divided into four parts: A is the input cable (AC power cord), B is the charger body, C is the output cable (DC cord), and D is the connector.
2. Next, turn the adapter over and examine its specifications. The three key parameters that laptop enthusiasts should pay close attention to are output power, voltage, and output current. You might wonder: what about the input specifications? In fact, the adapter’s role is to convert the unstable AC power we use in everyday life into a stable DC voltage suitable for charging your laptop. (For this particular adapter, the three main specs are 90 W, 20 V, and 4.5 A.)
3. What does AC/DC on the surface mean?
For AC use (e.g., household and office appliances all operate on alternating current, so they are referred to as AC‑powered).
DC use (for example, both cars and airplanes use direct current, so it’s referred to as DC use).
Actually, it’s quite straightforward when you look at the specs—just check the input voltage, the output voltage, and the output current. But keep this in mind: when you buy one, make sure to confirm whether the output is DC or AC, what the voltage is in volts, and what the current is in amperes. If the power supply’s current rating is too low, it definitely won’t work; a mismatch could even burn out the transformer. If the current isn’t exactly the same as yours, a slightly higher rating is fine, but don’t go much higher!
Detailed explanation of the adapter’s parameters:
1. The input voltage conforms to the international standard of 100–240 V.
2. The output parameters of a USB port are typically 5 V at 0.6 A, 0.8 A, 0.9 A, 1 A, or 1.5 A, making it compatible with all USB‑charging devices; the charging speed simply varies depending on the device’s capacity. If you really need to know the exact VA rating, just use an ammeter to measure it.
All of the above information has been presented with a focus on the specifications of power adapters. Power adapter manufacturers strongly advise that, when using or purchasing a power adapter, you carefully check its specifications, as this is crucial for ensuring your safety.