MagSafe

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MagSafe is a series of magnetically installed power connectors, originally introduced by Apple Inc. on January 10, 2006, along with the MacBook Pro at the Macworld Expo in San Francisco, California. The connector is held magnetically so that if it is unplugged - for example, by someone tripping the cable - it will pull out of the socket without damaging the computer's power connector or socket, and without pulling the computer from the surface where it is located.

Video MagSafe

History

The basic concept of MagSafe is copied from a magnetic power connector that is part of many Japanese restaurant fryers and cooking utensils since the early 2000s to avoid spilling dangerous heat contents. Apple granted US Pat. 7311526 on MagSafe ("Magnetic Connector for Electronic Devices", issued in 2007) because MagSafe is considered a sufficient increase because the connectors are symmetrical and reversible, and the fact that the magnets inside the connectors are arranged in opposite polarity to increase the clutch strength.

Apple has gradually removed the MagSafe connector; The relaunched MacBook Pro and fourth generation MacBook Pro replace it with a USB-C port used to charge and sync data. Starting April 2018, MacBook Air and 2015 Retina MacBook Pro is the only device left to use the MagSafe connector.

Maps MagSafe

Features

MagSafe has a connector pin designed so that the nick connector can be inserted in either orientation (however, the L-shaped connector version can only be mounted in one orientation without blocking neighboring ports, such as USB). LEDs on the top and bottom of the connector are green if the computer battery is fully charged and yellow or red when the battery is charging. MagSafe can be found on notebook computers MacBook, MacBook Pro and MacBook Air, as well as Apple LED Cinema Display.

The MacBook and 13-inch MacBook Pro use a MagSafe 60W charger, while the MacBook Pro 15 and 17 inches use a MagSafe 85W charger. MacBook Air has a 45-W version lower than the MagSafe adapter. The power cubes are smaller, but the MagSafe connector is the same as the 60 W and 85 W chargers. According to Apple, an adapter with a watt equal to or higher than originally supplied can be used without problems.

Apple previously offered the "MagSafe Airline Adapter" for use on certain compatible aircraft. It has a DC input (not AC like the original MagSafe charger) and will turn on the computer, but will no charge the battery.

Some of Apple's desktop displays include a MagSafe connector cable that allows charging an Apple laptop.

MagSafe 2

MagSafe 2 is introduced on MacBook Air and Macbook Pro with Retina in mid 2012. It is not compatible with old MagSafe connectors without adapters, and returns to a T-shaped design that leads out directly, rather than the L-shapes running along the side of the machine. The connectors are made smaller to fit a thinner laptop. MagSafe 2 was first announced at the 2012 Worldwide Developers Conference on July 11, 2012.

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Pinout

Pin connector MagSafe allows the adapter to be inserted in one of two orientations. The first and second pins on each side of the small central pin have continuity with their mirror pins.

• The inner large pin is V (14.5/16,5/18,5/20 V DC). Measuring without load will give 6.86 V DC for MagSafe and about 3 V DC for MagSafe 2; the full voltage is applied after the ~ 40 kOhm load is applied for one second.
• Large outer pin is ground.
• A small center pin is a data pin using the 1-Wire protocol. The computer uses this pin to change the color of the LED and retrieve the serial number and wattage from the power supply.
• Only two wires - power and ground - go to the charging unit. There is no data communication through the pin sense adapter with the charger unit itself.
• The maximum voltage given is as follows:
  • 14.5 V DC for the 45 W unit supplied with MacBook Air
  • 16.5 V DC for the 60 W unit included with MacBook and 13 "MacBook Pro
  • 18.5 V DC for 85 W units supplied with 15 "and 17" MacBook Pro
  • 20 V DC for the 85 W unit supplied with 15 "MacBook Pro Retina

The rectangular metal layer that surrounds the pin has no electrical function. It acts as a shield for electric pins and metal pullers for magnets in laptops.

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Third-party products

Although Apple does not license MagSafe connectors for use in third-party products, manufacturers have designed solutions: their MagSafe items use the actual connectors of the Apple AC adapter, which are grafted onto their own products. Because it uses actual Apple products, legally purchased, the manufacturer believes that no license agreement is required (the principle referred to as the first sales doctrine) and the patent is not infringed. However, in 2010 Apple is still suing one of these manufacturers, Sanho Corporation for selling a very popular HyperMac battery extension product that Apple claims infringes on their patents. Sanho has since no longer sold the connector cables for the HyperMac external battery series.

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Disabled

Many users have reported (as of 30 October 2011) issues with the quality of the MagSafe cable construction, delivering a low mark product on the Apple Store site. Common complaints include plugs separating from the cord, the shorting transformers, and the spring pins lose elasticity.

Several methods have been designed to protect MagSafe from failure, including wrapping the cable with a ribbon or shifting a protective plastic around the cable.

In 2008, Apple posted an official response that recognized the problem with the MagSafe adapter, which included an incomplete circuit connection and a white isolation adapter that separates it from the magnetic end of the MagSafe connector. After releasing the Knowledge Base article, a class action lawsuit was filed on May 1, 2009, in the US District Court for the San Jose District Office of Northern California, alleging that the MagSafe power adapter is susceptible to frayed and overheated cables. , and therefore a fire hazard.

Apple released a firmware update in October 2010 that claimed to solve this problem. However, the firmware update installer will not run on certain old MacBooks, which means the firmware can not be updated. This, in turn, means that it is not possible to use the new MagSafe power adapter with this MacBook. However, by 2017, Apple still sells older MagSafe power adapters.

In 2011, Apple posted supporting documents on tension relief with MagSafe-style MagSafe ("T") power cables, and offered a bid settlement for Apple buyers of 60W or 85W MagSafe MPM-1 adapters in the first three years of purchase.

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Previous power system

Before MagSafe, Apple laptop computers (like most non-Apple laptops) use shell and socket/pin settings, or coaxial power connectors. The iBook series introduces a charger that resembles a mini-stereo connector with an additional metal ring. The first iBook-shaped battery charger has only a silver plug body, but a square-colored filler introduces a color changing ring that indicates the charging status.

Stumbling on the iBook cable or pulling the outgoing cable at an angle can bend the spring contact inside the connector or break the solder pad under the connector, producing a laptop that will fail to charge when connected to the cable, or will only fill if the inserted plug is sustained or pressed down on an angle. A very strong yank can burn an outer flange or even break the end of the power plug.

Mengganti "DC-In Board" yang rusak pada awal 12 inci G3 iBook biasanya melibatkan pembongkaran 50 langkah yang mahal dari laptop.

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Galeri

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Referensi

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Tautan eksternal

• "Kekuatan Magnet" (ulasan). MacBook Pro. Ars Technica. Â , bagian dari tinjauan Ars Technica dari MacBook Pro yang didedikasikan untuk konektor MagSafe.
• "Di mana Adaptor MagSafe untuk Mobil dan Pesawat Terbang?". ZDNet.
• "MagSafe" (paten). Apple Inc.

Source of the article : Wikipedia