SG7912AK-883B

SG7912AK-883B Application Field and Working Principle

Linear voltage regulators are a type of Power Management IC (PMIC) which are commonly used in power supplies, smart battery charging and other power management applications. SG7912AK-883B is one of the linear voltage regulators developed by Shanghai Guanhua Group. It offers stable, reliable solutions for converting various DC/DC inputs from a wide range of voltages and currents, allowing system to reduce size, cost and power consumption.

Features

• Wide voltage range - The SG7912AK-883B is designed to work with input voltages that are as low as 9V and as high as 20V.
• Fast load transient response - Offers a fast load transient response, making it ideal for applications which require fast load transients.
• Overvoltage protection - The SG7912AK-883B has overvoltage protection, reducing the risk of damage to the system if the voltage exceeds the maximum safe limit.
• Low power consumption - SG7912AK-883B consumes as lower power than its competitors, as low as 15 mW, making it a low power consuming linear voltage regulator.
• High efficiency - 85% minimum efficiency at 12V input and 5V output.
• Low standby current - <14µA typically which is considered to be excellent in terms of residual power consumption.
• Wide temperature range - It has an operating temperature range of -40°C to +85°C.

Applications

The SG7912AK-883B can be widely used in any kind of power supplies, such as in computers, servers, laptop power supplies, LCD TVs, LED lighting, as well as in other industrial equipment, such as industrial automation, automotive, communications, etc. In general, the SG7912AK-883B can be used for applications that require a stable voltage output, such as in audio and digital products, cellphones, VOIP, battery-powered devices, etc.

Working Principle

The SG7912AK-883B works based on the linear voltage regulator principle. It takes an input voltage and with the help of an internal error amplifier, it regulates the output voltage to match the internal reference voltage. The error amplifier compares the output voltage to the reference voltage and feeds the difference back to the control circuit, adjusting the voltage regulator\'s output as required, by varying the current through the pass transistor.

The SG7912AK-883B has an internal thermal shutdown and short-circuit protection which help ensure that the device will not be damaged in case of overloading, overvoltage or excessive power dissipation.

The SG7912AK-883B also has a wide input voltage range, low power consumption and high efficiency, making it an ideal choice for applications which require a regulated voltage output.