The mobile power supply is a portable charger that integrates power supply and charging functions. It can be used to charge or standby power to digital devices such as mobile phones. A lithium battery cell or a dry battery is generally used as a power storage unit. A battery that is different from the internal configuration of the product is also called an external battery. Generally equipped with a variety of power adapters, usually with large capacity, multi-purpose, small size, long life and safe and reliable, can be used to power smart phones, tablets, digital cameras, MP3, MP4 and other digital products anytime, anywhere. Or a functional product that stands by for charging.
The mobile power supply can be used by any USB-compliant device through the USB Cable. It has short-circuit, overcharge and over-discharge, constant-current and constant-voltage protection, as well as high-performance power management technology.
The mobile power solution is divided into two technical routes: hardware mobile power and software mobile power, depending on whether it can be programmed. The main problems with hardware mobile power solutions are:
1. The fever is serious, adopting the non-synchronous rectification mode. After the temperature is high, the constant current and constant are not allowed, which may damage the battery or even burn the mobile phone being charged.
2. Due to process variation, the dispersion of current and voltage parameters is large. When mass production is performed, the defect rate is high and it is difficult to control.
3. Not programmable, functional curing, parameter curing, can not meet the needs of differentiation.
The software mobile power solution is easy to realize synchronous rectification, high efficiency, low heat generation, and flexible function changes, which has become a development trend.
The MC32P21 is an 8-bit RISC architecture microcontroller that is ideally suited for mobile power solutions. Its main features are as follows:
â— Wide operating voltage range â— 1K program space, 128 bytes RAM, 8-level stack â— 2-channel high-speed PWM output â— 7-channel 12-bit ADC with built-in reference source â— Built-in oscillator with less than 2% deviation â— High anti-interference ability
The hardware block diagram of the mobile power solution developed by MC32P21 is as follows: 
The system uses MC32P21 single-chip microcomputer as the control core, real-time sampling, sampling data is processed by the single-chip microcomputer to complete the current voltage and current measurement, then the voltage is displayed through the LED light, and the whole system is controlled according to the value of current and voltage. The system main control program flow is as follows: 
Antenk DVI Series Digital Video Interface connectors are the standard digital interface for flat panels, video graphics cards, monitors and HDTV units. This series includes DVI-D (Digital), DVI-A (Analog) and DVI-I (Integrated Digital/Audio). Their unique crossing ground blades provide high speed performance at low cost. They are available in Straight or Right Angle PCB mount receptacles and mating male cable connectors. They support a data transfer rate of 4.95Gbps with a dielectric withstanding voltage of 500VAC. Each version features our specially designed contacts which improve signal performance and a zinc alloy shield that reduces electromagnetic interference (EMI).
Digital Visual Interface Cable Connectors
DVI ConnectorWith the advent of technologies such as DVD players, high-definition televisions, and even digital cable, the need for more advanced cables and connectors has increased. Digital Visual Interface (DVI) is one response to the growing need for interconnected systems, enabling digital systems to be connected to an array of displays. Yet DVI cables and connectors can also be complicated, and may lead to confusion between High Definition Multimedia Interface (HDMI) and DVI. Although the two systems have much in common, they service different niches of digital technology.
Digital Visual Interface
Older systems aren`t necessarily outdated systems. Although DVI preceded HDMI, it`s still widely used in both business and domestic settings. DVI connectors are designed to handle digital data transmission, incorporating three transmission channels in every connector link. The maximum bandwidth for data transfer is 165 megahertz, which is enough to relay up to 165 million pixels per second. Data is encoded for effective transfer, but a single link can handle around 4.95 gigabits per second of information. Double links can handle twice that amount.
Because a DVI cable carries information over a 165 megahertz bandwidth, complete digital resolution can be obtained. Using double link connectors increases the speed of transmission, but requires another cable. However, not many devices depend solely on a double link DVI, so this technolgy can be used on an as-desired basis.
Types of DVI Connectors
There are three general categories of DVI cable connectors: DVI-Digital (DVI-D), DVI-Integrated (DVI-I), and DVI-Analog (DVI-A). However, most connectors fall into one of the first two groups.
A standard DVI Connector is 37 mm wide and has 24 pins, 12 of which are used for a single link connection. When analog is involved, four additional pins are needed to support the additional lines of an analog signal. It is not possible to cross from a digital source to an analog display or vice versa. In those instances, an integrated connector is probably the best option. There are five common types of DVI connectors.
DVI-I Single Link
This kind of connector has three rows, each with six pins. There are two contacts. Because the connector is integrated, it can be used with both analog and digital applications.
DVI-I Dual Link
A DVI-I dual link connector can also be used with both digital and analog applications, but is configured with more pins to accommodate a dual connection. There are three rows with eight pins each, as well as two contacts.
DVI-D Single Link
Specifically designed for digital applications, a DVI-D single link connector has three rows of six pins, and looks much like a DVI-I single link connector. However, a DVI-D connector has no contacts.
DVI-D Dual Link
Also made specifically for digital applications, a DVI-D dual link features more pins (three rows of eight) for dual connections. Like a DVI-D single link, a DVI-D dual link connector has no contacts.
DVI-A
This particular type of connector can only be used for analog applications, and has three rows of pins. One row has five pins, one has four pins, and the last row has three pins. Like single link connectors, a DVI-A link connector has two contacts.
Male DVI Connector
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