The advantage of USB Cable Type C is that it supports higher current, that is that more current can be passed by Type-C in the same time. In this way, the charging speed of the device can be accelerated. At present, the charging current of most Type-C data lines is generally 2A. If the charging rate of 3A is to be reached, a high-current wall charging matching it is required. That is to say, if the wall charge only supports 1A, whether it is charged with 2A or 3A data line, there is no difference fundamentally. If the current supported by the wall charging is 2A, and the type-C data cable of 2A/3A is matched, the effect can be significantly changed.
The highlights of Type-C interface are thinner design, faster transmission speed (USB3.1 up to 10Gbps) and stronger power transmission (up to 100W).The biggest feature of Type-C double-sided plugable interface is that it supports double-sided insertion of USBinterface. Officially solved the USB never insert the worldwide problem, the front and the back of the random plug.The USB Cable used with it must also be thinner and lighter.
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AnalogicTech has announced two new high-performance charge pump products that help designers design mobile phones that are more versatile. The two AAT2846 and AAT2856 devices are housed in a 4x4mm package with integrated backlight driver, high current flash driver and two general purpose low dropout linear regulators. To avoid the use of multiple chips in space-constrained portable applications, the new devices maximize design flexibility by providing separate control functions for backlighting and flash current drive through a separate single-wire digital interface.
Excellent performance
The AAT2846 features a high current, triple mode charge pump capable of driving up to six backlight LEDs to deliver up to 30mA per LED. It can also drive two flash LEDs with a total current of up to 600mA. For applications that do not require flash, the AAT2856 provides a high current, triple mode charge pump capable of driving six backlight LEDs, delivering up to 30mA per LED.
Both the AAT2846 and AAT2856 feature AnalogicTech's AS2Cwire serial digital control single-wire interface that individually turns the backlight and flash LED drive currents on and off. From 95μA to 30mA, the AAT2846 and AAT2856 backlight LED currents are set up to 32 levels; 20mA full-scale current and special microcurrent are also available to achieve optimum performance at low LED current levels. The six backlight outputs can be split into 5+1 format to support dual-screen mobile applications. In addition, the 6 LED outputs can be individually controlled by calling a special operating mode. Customizable, programmable settings for any main/sub-display, keyboard illumination, general status signals or flash signals are therefore possible. In order to achieve maximum brightness of the white LED, the backlight current matching ratio between channels is 1%.
The two flash output currents on the AAT2846 can be set to up to 16 levels with an external resistor, up to 300mA each (total current 600mA). In order to balance power consumption, the flash current matching ratio between channels is 4%.
Both devices integrate two high performance, low noise LDOs. Each LDO uses its own independent select input to support up to 200mA of output current. In order to meet the basic power requirements of various functions, such as a house controller or camera module, the output voltage of each LDO can be programmed to vary from 1.2V to 5V through a resistor divider. The two independently controllable LDOs of the AAT2846 and AAT2856 increase the flexibility of the system designer when sequencing multiple external power supplies.
Both the AAT2846 and AAT2856 have built-in short-circuit protection and overtemperature protection. The soft-start circuit automatically blocks excessive inrush currents during turn-on and mode switching.
Price and availability
The AAT2846 is specified over the -40 to +85°C temperature range and is available in a Pb-free, 28-pin TQFN44 package. The unit price is $1.42 per unit when order quantities are 10,000. The AAT2856 is priced at $1.14 each in quantities of 10,000.
About AnalogicTech
Advanced Analogic Technologies Incorporated (AnalogicTech) is a provider of integrated power management (TM) semiconductor solutions for mobile consumer electronics devices such as wireless handsets, notebooks and tablets, smart phones, digital cameras, wireless LANs and personal media player. The company's design and marketing efforts focus on application-specific power management for consumer, communications and computing applications in these rapidly evolving devices. AnalogicTech also develops and licenses devices, processes, packaging and application-related technologies. AnalogicTech is headquartered in Sunnyvale, Calif., with offices in Korea, Taiwan, Hong Kong, Macau, Shanghai, Shenzhen, Beijing, Japan, Sweden, the United Kingdom, and France, as well as a worldwide network of sales representatives and distributors. The company is listed on the NASDAQ exchange under the ticker symbol AATI. Foshan Electric: will mainly invest in green lighting projects
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In addition, the device equipped with the Type-C interface can be charged by connecting the mobile power supply through the Type-C cable or Usb C Cable. Users do not need to carry the charging cable, but can have the wall charging and Type-C cable. In addition, when selecting a Type-C charging cable, We should pay attention to the current limit. The charging data cable 1A does not have fast charging performance, 2A is the most commonly used Type-C charging data line, and 3A is the best data line at present. If you want to have fast charging effect, you must choose the Type-C charging data line with 3A current.
