SG2843M

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SG2843M Application Field and Working Principle

SG2843M is an advanced DC-DC switching regulator designed for high reliability and low cost, small form factor applications. It is a high efficiency, low cost device which integrates control, protection, and communication functions in a small package.

SG2843M is widely used in small and medium-sized personal electronic equipment such as mobile phones, tablet PCs, and digital products. It can be used as a driver for Schottky diodes and Step-Down drivers for step-down converter circuits, as well as for battery and load discharge applications.

Principle of Operation

The SG2843M operates as a DC-DC buck-boost converter with the ability to increase or decrease the output voltage. The duty cycle of the switch is determined by an internal error amplifier which senses the difference between the reference voltage and the output voltage. The buck-boost switch is controlled by a pair of error amplifiers connected as a Buck/boost converter.

When the output voltage exceeds the reference voltage, the error amplifier is activated and the switch is closed, reducing the output voltage. When the output voltage is below the reference voltage, the error amplifier is activated and the switch is opened, increasing the output voltage. The device is able to provide a regulated output voltage over a wide range of input voltages and load conditions.

Features and Benefits

The SG2843M is a high efficiency DC-DC switching regulator, providing a regulated output voltage over a wide range of input voltages and load conditions. It features a thermal lockout circuit which prevents excessive power dissipation, an overvoltage protection circuit which shuts off the device if the output voltage exceeds the predetermined level, and an overload protection circuit which shuts off the device if the load current exceeds the predetermined level.

It is an easy-to-use device with low external component count, requiring a minimum number of components for system design. It also has low power dissipation, no external components required for diode short-circuit protection, and a wide range of operating temperature.

Conclusion

The SG2843M is a high efficiency, low cost DC-DC switching regulator designed for use in high reliability, small form factor applications. It is easy to use with low external component count and low power dissipation. It has built-in protection against overload, overvoltage and thermal lockout. This makes the SG2843M an ideal choice for applications requiring high reliability and low cost.The specific data is subject to PDF, and the above content is for reference