SG137AT-883B

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Introduction

SG137AT-883B (herein referred to as “the IC”) is a voltage regulator IC manufactured by Shanghai Semiconductor Co., Ltd. It falls under the PMIC - Voltage Regulators - Linear category. This chip is designed to regulate the voltage level of a current source. It features low voltage drop, low noise, low power consumption, and a wide input voltage range. It also offers high current output, with a maximum current output of 8.8A.

Application Fields

The IC is designed primarily for use in applications that require high current output, such as power supplies and high power devices. It can be used to provide a regulated DC voltage for a range of different applications, such as devices requiring a constant voltage for operation, including TVs, radios, lighting, motor drives, and robotics.

Due to its wide input voltage range, the IC can also be used for voltage conversion, such as for converting an AC voltage to a lower DC voltage. This is especially useful in fields such as medical devices or military hardware, where a constant output is required even in the case of a fluctuating input voltage. The IC can also be used in battery-powered applications, as it can regulate a varying battery voltage while still maintaining a constant output.

Working Principle

The IC works on the principle of linear voltage regulation. Voltage regulation is the process of maintaining a constant voltage level, regardless of changing input parameters. This is a key element for many electrical and electronic devices, as it allows for stable and reliable operation of the device, regardless of the input.

Linear voltage regulation works by comparing the input voltage to a reference voltage, then using a pass device (such as a transistor) to control the current into the load. When the load voltage is higher than the reference voltage, the pass device reduces the current. When the load voltage is lower than the reference voltage, the pass device increases the current. This maintains a constant output voltage in the face of varying loads and input voltages.

The SG137AT-883B IC uses this principle to provide a voltage regulation at up to 8.8A. The output voltage is regulated by adjusting the current flowing through a reference transistor, while the input is monitored by an internal comparator. As the input voltage increases or decreases, the comparator will detect the change and adjust the reference transistor accordingly, maintaining a constant output voltage.

Conclusion

The SG137AT-883B is a voltage regulator IC designed for applications that require high current outputs and a wide input voltage range. It utilises linear voltage regulation to maintain a constant output voltage in the face of changing input parameters. This makes it suitable for a variety of industrial, consumer, and medical applications, where a reliable and regulated output voltage is required.

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