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PMIC - Voltage Regulators - DC DC Switching Controllers

SG1843Y is a DC - DC switching regulator controller manufactured by Texas Instruments. It is used to control and regulate the voltage in DC power supply. SG1843Y enables very fast transient response times and excellent stability in the presence of low to moderate output current requests.

SG1843Y is specifically designed to control and regulate DC (direct current) output voltage in a variety of applications such as LEDs, displays, industrial control, networking, communications and computing.

Features

• High switching frequency without compulsory external components
• Programmable frequency
• Integrated synchronous boost driver
• Programmable overvoltage system with AutoTrack and AUTOTUNE
• Independent input and output soft-start pins
• Automatic PWM amplifier
• Programmable overcurrent protection
• External clock synchronization
• Integrated 1A, 2A linear FET

Applications

• DC/DC conversion
• Voltage regulation
• Power supply
• LED lighting
• Display control
• Industrial control
• Networking
• Communications
• Computer systems

Working Principle

SG1843Y works by using the power from an external power supply. The power is converted from AC to DC and is then regulated by load or resistance. A series of capacitors and inductors are used to reduce voltage ripples, noise and current spikes. SG1843Y also contains an overvoltage protection which is used to protect the device from any unexpected voltage surges. Additionally, SG1843Y integrated synchronous booster driver can be used to increase the output voltage for higher performance applications.

The internal switching frequency of SG1843Y is determined by an external clock signal. An internal programming voltage is then used to control various operational modes such as auto-track and auto-tune. These operational modes allow the controller to automatically adjust the output voltage based on the load or resistance. Finally, the output voltage is further regulated by an internal amplifier.

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